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  • Why is an oracle sequence named hibernate_sequence being created with JPA using Hibernate with the O

    - by JavaRocky
    All my entities use this type of @Id @Id @GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "MYENTITY_SEQ") @SequenceGenerator(name = "MYENTITY_SEQ", sequenceName = "MYENTITY_SEQ") @Column(name = "MYENTITY", nullable = false) private Long id; Or @Id @Column(name = "MYENTITY") I find that an oracle sequence named hibernate_sequence is always created. Why is this so? And how can i avoid this? I am using JPA1 with Hibernate 3 and the Oracle 10g dialect.

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  • Daemon program that uses select() inside infinite loop uses significantly more CPU when ported from

    - by Jake
    I have a daemon app written in C and is currently running with no known issues on a Solaris 10 machine. I am in the process of porting it over to Linux. I have had to make minimal changes. During testing it passes all test cases. There are no issues with its functionality. However, when I view its CPU usage when 'idle' on my Solaris machine it is using around .03% CPU. On the Virtual Machine running Red Hat Enterprise Linux 4.8 that same process uses all available CPU (usually somewhere in the 90%+ range). My first thought was that something must be wrong with the event loop. The event loop is an infinite loop ( while(1) ) with a call to select(). The timeval is setup so that timeval.tv_sec = 0 and timeval.tv_usec = 1000. This seems reasonable enough for what the process is doing. As a test I bumped the timeval.tv_sec to 1. Even after doing that I saw the same issue. Is there something I am missing about how select works on Linux vs. Unix? Or does it work differently with and OS running on a Virtual Machine? Or maybe there is something else I am missing entirely? One more thing I am sure sure which version of vmware server is being used. It was just updated about a month ago though. Thanks.

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  • What Date Format Should I Send When Using Oracle.DataAcess.

    - by discwiz
    Converting from usind Micorsofts Syste.Data.OracleClient to what I believe is called Oracles ODT (Oracle.DataAccess 10.2.0.100). When I try and send a date I get this error "ORA-1858: a non-numeric character was found where a numeric was expected". This code worked great using System.Data.OracleClient. cmd.Parameters.Add(New OracleParameter("I_FIRST_LOSS_EVENT_DATE", OracleDbType.Date)).Value = .LossEventsMessages(0).LossEventTime Thanks, Dave

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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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  • Display query results like \G in MySQL when using Oracle / sqlplus?

    - by jed79
    In MySQL, you can use \G to run a query: select * from mytable\G And your results will be displayed in an inverted table, kinda like this: *************************** 1. row *************************** column1: 12345 another_colum: another value yet_another: ABCD *************************** 2. row *************************** column1: 238479 another_colum: another value again yet_another: WXYZ Is there any way to get a similar format using Oracle / sqlplus?

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  • devArt's dotConnect for Oracle vs. ODP.net/OCI performanc.

    - by Sieg
    Does anybody have any experience going from ODP.net to devArt's dotConnect for Oracle? Some initial testing is showing Direct Connect in 64bit dotConnect running 30% slower at times than our original ODP.net/OCI 32 bit solution. Trying to determine if that's normal or if something may be wrong in my testing approach. Thanks!

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  • How to identify what locked PL/SQL package (Oracle 10.0.4.2)?

    - by Roman Kagan
    I was trying to recompile PL/SQL package and no avail. because something obtained the lock and that wasn't released for long time. As soon as I kill all sessions I was able to recompile but encounter the same behavior (i.e. locked package) and I wonder what tools are avail to identify what could of obtain it and never release it? This happen on (Oracle 10.0.4.2). Greatly appreciate for your help.

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  • Are products like SQL Server and Oracle are "ORDBMS"?

    - by n10i
    According to wikipedia! http://en.wikipedia.org/wiki/ORDBMS IBM's DB2, Oracle database, and Microsoft SQL Server, make claims to support this technology and do so with varying degrees of success So, are these products true "ORDBMS" like PostgreSQL? or they are they are long way from it? can someone plz! point me to any link where i can read about the features still to be implemented by these RDBMS to become true ORDBMS!

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  • Need a way to determine if a file is done being written to.

    - by Khorkrak
    The situation I'm in is this - there's a process that's writing to a file, sometimes the file is rather large say 400 - 500MB. I need to know when it's done writing. How can I determine this? If I look in the directory I'll see it there but it might not be done being written. Plus this needs to be done remotely - as in on the same internal LAN but not on the same computer and typically the process that wants to know when the file writing is done is running on a Linux box with a the process that's writing the file and the file itself on a windows box. No samba isn't an option. xmlrpc communication to a service on that windows box is an option as well as using snmp to check if that's viable. Ideally Works on either Linux or Windows - meaning the solution is OS independent. Works for any type of file. Good enough: Works just on windows but can be done through some library or whatever that can be accessed with Python. Works only for PDF files. Current best idea is to periodically open the file in question from some process on the windows box and look at the last bytes checking for the PDF end tag and accounting for the eol differences because the file may have been created on Linux or Windows.

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  • Using Oracle Sequence in SQL Loader?

    - by Sujee
    Hi, I am using SEQUENCE keyword in SQL Loader control file to generate primary keys. But for a special scenario I would like to use Oracle sequence in the control file. The Oracle documentation for SQL Loader doesn't mentioned anything about it. does SQL Loader support it?

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  • How can I sum number of rows of a table in SQL ORACLE?

    - by Christian Magro
    Dear community I have the follow instruction on SQL ORACLE: SELECT COUNT(FE_DAY) FROM TI_DATE WHERE (FE_MO = 02 AND FE_YEAR in ('2011', '2012')) GROUP BY FE_DAY In this instruction effectively obtain like SQL Answer a list of number that they sum=10 .But How can I don't show rows .I need only show the row's sum=10 I tried to apply the follow SQL instruction also: SELECT SUM(COUNT(FE_DAY)) FROM TI_DATE WHERE (FE_MO = 02 AND FE_YEAR in ('2011', '2012')) GROUP BY FE_DAY But the answer was 57, different of the number of rows, that I need.

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  • How to: Simulating keystroke inputs in shell to an app running in an embedded target

    - by fzkl
    I am writing an automation script that runs on an embedded linux target. A part of the script involves running an app on the target and obtaining some data from the stdout. Stdout here is the ssh terminal connection I have to the target. However, this data is available on the stdout only if certain keys are pressed and the key press has to be done on the keyboard connected to the embedded target and not on the host system from which I have ssh'd into the target. Is there any way to simulate this? Edit: Elaborating on what I need - I have an OpenGL app that I run on the embedded linux (works like regular linux) target. This displays some graphics on the embedded system's display device. Pressing f on the keyboard connected to the target outputs the fps data onto the ssh terminal from which I control the target. Since I am automating the process of running this OpenGL app and obtaining the fps scores, I can't expect a keyboard to be connected to the target let alone expect a user to input a keystroke on the embedded target keyboard. How do I go about this? Thanks.

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  • Qt Creator CONFIG (debug, release) switches does NOT work

    - by killdaclick
    Problem: CONFIG(debug,debug|release) and CONFIG(release,deubg|release) are always evaluated wherever debug or release is choosen in Qt Creator 2.8.1 for Linux. My configuration in Qt Creator application (stock - default for new project): Projects->Build Settings->Debug Build Steps: qmake build configuration: Debug Effective qmake call: qmake2 proj.pro -r -spec linux-gnueabi-oe-g++ CONFIG+=debug Projects->Build Settings->Release Build Steps: qmake build configuration: Release Effective qmake call: qmake2 proj.pro -r -spec linux-gnueabi-oe-g++ My configuration in proj.pro: message(Variable CONFIG:) message($$CONFIG) CONFIG(debug,debug|release) { message(Debug build) } CONFIG(release,debug|release) { message(Release build) } Output on console for Debug: Project MESSAGE: Variable CONFIG: Project MESSAGE: lex yacc warn_on debug uic resources warn_on release incremental link_prl no_mocdepend release stl qt_no_framework debug console Project MESSAGE: Debug build Project MESSAGE: Release build Output on console for Release: Project MESSAGE: Variable CONFIG: Project MESSAGE: lex yacc warn_on uic resources warn_on release incremental link_prl no_mocdepend release stl qt_no_framework console Project MESSAGE: Debug build Project MESSAGE: Release build Under Windows 7 I didnt experienced any problem with such .pro configuration and it worked fine. I was desperate and modified .pro file: CONFIG = test message(Variable CONFIG:) message($$CONFIG) CONFIG(debug,debug|release) { message(Debug build) } CONFIG(release,debug|release) { message(Release build) } and I was suprised with the output: Project MESSAGE: Variable CONFIG: Project MESSAGE: test Project MESSAGE: Debug build Project MESSAGE: Release build so even if I completly clean CONFIG variable it still see debug and release configuration. What Im doing wrong?

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