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  • SLOB: ?????????????

    - by katsumii
    Oracle DB????????????????????????????Introducing SLOB – The Silly Little Oracle Benchmark « Kevin Closson's Blog: Platforms, Databases and StorageSLOB supports testing Oracle logical read (SGA buffer gets) scalingSLOB supports testing physical random single-block reads (db file sequential read)SLOB supports testing random single block writes (DBWR flushing capacity)SLOB supports testing extreme REDO logging I/O????????????????Oracle?????????Swingbench ??????????IPC Semaphore?????C???????????????????Windows???????????Cygwin??????????????????????????????SwingbenchSwingbench can be used to demonstrate and test technologies such as Real Application Clusters, Online table rebuilds, Standby databases, Online backup and recovery etc.???????I/O?????????????????Oracle ORION DownloadsORION (Oracle I/O Calibration Tool) is a standalone tool for calibrating the I/O performance for storage systemsSLOB ??????????????????????????? 

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  • ??·???|WebLogic Channel|??????

    - by ???02
    Java?????????????????????Oracle WebLogic ??????????????????????????WebLogic?????????????????????????WebLogic????????????????????????????????????????????JPA 2?EJB 3.1?JSF 2????????! WebLogic Server 12c?????????Java EE 6?????? [ 2012/05/22 ]???????????! Java EE 6???????????????/???????!!――??UFJ????????????????????????Java EE 6??????JavaOne Tokyo 2012????? [ 2012/05/21 ]??????????????! Java EE 6???????????????/???????!!――??UFJ????????????????????????Java EE 6??????JavaOne???????????! Java EE 6???????????????/???????!!――??UFJ????????????????????????Java EE 6??????JavaOne Tokyo 2012???????UFJ?????????????????????????IT??????? ?????????UFJ?????????/????????2007?7????????????JavaEE5?????????Java EE??????????????????????2012?4???????JavaOne Tokyo 2012??????????Java EE 6?????????????????????????Java EE 6???????????????????????????????????????????Java EE 6???????"??????????????"???????????????????????????????????(???)??????????????????????????????/???????????Java EE??????????――??????????????????????JavaOne Tokyo 2012?????????????????????????????/???????????Java EE??????????――??????????????????????JavaOne Tokyo 2012???????????·???????????????????·???????????????????/????????????????????????????――?????6?????????????????????WebLogic Server?????????????????????????????????????????????????????????2012?4???????JavaOne Tokyo 2012????????????????????·????????????????Java EE???????????????????????????????(???)??????WebLogic Server 12c?????????Java EE 6??JPA 2?EJB 3.1?JSF 2????????! WebLogic Server 12c?????????Java EE 6??????????????????????????????????????????????·???????????Java EE 6???????????????·????WebLogic Server 12c?(???)?????????Oracle Enterprise Pack for Eclipse 12c???????Java EE 6??????3???????????????????????JSF 2.0?????????????????????????JAX-RS????RESTful?Web???????????????(???)??????JPA 2?EJB 3.1?JSF 2????????! WebLogic Server 12c?????????Java EE 6??????2012?2???????????????WebLogic Server 12c?????????Java EE 6?????????????????????????????????????????????????????????????Oracle Enterprise Pack for Eclipse 12c??WebLogic Server 12c(???)????Java EE 6??????3??????????????????????????????JPA 2.0??????????·?????????EJB 3.1???????·???????????????(???)??????JPA 2?EJB 3.1?JSF 2????????! WebLogic Server 12c?????????Java EE 6???????????·??????·?????????????????????????WebLogic Server?2012?2?????????????????WebLogic Server 12c????????????????????????Java SE 7???Java EE 6???????????Java EE??????????????????????????????WebLogic Server 12c????Java EE???????????????????????? ??????WebLogic Server 12c???????????????????Oracle Enterprise Pack for Eclipse 12c??WebLogic Server 12c(???)????Java EE 6??????3??????????????????????????????????????????????????????????Java EE?????????????????????????????????????????(???)??????Oracle Open World Tokyo 2012?????·????2013??Java SE 8????GUI???JavaFX?...Java SE??????――Oracle Open World Tokyo 2012?????·???????·??????????????????????????????????????????????????Java?????????????????????????1?????2012?4?4?~6???? ??????????Oracle Open World Tokyo 2012??????????·?????????Java Product Group??????·????????????·?????Java SE?????????????????????????Java SE??Java 12?????:Java SE????????????????????????????????Java SE?????????????????(???)??????WebLogic Server 12c?????????Java??????――Oracle Open World Tokyo 2012?????·????2012?4?4?~6???? ??????????Oracle Open World Tokyo 2012????????????Java?WebLogic Server??????????1???????????·???????? ?????????????????????·??????????????Oracle WebLogic Server 12c ???????????Java???- ???????Java EE??????????????????????????WebLogic Server??????????????????????(???)??????????????????IT?????????! Oracle OpenWorld Tokyo 2012?????????????!!????????????IT?????????! Oracle OpenWorld Tokyo 2012?????????????!!2012?4?4?~6???? ????????????????Oracle OpenWorld Tokyo 2012???????????????????????????????????Java????????????????????????????????????????????????????????IT???????????????IT????????????????? "?????"???????????WebLogic Server??????????????Java????????????????????????IT?????????????????????????????(???)???????Beginning Java EE 6?????????Java EE 6?????????????????Beginning Java EE 6?????????Java EE 6?????????????????JavaServer Faces 2???????6???????????????????????????????????????Java EE?WebLogic Server?????????????????·????????????????????????????????????????Java EE 6???????Java EE??????????? ??????Java EE 6??????????Beginning Java EE 6 GlassFish 3????????????Java????????????????????????Web?????????GUI?????JavaServer Faces??????(???)???????Beginning Java EE 6?????????Java EE 6?????????????????Java Persistance API 2??2012?2???????????????Oracle WebLogic Server 12c????????????Java EE 6?????????????????Java EE 6?????Java EE ??????????????1??????????????????????Java EE?????????????? ???3??????????Java EE 6??????????Beginning Java EE 6 GlassFish 3????????????Java????????????????????????????????Java EE 6???????API?????????????????????????????????(???)??????4?4??5??Java??????????! "Java??"????????????!!――?JavaOne Tokyo 2012????????4?4??5??Java??????????! "Java??"????????????!!――?JavaOne Tokyo 2012????????2012?4?4?~5??2?????????????????49????Java????????????????JavaOne Tokyo 2012???????? "Java??????"??????JavaOne??Java??????????????·???????????????????????????????????????????????????JavaOne Tokyo 2012???????????????(???)???????????????????????Java EE 6???????????!?――WebLogic Server 12c???????????????????????????Java EE 6???????????!?――WebLogic Server 12c???????????????·??????·??????????????????????????????WebLogic Serve????WebLogic Server 12c?????????????200???????/????????????????·????"??"?1????Java EE 6?????????????????????????????????????? ??????·?????????WebLogic Server???????Java????????????????Java EE??????????????????????·?????????(???)???????Oracle WebLogic Server 12c Forum?????Java EE 6????????????????????????? ?????????????――?Oracle WebLogic Server 12c Forum?????Java EE 6?????????????????????????????Oracle WebLogic Server 12c??????????????????????????????????????? 1?25????????Oracle WebLogic Server 12c Forum - ????????Java??????????? -??????????·?????????WebLogic Server 12c??????? Java EE 6?? ~Java EE 6???????????????????~??????????????UFJ???????????????????????????????????????Publickey ??????Java EE 6????WebLogic Server 12c???????????????(???)??????Java EE 6?????????????? "?"????? ??????????????Oracle WebLogic Server 12c??????????????????????Java EE?????Java EE 6??????????????????????????????Java EE 6?????????WebLogic Server 12c??????????Java????????????????????? 1?25????????Oracle WebLogic Server 12c Forum - ????????Java??????????? -?????WebLogic Server 12c??????? Java EE 6?? ~Java EE 6???????????????????~????????·???????????????????????????Java?????????????Java EE 6?WebLogic Server??????????????2??????????(???)?????????????Java EE??????WebLogic Server 12c??????3????――?Oracle WebLogic Server 12c Forum????????????2012?2?7??Java EE??????????·???????Oracle WebLogic Server 12c?????????????????????1?25????????????Oracle WebLogic Server 12c Forum - ????????Java??????????? -????Java EE 6?Java SE 7???????Java???????WebLogic Server 12c?????????????????·?????????????????????3??????????????????????(???)????????????????????·??????????! ????WebLogic Server?????????????????????????Java EE????????·????????????????/??????????????????????·?????????????????????????WebLogic Server?????????????WebLogic Server???????????????????·??????????????????????????????????????????????????????????(???)?????????????????????????????????Java EE???????????????????????·???????????????????·??????????????????????????????????·???????????????????????????????????WebLogic Server?????????????????????????·???????????????????????????????2??????????WebLogic Server???????????????????·????????????????????????????????WebLogic Server?????????????????????(???)???????????????????WebLogic Server???????“???”????????????????/???????????????????WebLogic Server???????????????????――???????WebLogic Server???????????????1???????????????????????????????????·????????????????????2011?11????????Oracle DBA & Developers Days 2011??????????????????????????WebLogic Server???????????????????????????????????????????????/?????????????????????????(???)????????????????/??????????????WebLogic Server???????????????????????????????????????????????????????????????????????????1???????????????????????????????????????????????????WebLogic Server???????????????????????????????????????????????????????????????????????·?????????????????????·??????????????????????????????????????????????????2011?11????????Oracle DBA & Developers Days 2011??????????????????????????WebLogic Server??????????????????WebLogic Server???????????????????????????????????????????????????·?????????????????????????????2??????????????????????????????????????????????·??????????(???)??????????JavaFX??Java???????·??????????????――?Java Developer Workshop #2?????????JavaFX??Java???????·??????????????――?Java Developer Workshop #2?????WebLogic Server?????????Java???????????????????WebLogic Channel?????????JavaOne 2011??Java/Java EE????????!――???????????????!!?????????????????????JavaOne 2011????????????????????????????????????JavaFX?????2011?12?1?????????????Java?????????????Java Developer Workshop #2????JavaOne 2011?JavaFX???????????????Oracle Corporation?JavaFX??????Nandini Ramani?(Client Java Group???????????)??????JavaFX 2.0-Next generation Java client solution????????????????????JavaFX?????????????????????(???)????????UFJ??????????????????????·?????WebLogic Server????????――????? ?????? ????? 2011???????UFJ??????????????????????·?????WebLogic Server????????――????? ?????? ????? 2011???????UFJ???????·?????IT????????UFJ???????????????(MUIT)?????UFJ?????????????????????????·????·????????????????????????WebLogic Server???????????????????·?????????IT?????????WebLogic Server??????? MUIT IT??????? ??????????2011?11?30???????????? ?????? ????? 2011??????????UFJ???????????????????Java EE???????WebLogic Server????????????????????(???)??????????????! ??????????????????WebLogic Server 12c?????????! ??????????????????WebLogic Server 12c????????2011?12?9??WebLogic Server????Oracle WebLogic Server 12c??????????????????12?1????????????????????·?????10????????Oracle OpenWorld 2011?????????????????????????????1?????????????????????????????????????????Oracle Corporation??????? ???·????????????·??????????????????????????????(???)??????????·???????! ?WebLogic Scripting Tool????WebLogic Server???/???????????·???????! ?WebLogic Scripting Tool????WebLogic Server???/???????Web???????????/?????????????????????????????????????????????? ??????????????????????????????????????????????????????????????????????????????WebLogic Server?????????????????WebLogic Scripting Tool??????????2011?11????????Oracle DAB & Developers Days 2011?????????????????????????!WebLogic Scripting Tool?????WLS???·????????????WebLogic Scripting Tool?????????????????(???)??????Java EE???????????!? ?Oracle ADF???????!!Java EE???????????!? ?Oracle ADF???????!!WebLogic Server???Java EE??????????????????????Oracle Application Development Framework(ADF)????????????Oracle ADF????????????????????????????????????????GUI?????????????????Web???????????????????????????????????????/??????????????????????Fusion Application???????/?????????Oracle ADF?????????Java EE????????????????????????????? Fusion Middleware?????????????????????????Oracle ADF???????????????(???)??????????:10?????Java EE???????WebLogic Server?????????:10?????Java EE???????WebLogic Server?????11?30?????????????????????2011??WebLogic Server ?????????????????????Oracle OpenWorld 2011????WebLogic Server?????????Oracle OpenWorld 2011????WebLogic Server?????????2011?10?2?~6??????????????????????Oracle OpenWorld 2011???????????????????????????????????????????????????WebLogic Server??????????????????????? Fusion Middleware?????? ???????? ?????????????????????????WebLogic Server??????????????????(???)???????JavaOne 2011??Java/Java EE????????!――???????????????!!?JavaOne 2011??Java/Java EE????????!――???????????????!!WebLogic Server??????????????????1??????Java/Java EE??????????????????????????????????Java????JavaOne???2011?10?2?~6?????????????????????JavaOne 2011????????????Java/Java EE?????????????????????????Java???????????????????JavaOne 2011??????????????(???)??????WebLogic?RAC????????????――Active GridLink for RAC?????????????4????WebLogic Suite 11g???????Active GridLink for RAC???Oracle Database???????????Oracle Real Application Clusters(RAC)??WebLogic Server??????????????????????????????????????????????????????????????·??????????Frances Zhao?(Oracle Application Server ??????·?????·?????)???????????????(???)??????????RAC??????????????????????????????????Oracle Database??????????????Oracle Real Application Clusters(RAC)????????????????????????????????????????????RAC????Oracle WebLogic Server????????????WebLogic Suite 11g?????????WebLogic Server/RAC???????Active GridLink for RAC????????????????????·??????????Frances Zhao?(Oracle Application Server ??????·?????·?????)???????????2??????????(???)????????JRockit Mission Control! ?????WebLogic?????????????????????????????????????Oracle WebLogic Server Enterprise Edition??????????????JRockit Mission Control??????OS??Web?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????JRockit Mission Control?????????????????????????????????????????Application Grid???????? ????????????????? ???(?????? Fusion Middleware?????? ???????????)??????????????????JRockit Mission Control?????????(???)???????????????OutOfMemory?????????????????WebLogic Server Enterprise Edition????????????JRockit Mission Control????????????????????????????????????????????????????????????????????????????????Application Grid???????? ????????????????? ???(?????? Fusion Middleware?????? ???????????)??????????????????JRockit Mission Control?????2?????(???)???????WebLogic & Java EE???????????????Java EE????WebLogic Server???????????20????????????????????????/???????????Java EE???WebLogic Server????????????????IT(????)?????????????????????????????????????/??????????????????????????????????????????/?????????????????????????2011?9?6???????????????????WebLogic & Java EE????????????????????????????Java EE?WebLogic Server????????????(???)???????????????????Java EE?????????????10????????????????????????·??????????????????????Java EE?????·?????????????·?????????IT??????????????????Java EE??????????????????????――2011?9?6????????WebLogic & Java EE????????????????????――Java EE???????????????????????????·??????????????????Java EE????????????????????????????????(???)??????Java???????????????????·?????Oracle Coherence??6??????????????Java API?????????????????????????·??????????/????·?????????????Java???????????????????????????????????????1??????????Java??????????·???????????????????????????????????????????????????????Java????????????????????????????????·???????Oracle Coherence????????????????????????????????????????????????Coherence??Java?????????????????????????????????????????????????????2??????Oracle Coherence?Java???????????????????????????????????(???)????????????????????????????????/????????????????????????·?????????????????????????????·???????Oracle Coherence??????Java???????????????????????????????????????????????????????????????????Java API??????Oracle Coherence???????????3????????????????????????Coherence???????????????????????????????3???????????(???)??????????????! ?????????????????JRockit Flight Recorder????????????! ?????????????????JRockit Flight Recorder???????????????????????????????????????????WebLogic Server????????·??????????????????????????????????????????????WebLogic Server????????????????????????????????????????????????????????????????????????JRockit Flight Recorder???WebLogic Server????????????????????????????????????????????????????????????????????????????????????????(???)??????????????????――???????/????????????????·??????????WebLogic Server?????Java+?????·??????????????????????????·???????????????????????????·???????????????????????????????????????WebLogic Server???????????????????????????? WebLogic Server??????·??????·???????????????????????????????????Publickey???????IT???????????????WebLogic Server??????????????????????????????????(???)???????????????????????????WebLogic Server??????????????????IT?????????????????·????????????????????????????????????????????????·???????????????????????????????????――??????Publickey???????IT?????????????????????????????????WebLogic Server????????????????????(???)????????????????????????????WebLogic Server????????·??????????――?????·??????·???????????WebLogic?????Java EE??????????·????????????????????????????·??????·??????????????WebLogic Server???????????????????????????????????????·???????????????????????????????????·???????????????????????????????????????WebLogic Server????????? ????????????????????????2??????????(???)???????????????????????????TCO?――????????????????WebLogic???????????????????/????????????????????????????·???????????????????????????????????????????????????????????WebLogic Server??????(????????)???????????????????????????Oracle Database??????????????????????TCO??????????????????·??????·??????????WebLogic Server???????????????????????(???)??????WebLogic Channel ?????WebLogic Channel ????? WebLogic?????Java EE ????????????????????WebLogic Channel???????????Java EE???????????·??????????????WebLogic Server ??????Tips???????????????????????????????????????????Oracle WebLogic Server??????Oracle WebLogic Server ??WebLogic Server?????????????·??·???????????????????????????????????????????" src="https://blogs.oracle.com/weblogic_channel/resource/images/wc2_directory.jpg"?Know How?WebLogic Server - ???????·???????WebLogic?????????????????????????know How?Oracle WebLogic Server 11g? JRuby?JMX???????WebLogic Server - JRuby?JMX?????[know How]Oracle WebLogic Server?JDBC GridLink????????????????·??????(MDS)?????????Oracle WebLogic Active GridLink for RAC?????????????Pick-Up???????WebLogic Server JDBC???·???????(10.3.4)Oracle WebLogic Server JDBC???·???(10.3.4)????????????????????????????Pick-Up????????????Web??????????Oracle WebLogic Server 11g?Microsoft .NET WCF 4.0????? ???????????????????????????????WebLogic Server?Microsoft .NET???????????????????????????Oracle WebLogic Server - JDBC??????JDBC????????????????????(????????????)????????????????????????????????????????????????????WebLogic Server - ????????/??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????WebLogic Server - ???????·??????Oracle WebLogic Server??Web???????????????????????????????????????????????????????????????????????????????????????????????????WebLogic Server - Web???????????Web??????????WebLogic???????????JAX-WS?????Web????????????????????????????????30?????WebLogic Server 11g????Oracle WebLogic Server 11g?????????????30??????????????????????WebLogic Server - Enterprise Grid Messaging WebLogic Server?Java EE?JMS???JMS????????????JMS??????????????????????????????????????????????????????????????????????Oracle WebLogic Server - GridLink for RAC 　JDBC??????????GridLink for RAC???????????????????????????Oracle???????????????????????·????! WebLogic Server ? Oracle Database ??????????????????????????????????????????????????????????????Oracle WebLogic Server ???????WebLogic Server???????????????????????????????????Java????????????????????????????????????????????????????????????????????????????????????　??????????????????WebLogic Server?????????????????????????????????????????????????????????????????????????????????????????·????????????WebLogic Server?????????????????????!WebLogic Server??????????????? ????·??·???????????????????????????????????????????????????????????? ??·?????????????????????? Oracle WebLogic Server 11g ??????WebLogic Server????????????????11g???????????????????? ???????????WebLogic Server(JRockit) - ???????????????????????????Oracle JRockit JVM????????????????????????????????????????JVM???????????????????????????????????????????????Pick-Up???????Oracle JDeveloper?Oracle ADF 11g?Release 2(11.1.2.0.0):???Oracle JDeveloper?Oracle ADF?11g Release 2(11.1.2.0.0)????????????Pick-Up???????Oracle JRockit????·????JRockit????·???????????????????????????????????????????????????????????????????JVM??????JRockit JVM?????????????????????????????????????????????????????????Pick-Up??????????? JVM ?JRockit????????·??????Oracle JRockit JVM?????????????????????·?????????????????????????JVM??????? ???????????????????????????????????????????????????????????????????????? ???????????????????????????????! ????JVM?JRockit????JVM?Oracle JRockit???????????????????????????????????Flight Recorder????????????????

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  • Annotate over Multi-table Inheritance in Django

    - by user341584
    I have a base LoggedEvent model and a number of subclass models like follows: class LoggedEvent(models.Model): user = models.ForeignKey(User, blank=True, null=True) timestamp = models.DateTimeField(auto_now_add=True) class AuthEvent(LoggedEvent): good = models.BooleanField() username = models.CharField(max_length=12) class LDAPSearchEvent(LoggedEvent): type = models.CharField(max_length=12) query = models.CharField(max_length=24) class PRISearchEvent(LoggedEvent): type = models.CharField(max_length=12) query = models.CharField(max_length=24) Users generate these events as they do the related actions. I am attempting to generate a usage-report of how many of each event-type each user has caused in the last month. I am struggling with Django's ORM and while I am close I am running into a problem. Here is the query code: ef usage(request): # Calculate date range today = datetime.date.today() month_start = datetime.date(year=today.year, month=today.month - 1, day=1) month_end = datetime.date(year=today.year, month=today.month, day=1) - datetime.timedelta(days=1) # Search for how many LDAP events were generated per user, last month baseusage = User.objects.filter(loggedevent__timestamp__gte=month_start, loggedevent__timestamp__lte=month_end) ldapusage = baseusage.exclude(loggedevent__ldapsearchevent__id__lt=1).annotate(count=Count('loggedevent__pk')) authusage = baseusage.exclude(loggedevent__authevent__id__lt=1).annotate(count=Count('loggedevent__pk')) return render_to_response('usage.html', { 'ldapusage' : ldapusage, 'authusage' : authusage, }, context_instance=RequestContext(request)) Both ldapusage and authusage are both a list of users, each user annotated with a .count attribute which is supposed to represent how many particular events that user generated. However in both lists, the .count attributes are the same value. Infact the annotated 'count' is equal to how many events that user generated, regardless of type. So it would seem that my specific authusage = baseusage.exclude(loggedevent__authevent__id__lt=1) isn't excluding by subclass. I have tried id_lt=1, id_isnull=True, and others. Halp.

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  • Scala Interpreter scala.tools.nsc.interpreter.IMain Memory leak

    - by Peter
    I need to write a program using the scala interpreter to run scala code on the fly. The interpreter must be able to run an infinite amount of code without being restarted. I know that each time the method interpret() of the class scala.tools.nsc.interpreter.IMain is called, the request is stored, so the memory usage will keep going up forever. Here is the idea of what I would like to do: var interpreter = new IMain while (true) { interpreter.interpret(some code to be run on the fly) } If the method interpret() stores the request each time, is there a way to clear the buffer of stored requests? What I am trying to do now is to count the number of times the method interpret() is called then get a new instance of IMain when the number of times reaches 100, for instance. Here is my code: var interpreter = new IMain var counter = 0 while (true) { interpreter.interpret(some code to be run on the fly) counter = counter + 1 if (counter > 100) { interpreter = new IMain counter = 0 } } However, I still see that the memory usage is going up forever. It seems that the IMain instances are not garbage-collected by the JVM. Could somebody help me solve this issue? I really need to be able to keep my program running for a long time without restarting, but I cannot afford such a memory usage just for the scala interpreter. Thanks in advance, Pet

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  • Help, my CentOS servers keep going down , No route to host after a random uptime [closed]

    - by user249071
    Hello , I have a couple of Centos linux servers, that have a very simple task, they run nginx + fastcgi for php , and some NFS mounts between them, readonly They have some RPC commands to start some downloading processes with wget, nothing fancy , from a main server, but their behavior is very unstable, they simply go down, we tried to monitor ram , processor usage, even network connections, they don't load up so much, max network connections up to... 250 max, 15% processor usage and memory , well, doesn't even fill up, 2.5GB from 8GB max , I have no ideea why can a linux server go down like that, they aren't even public servers, no domain names installed no public serving, for sites. The only thing that I've discovered was that if i didn't restart the network service every couple of hours or so... the servers were becoming very slow, starting apps very slow, but not repoting a high usage of resources...Maybe Centos doesn't free the timeout connections, or something like that...It's based on Red Hat right? I'm not a linux expert , but I'm sure that there are a few guys out there that can easily have an answer to this , or even have some leads to what i can do ... I haven't installed snort, or other things to view if we have some DOS attacks, still the scheduled script that restarts the network each hour should put the system back online, and it doesn't.... Thank you in advance

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  • Adding Mysql Columns in Rails Rake

    - by Gigg
    I have a rake file that does a series of calculations on a database. Basically it adds usage on equipment regularly. At the end of the day it needs to add that days total to a monthly total table and update that same table. i use the following simple concepts: To get data from the database is pretty simple: @usages = Usage.find(:all) time = Time.new for usage in @usages sql = ActiveRecord::Base.connection To insert it into the database: sql.execute "INSERT (or UPDATE) into usages ## add values and options as per MySQL But how do I: take a column from a database, add all of its values together that have a common value in another column, (i.e. if column x == value y) and then insert it into another column in another table, say dailyusages? I have tried these options: task (:monthly => :environment) do @dailyusages = Dailyusage.find(:all) for dailyusage in @dailyusages sql = ActiveRecord::Base.connection time = Time.new device = monthlyusages.device month = time.month if device == dailyusages.device ##&& month == dailyusages.month total = (dailyusage.total.sum.to_i) @monthlyusages = Monthlyusage.find(:all) for monthlyusage in @monthlyusages sql = ActiveRecord::Base.connection old_total = monthlyusage.total.to_i new_total = (old_total + total) sql.execute "UPDATE monthlyusages ( year, month, total, device ) values('#{time.year}', '#{time.month}', '#{total}', '#{dailyusage.device}' )" end I obviously have uncommented options and tried all sorts of things. Any help would really save me a load of trouble. Thanks in advance. (** BTW - I am new to rails, so go easy on me **)

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  • Using CGContextDrawTiledImage at different zooms causes massive memory growth

    - by Jacques
    I'm working on app an where there's a view in a zoomable UIScrollView. When the user zooms in or out, I redraw the view that's in the UIScrollView to be nice and sharp. That view has a background image that I draw with CGContextDrawTiledImage. I noticed that memory usage grows every time I switch to a new zoom level. It looks like CGContextDrawTiledImage keeps a cache somewhere of the image scaled to different sizes. So, If I go from 1.0 to 1.1x zoom, memory use grows. Going back to 1.0 doesn't cause it to grow, but then going to 1.05 and then 1.2 causes it to grow twice. Back to 1.1 and no growth. Of course, the zoom level is under user control so I don't have control over how many zoom levels happen. Right now my background image is kind of massive (512x512), so this causes memory usage to grow very quickly. It doesn't show up as a memory leak in Instruments, just additional allocations that never get freed. I've tried to find a way to free the cache that appears to be being created, but no luck. It doesn't seem to respond to low memory warnings, for example. I also tried setting the view's backgroundColor to a UIColor created with colorWithPatternImage, but that doesn't work because I'm doing the scaling by changing the graphics context's CTM, not by setting the view's transform. Any ideas on how to keep memory usage from blowing up?

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  • SQL Compact performance on device

    - by Ben M
    My SQL Compact database is very simple, with just three tables and a single index on one of the tables (the table with 200k rows; the other two have less than a hundred each). The first time the .sdf file is used by my Compact Framework application on the target Windows Mobile device, the system hangs for well over a minute while "something" is done to the database: when deployed, the DB is 17 megabytes, and after this first usage, it balloons to 24 megs. All subsequent usage is pretty fast, so I'm assuming there's some sort of initialization / index building going on during this first usage. I'd rather not subject the user to this delay, so I'm wondering what this initialization process is and whether it can be performed before deployment. For now, I've copied the "initialized" database back to my desktop for use in the setup project, but I'd really like to have a better answer / solution. I've tried "full compact / repair" in the VS Database Properties dialog, but this made no difference. Any ideas? For the record, I should add that the database is only read from by the device application -- no modifications are made by that code.

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  • C Programming. How to deep copy a struct?

    - by user69514
    I have the following two structs where "child struct" has a "rusage struct" as an element. Then I create two structs of type "child" let's call them childA and childB How do I copy just the rusage struct from childA to childB? typedef struct{ int numb; char *name; pid_t pid; long userT; long systemT; struct rusage usage; }child; typedef struct{ struct timeval ru_utime; /* user time used */ struct timeval ru_stime; /* system time used */ long ru_maxrss; /* maximum resident set size */ long ru_ixrss; /* integral shared memory size */ long ru_idrss; /* integral unshared data size */ long ru_isrss; /* integral unshared stack size */ long ru_minflt; /* page reclaims */ long ru_majflt; /* page faults */ long ru_nswap; /* swaps */ long ru_inblock; /* block input operations */ long ru_oublock; /* block output operations */ long ru_msgsnd; /* messages sent */ long ru_msgrcv; /* messages received */ long ru_nsignals; /* signals received */ long ru_nvcsw; /* voluntary context switches */ long ru_nivcsw; /* involuntary context switches */ }rusage; I did the following, but I guess it copies the memory location, because if I changed the value of usage in childA, it also changes in childB. memcpy(&childA,&childB, sizeof(rusage)); I know that gives childB all the values from childA. I have already taken care of the others fields in childB, I just need to be able to copy the rusage struct called usage that resides in the "child" struct.

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  • parse a special xml in python

    - by zhaojing
    I have s special xml file like below: <alarm-dictionary source="DDD" type="ProxyComponent"> <alarm code="402" severity="Alarm" name="DDM_Alarm_402"> <message>Database memory usage low threshold crossed</message> <description>dnKinds = database type = quality_of_service perceived_severity = minor probable_cause = thresholdCrossed additional_text = Database memory usage low threshold crossed </description> </alarm> ... </alarm-dictionary> I know in python, I can get the "alarm code", "severity" in tag alarm by: for alarm_tag in dom.getElementsByTagName('alarm'): if alarm_tag.hasAttribute('code'): alarmcode = str(alarm_tag.getAttribute('code')) And I can get the text in tag message like below: for messages_tag in dom.getElementsByTagName('message'): messages = "" for message_tag in messages_tag.childNodes: if message_tag.nodeType in (message_tag.TEXT_NODE, message_tag.CDATA_SECTION_NODE): messages += message_tag.data But I also want to get the value like dnkind(database), type(quality_of_service), perceived_severity(thresholdCrossed) and probable_cause(Database memory usage low threshold crossed ) in tag description. That is, I also want to parse the content in the tag in xml. Could anyone help me with this? Thanks a lot!

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  • how to create an object using self?

    - by Nick
    I thought I understood the use of self while referring to anything in the current class. After encountering this warning and subsequent run failure, I have googled many variants of "define self" or "usage of self" and gotten nowhere. This problem is how to create an object without the warning, and understand why. #import <Cocoa/Cocoa.h> @interface Foo : NSObject { Foo *obj; } -(void)beta; @end #import "Foo.h" @implementation Foo -(void)beta{ obj = [self new]; // 'Foo' may not respond to '-new' } @end Note, if I substitute Foo for self, there's no problem. I thought the class name and self were equivalent, but obviously the compiler doesn't think so. Perhaps an explanation of what's wrong here will not only solve my problem but also enlighten my understanding of the usage of self. Are there any tutorials about proper usage of self? I couldn't find anything beyond something like "self is the receiver of the message," which I didn't help me at all.

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  • What's the point of indicating AllowMultiple=false on an abstract Attribute class?

    - by tvanfosson
    On a recent question about MVC attributes, someone asked whether using HttpPost and HttpDelete attributes on an action method would result in either request type being allowed or no requests being allowed (since it can't be both a Post and a Delete at the same time). I noticed that ActionMethodSelectorAttribute, from which HttpPostAttribute and HttpDeleteAttribute both derive is decorated with [AttributeUsage(AttributeTargets.Method, AllowMultiple = false, Inherited = true)] I had expected it to not allow both HttpPost and HttpDelete on the same method because of this, but the compiler doesn't complain. My limited testing tells me that the attribute usage on the base class is simply ignored. AllowMultiple seemingly only disallows two of the same attribute from being applied to a method/class and doesn't seem to consider whether those attributes derive from the same class which is configured to not allow multiples. Moreover, the attribute usage on the base class doesn't even preclude your from changing the attribute usage on a derived class. That being the case, what's the point of even setting the values on the base attribute class? Is it just advisory or am I missing something fundamental in how they work? FYI - it turns out that using both basically precludes that method from ever being considered. The attributes are evaluated independently and one of them will always indicate that the method is not valid for the request since it can't simultaneously be both a Post and a Delete.

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  • VB.Net Memory Issue

    - by Skulmuk
    We have an application that has some interesting memory usage issues. When it first opens, the program uses aroun 50-60MB of memory. This stays consistent on 32-bit machines. On 64-bit machines, however, re-activating the form in any way (clicking, dragging, alt-tabbing, etc.) adds around another 50MB to it's memory usage. It repeats this process several times before resetting back to around 45MB, at which point the cycle begins again. I've done some research and a lot of people have said that VB in general has pretty poor garbage collection, which could be affecting the software in some way. However, I've yet to find a solution. There are no events fired when the application is activated (as shown by 32-bit usage) - the applications is merely sitting awaiting the user's actions. At load, the system pulls some data into a tree view, but that's the only external connection, and it only re-fires the routine when the user makes a change to something and saves the change. Has anyone else experienced anything this strange, and if so, does anyone know of what might fix it? It seems strange that it only occurs under x64 systems. Thanks

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  • Configuration management in support of scientific computing

    - by Sharpie
    For the past few years I have been involved with developing and maintaining a system for forecasting near-shore waves. Our team has just received a significant grant for further development and as a result we are taking the opportunity to refactor many components of the old system. We will also be receiving a new server to run the model and so I am taking this opportunity to consider how we set up the system. Basically, the steps that need to happen are: Some standard packages and libraries such as compilers and databases need to be downloaded and installed. Some custom scientific models need to be downloaded and compiled from source as they are not commonly provided as packages. New users need to be created to manage the databases and run the models. A suite of scripts that manage model-database interaction needs to be checked out from source code control and installed. Crontabs need to be set up to run the scripts at regular intervals in order to generate forecasts. I have been pondering applying tools such as Puppet, Capistrano or Fabric to automate the above steps. It seems perfectly possible to implement most of the above functionality except there are a couple usage cases that I am wondering about: During my preliminary research, I have found few examples and little discussion on how to use these systems to abstract and automate the process of building custom components from source. We may have to deploy on machines that are isolated from the Internet- i.e. all configuration and set up files will have to come in on a USB key that can be inserted into a terminal that can connect to the server that will run the models. I see this as an opportunity to learn a new tool that will help me automate my workflow, but I am unsure which tool I should start with. If any member of the community could suggest a tool that would support the above workflow and the issues specific to scientific computing, I would be very grateful. Our production server will be running Linux, but support for OS X would be a bonus as it would allow the development team to setup test installations outside of VirtualBox.

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  • Configuration management in support of scientific computing

    - by Sharpie
    For the past few years I have been involved with developing and maintaining a system for forecasting near-shore waves. Our team has just received a significant grant for further development and as a result we are taking the opportunity to refactor many components of the old system. We will also be receiving a new server to run the model and so I am taking this opportunity to consider how we set up the system. Basically, the steps that need to happen are: Some standard packages and libraries such as compilers and databases need to be downloaded and installed. Some custom scientific models need to be downloaded and compiled from source as they are not commonly provided as packages. New users need to be created to manage the databases and run the models. A suite of scripts that manage model-database interaction needs to be checked out from source code control and installed. Crontabs need to be set up to run the scripts at regular intervals in order to generate forecasts. I have been pondering applying tools such as Puppet, Capistrano or Fabric to automate the above steps. It seems perfectly possible to implement most of the above functionality except there are a couple usage cases that I am wondering about: During my preliminary research, I have found few examples and little discussion on how to use these systems to abstract and automate the process of building custom components from source. We may have to deploy on machines that are isolated from the Internet- i.e. all configuration and set up files will have to come in on a USB key that can be inserted into a terminal that can connect to the server that will run the models. I see this as an opportunity to learn a new tool that will help me automate my workflow, but I am unsure which tool I should start with. If any member of the community could suggest a tool that would support the above workflow and the issues specific to scientific computing, I would be very grateful. Our production server will be running Linux, but support for OS X would be a bonus as it would allow the development team to setup test installations outside of VirtualBox.

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  • Insufficient storage available to create shadow copy

    - by Bob.at.SBS
    I have used the "Windows 7 File Recovery" tool under Windows 8 to create system image backups to an external USB hard drive. I built a new Windows 8.1 machine, and I want to create my first system image backup of that machine to the same USB hard drive. The "Windows 7 File Recovery" tool is gone in Windows 8.1, but wbAdmin is alive and well: wbAdmin start backup -backupTarget:\\?\Volume{2a2b...994f} -allCritical -quiet fails with this text displayed: wbadmin 1.0 - Backup command-line tool (C) Copyright 2013 Microsoft Corporation. All rights reserved. Retrieving volume information... This will back up (EFI System Partition),(C:),Recovery (300.00 MB) to \?\Volume {2a2b1255-3a86-11e3-be86-b8ca3a83994f}. The backup operation to F: is starting. Creating a shadow copy of the volumes specified for backup... Summary of the backup operation: The backup operation stopped before completing. The backup operation stopped before completing. Detailed error: ERROR - A Volume Shadow Copy Service operation error has occurred: (0x8004231f) Insufficient storage available to create either the shadow copy storage file or other shadow copy data. The EFI System Partition is 100 MB The Recovery Partition is 300 MB The C partition is 1.72 TB, NTFS, 218 GB used, 1.51 TB free The destination drive is 1.81 TB, NTFS, 678 GB used, 1.15 TB free I've fiddled with vssadmin resize shadowstorage, with no change in the error. vssadmin list shadowstorage displays: Shadow Copy Storage association For volume: (C:)\?\Volume{37a0...263}\ Shadow Copy Storage volume: (C:)\?\Volume{37a0...263}\ Used Shadow Copy Storage space: 2.39 GB (0%) Allocated Shadow Copy Storage space: 2.81 GB (0%) Maximum Shadow Copy Storage space: 531 GB (30%) Shadow Copy Storage association For volume: (F:)\?\Volume{2a2...94f}\ Shadow Copy Storage volume: (F:)\?\Volume{2a2...94f}\ Used Shadow Copy Storage space: 334 GB (17%) Allocated Shadow Copy Storage space: 337 GB (18%) Maximum Shadow Copy Storage space: UNBOUNDED (922154758%) (Yeah, the "percent calculation" for UNBOUNDED is seriously bogus.) I've run SFC /verifyonly and it seems happy. I've verified that the new `Volume Shadow Copy" service starts when I start the backup operation. Any suggestions?

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  • mysql_tzinfo_to_sql missing on my system

    - by Sk1ppeR
    I ran into problem with timezones within MySQL. Long story short, my application is worldwide, and each database has it's own timezone set within the application (not the server) in the way of "Europe/Berlin", "Europe/Vienna", "America/Sao Paulo". Obviously this is unacceptable for MySQL at first per connection. I read that it handles data better if you use UTC offsets. Basically my goal is to log a field's alteration in another table using a trigger. For that I use UNIX_TIMESTAMP within the trigger. Although UNIX_TIMESTAMP() follows the global timezone for the server which obviously bothers me a lot :| So I went to search for a "per connection" solution to use inside the trigger and well I found that mysql_tzinfo_to_sql can actually import zone info (UTC offsets) from my linux's zoneinfo files. Although to my amuse, when I ran the commant I got the following: bash: mysql_tzinfo_to_sql: command not found So I'm looking for a solution to fix that. I don't want to "map" the timezone names into UTC offset just so I could use in the trigger. Is there an alternative tool? Or at least sources for this one in particular only? What kind of queries does this tool generates so I could do it manually then if there is no alternative tool. Thanks in advance on any help on the issue! P.S: The OS is Debian GNU/Linux 6.0 and the MySQL server is the one from aptitude with performance tweaks with my.cnf

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  • MMC crashes on Windows Server 2008 x64 - Exchange console, event viewer

    - by David M Williams
    Help! I don't know what happened; this server has been very reliable but suddenly began having problems with a particular .NET 2.0 web site simply hanging - it wouldn't load at all. However, another ASP.NET site was still fine. Reinstalling the site didn't fix it, nor did deleting and re-creating the application within IIS. Trying the event viewer was met with a horrifying "Microsoft Management Console has stopped working". Some Googling led me to believe the .NET framework was the problem. I found a tool called the .NET cleanup tool - http://blogs.msdn.com/astebner/pages/8904493.aspx - which cleaned out .NET entirely. I reinstalled .NET 1.1 and 3.5 (which installed 2.0 and 3.0 as well). Using the .NET verification tool - http://blogs.msdn.com/astebner/pages/8999004.aspx - I believe these have all installed ok. However, my server is in worse shape now. The Exchange 2010 Management Console crashes with an MMC error and now my other (previously reliable) .NET web app now hangs on loading too. I thought I should use Computer Management to remove and re-add the application and web server roles but sure enough, MMC crashes. If anyone can help I will be extremely grateful. Thank you !

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  • How to avoid Windows Genuine Advantage for an XP update?

    - by hlovdal
    I am about to apply updates to a windows xp installation I have not booted in a couple of years. When going to update.microsoft.com, it forced me first to accept an activex installation and now it wants me to install wga: Windows Update To use this latest version of Windows Update, you will need to upgrade some of its components. This version provides you with the following enhancements to our service: <... useless list of "advantages" ... Details Windows Genuine Advantage Validation Tool (KB892130) 1.1 MB , less than 1 minute The Windows Genuine Advantage Validation Tool enables you to verify that your copy of Microsoft Windows is genuine. The tool validates your Windows installation by checking Windows Product Identification and Product Activation status. Update for Windows XP (KB898461) 477 KB , less than 1 minute This update installs a permanent copy of Package Installer for Windows to enable software updates to have a significantly smaller download size. The Package Installer facilitates the install of software updates for Microsoft Windows operating systems and other Microsoft products. After you install this update, you may have to restart your system. Total: 1.5 MB , less than 1 minute I have heard nothing but bad things about wga, and I absolutely do not want it installed on my system (this answer seems to give some options). Searching for "windows xp" at microsoft's web pages brought up this page which says Windows XP Service Pack 3 Network Installation Package for IT Professionals and Developers Brief Description This installation package is intended for IT professionals and developers downloading and installing on multiple computers on a network. If you're updating just one computer, please visit Windows Update at http://update.microsoft.com . ... File Name: WindowsXP-KB936929-SP3-x86-ENU.exe I am currently downloading this file. Will installing this bring my installation up to date with security updates? What about later updates whenever a new problem is discovered, how can i update without using wga?

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  • On a failing hard drive, I am able to view data but unable to copy it - why?

    - by Tom
    I have a 2.5" external hard drive that is failing. It's not making the expected 'clicking' noise that most hard drives and I am able to view the data, but I am unable to actually retrieve the data. I attempted to use SpinRite in order to access the data on the drive, but it didn't like the external drive. When I view the drive's property page, the drive shows that it's used space is at 100% and that it has 0 bytes available; however, the progress indicator under the drive icon in Windows Explorer shows that it's roughly 50% full (which is correct). When I attempt to run Windows' "Error Checking" tool and attempt to "scan for an attempt recovery of bad sectors," the tool begins to run then immediately closes with no error message. I am able to browse the contents of the drive using Windows Explorer. When I begin to try copying any given single file, the copy process begins, an indicator starts, and then the copy fails with no real error message. The Disk Management page in Computer Management under Control Panel also shows this drive has being 'Healthy.' I dropped the drive off at a data recovery store and they said that "The data seems to be intact, but an internal failure is preventing any information from being retrieved." They offered to provide me references to a data recovery specialist. I've also attempted to run CHKDSK on the drive (with and without arguments) but it returns the following error: The type of the filesystem is RAW. CHKDSK is not available for RAW drives. Before going the route of more expensive data recovery, I'm wondering if these symptoms sound familiar to anyone? Other questions... I'm willing to continue trying tools such as TestDisk and/or PhotoRec (as the majority of the data that I'd like to salvage are photos) but how long I should expect either tool to run given approximately 400GB of data? I'm also comfortable using Linux so I welcome any suggestions for utilities or tools and strategies with which you've had success.

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  • Easy line break removal from text fields and/or selections

    - by AmV
    I'm looking for a tool that allows me to easily re-wrap text (i.e. remove line breaks, but not paragraph breaks from a text selection or the current text field that is being edited), and that works at least with text fields in my browser (Chrome) and on Windows. Bonus points for anything that works outside the browser, and that works in-place (i.e. that doesn't require copy-pasting the text through a separate window or using something like http://www.textfixer.com/tools/remove-line-breaks.php) Browser extensions, GreaseMonkey scripts or applications that also work on Linux and/or Mac (or even better, that are multi-platform) are all welcomed. Here is an example of how the tool should behave. If I have the following in a text field: This is a test for SuperUser.com. This is a test for SuperUser.com. This is a test for SuperUser.com. This is a test for SuperUser.com This is a test for SuperUser.com. This is a test for SuperUser.com. This is a test for SuperUser.com. This is a test for SuperUser.com I'd like to have an easy tool that allows me to, for example, select the text, and with a keyboard shortcut convert it to: This is a test for SuperUser.com. This is a test for SuperUser.com. This a test for SuperUser.com. This is a test for SuperUser.com This is a test for SuperUser.com. This is a test for SuperUser.com. This a test for SuperUser.com. This is a test for SuperUser.com Thanks in advance!

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  • Syncronization between folders MAC OS Lion

    - by Andre Carvalho
    I have an iMac at home and I use a Macbook pro for work. I also have a time capsule at home containing my main folder with my main files. I use it as a NAS besides the Time Machine backup tool. I have several personal files I need to be accessing both at home and at work. My wife, who works at home, uses sometimes the same .XLS files and .DOC files I might have used during my day at work, away from home. My question is: Is there a software, or tool that a I can use to sync my iMac and my MB Pro folders? Remembering that: There might be a chance that my wife and I have changed the same files during the day, so the files would have to be merged so none of the information added by either me or my wife would be lost. The software/tool that would be installed on the MB Pro would need to mount the Time Capsule volume so it could locate the main folder on it. It has to be done automatically when my MB is at home ( with a schedule option ); I have tested some softwares like synctwofolders and Chronosync but none fulfilled all my needs. The first couldn't mount the Time Capsule Volume and didn't have the many schedule options. I really liked Chronosync, but it doesn't merge the files. When it detects a conflict ( for instance: my wife changed a .DOC file on the iMAC and I changed the same file on the MB it asks you to choose which version you want to keep instead of allowing you simply to merge them ). I don't have much experience with automator or scripts but maybe you can give me a hand with that.

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