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• Ubuntu/Linux version recommendation for HP dv6 3122TX?

  - by sanjayav

  I purchased a HP dv6 3122TX recently and after installing Ubuntu 10.10 64 bit I ran into multiple issues like, The wireless driver is not supported by Uubntu. (1) [The driver is RaLink RT3090 ] The ethernet stopped working sometimes for no reason [The driver is Realtek RTL8111/8168B ] "Corrupted low memory at ..." issue which is described as a kernel bug in Ubuntu support forums. (It started to take me to a terminal instead of the GUI and couldn't start x server after that) As I'm not an expert Ubuntu user I got fed up of all these issue and got back to Windows 7. But I need an Ubuntu installation up and running for my development work. What are your suggestions about a reasonable Ubuntu version that I should try? Or a different Linux variation? Should I stick to a 32-bit version? It'd be great anyone can give some advice on this issue.

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• Windows 7 x64 Hard Freezing (again)

  - by Lanissum

  Awhile ago, my computer was randomly freezing a few minutes after booting, and I ended up replacing the CPU and mobo after testing the RAM and hard drive, I also couldn't find anything wrong with the video card. So after replacing the presumably faulty hardware, everything worked fine for about a month and a half. All of a sudden, My computer is randomly freezing a few minutes after loading up any intensive application (games, mostly). Most of the time it just freezes with the current frame until I hard reset, although once it printed a BSOD message stating that dxgmms1.sys was to blame. The only difference between these two episodes I can think of is that I can do word/internet/work without issue now, as opposed to the near uselessness my computer was rendered last time. For those of you who want to know, I tested my memory with memtest86 (for 64 bit machines). I can't figure out what could have started this latest round of issues, the event logger just states that a kernel-power event has occurred (like last time) but I think thats just a generic "this machine has rebooted after a sudden shutdown" message.

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• Shuttle FB51 mobo does not boot with external USB drive attached [closed]

  - by user127236

  I am repurposing an old Alienware desktop as a home media server. The PC is based on the Shuttle FB51 motherboard. The BIOS is a Phoenix Version 6.00 PG, release date 12/16/2002. I have loaded Ubuntu 12.04 LTS on the internal hard drive. I am using a Western Digital WD Elements 1.5 TB USB 2.0 Desktop External Hard Drive for media storage. When the external drive is plugged in and the PC is powered on, it freezes very early in the BIOS self-test, even before it begins the memory test. If I unplug the drive, the self-test proceeds without further problems. I can plug the USB drive back in when the self-test is complete, and Ubuntu will boot and find the external drive normally. I've tried several changes to the BIOS setup without finding a cure for the boot issue. Any assistance gratefully accepted. JGB

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• What is bottleneck of my Apache server ?

  - by rrh

  $netstat -anp | grep :80 | grep TIME_WAIT | wc -l 840 $netstat -anp |grep :80 | grep ESTABLISHED | wc -l 50 memory usage : 850MB / 1000MB apache2.conf contains.. <IfModule mpm_prefork_module> StartServers 5 MinSpareServers 5 MaxSpareServers 10 MaxClients 150 MaxRequestsPerChild 0 </IfModule> <IfModule mpm_worker_module> StartServers 2 MinSpareThreads 25 MaxSpareThreads 75 ThreadLimit 64 ThreadsPerChild 25 MaxClients 150 MaxRequestsPerChild 0 </IfModule> <IfModule mpm_event_module> StartServers 2 MaxClients 150 MinSpareThreads 25 MaxSpareThreads 75 ThreadLimit 64 ThreadsPerChild 25 MaxRequestsPerChild 0 </IfModule> Are there any configuration changes that can help me or its just my RAM the bottleneck here? Urgent help needed..!!

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• How to benchmark kernel (-Os vs -O2)

  - by NightwishFan

  It seems logical to me that on a 64-bit kernel compiling it to optimize for size might help overall. (My distro of choice uses -O2) It has the benefits of more registers and memory and perhaps less cache contention than normal optimized code. I have a kernel compiled like this and it seems excellent. However my question is how can I prove this? I like using Phoronix for "real world" sort of benchmarks so I would prefer to test cases like that. What should I pick to test? Does anyone else have any alternatives? Thank you very much in advance.

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• nagiosgraph new services not showing

  - by Eleven-Two

  I am using Nagios Core with Nagiosgraph and had only enabled graphing for cpu usage for a while. This worked fine, but now i wanted to add some more services (for example memory usage). The new services are not working (no rrd data is generated). The Nagiosgraph site only says "no data available" and I get no error in apache log, nagiosgraph.log or nagiosgraph-cgi.log. The new services are standard services (nsclient++ MEMUSE for example) and of course they are included in the map file. If I execute the checks manually, it shows also the perfdata. I added the services by enabling the "graphed-service" use. Did I miss something?

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• Warming up an IIS Application Pool automatically?

  - by Michael Stum

  So IIS likes to shut down app pools that aren't in use. While this makes sense, I would like to have certain app pools conterminously running, but I don't want to just disable the automatic app pool restart as some of the settings (e.g., maximum memory limit) are good to have. I know that Microsoft announced the IIS Application Warmup module as an IIS 7.5 feature only then to do a Bait & Switch and pull it again so that they can put it in IIS 8 instead, so I wonder if something exists to run on IIS 7.5/Windows 2008 R2?

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• How do I troubleshoot a server I can't get logged into?

  - by Karl

  This morning I am unable to log into SQL Server because it appears to be busy doing something, so much so that CPU usage is constantly at 98%-99%. I am guessing that something has gone wrong with the maintenance plan that ran over the weekend, but I can't get into the error logs see what is happening. On logging in I keep getting messages like "insufficiently memory in the buffer pool" and "the server is not responding". Is there any way I can figure out what is happening without logging onto to the server? Or some way I can squeeze in a login?

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• Server downtime - are these APC warnings the cause?

  - by DisgruntledGoat

  Yesterday I had a problem with my dedicated server (Ubuntu 10.04, LAMP). It wasn't down per se, but running incredibly slowly as if we had a massive overload of visitors (though I don't think we did). It's running smoothly again now. I've been checking through log files etc to see if I can find any issues, the only strange thing is a bunch of these errors, occurring at about the same time as the downtime: [apc-warning] Unable to allocate memory for pool. in [file] on line 49. And a bit later on: [apc-warning] GC cache entry '[file1]' (dev=2056 ino=8988092) was on gc-list for 3601 seconds in [file2] on line 746. Could these errors indicate the cause of the server slowdown, or are they simply a result of the server being slow in the first place? What would be the solution?

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• Difference between key_buffers and recommendation

  - by Typeoneerror

  I'm looking to add a bit of memory to MySQL on a Linode VPS server on which I've got a small facebook (canvas app) PHP app using MySQL running. I'm not super familiar with MySQL optimization so I'm hoping to find a simple answer. I think I want to increase the key_buffer size (the default is 16M) to something like 32M to start, but I'm not sure if I need to tweak anything else as well. All I've done so far is increase the query_cache_size to 32M from 16M. There's also key_buffer under [mysqld] and key_buffer under [isamchk]. What are the difference between those two? If I have Linode 2048MB (http://www.linode.com) VPS, what would recommend I set the buffers to? I don't expect this site to have tons of visitors, but I'd like it to be as optimized as possible. Definitely way more heavy on the database access than PHP and very few HTTP requests.

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• MySQL returning slow queries with result sets bigger than 30 rows

  - by josephs8

  When ever I run a query that exceeds 30 queries the time for the query to run goes from less than a second to over 10 seconds to get data. Example I run a query to return 29 rows, it takes .1 seconds, I run a query to return 31 rows it takes 11.2 seconds. I am running mySQL on Windows 2008 Server Dual Core 2.6Ghz with 3GB of Memory. The machine doesn't run anything else. It does have a instance of MSSQL running on the server but that does not get used at all. This only happens via PHP right now, If I manually run the query on the server it returns it in less than a second. The queries are not complicated either I have included one below: SELECT Name, Value FROM `bis_co`.`departments` LIMIT 31 What would be causing this issue and how can I correct this? Am I missing a configuration setting in MySQL or something. Thanks

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• CMD file time not always matching windows explorer file time

  - by skyrail

  I have a set of file I need to set the created, modified and last access date to exif date taken value, after a copy between 2 folders (might be fat32 on memory card or ntfs on fixed or usb disk). When I copy a file, the date and time switch to the current date. Then I change all 3 dates manually, either with change attributes in windows explorer or far manager on the command line. To make it faster I wrote a batch script getting original file dates (with php and function stat), building a batch script that invoke nircmd setfiletime for each file. Then I apply this batch to the copied version. The operation is relatively fast and reliable. Unfortunately, a bunch of files have last access and created time different in cmd and windows explorer (1H difference). Very strangely, it happens with dates between november and february, which make the operation unreliable. Why is this happening, and how can I fix it?

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• Xen DomU does not have network connectivity

  - by Prakashkumar Thiagarajan

  I am trying to install Xen on my Fedora box. Dom0 image has network connectivity. But when I try to create a DomU, it does not have network connectivity. I want to be able to run in bridged mode. I have the /etc/xend/xend-config.sxp file accordingly. My config file looks like kernel = "/boot/vmlinuz-2.6.18-xenU" memory = 64 name = "clientA" vif = ['bridge=xenbr0,mac=12.34.56.78.9A.BC'] root = "/dev/sda1 ro" ramdisk = "/boot/initrd-linux.img" extra = "ro selinux=0.3 initcall_debug" features = 'auto_translated_physmap' Am I missing something ?

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• What motherboard for a Core i7 920 Processor?

  - by jasondavis

  I am wanting to build a really nice PC, price is not to important as I will buy pieces every week or whatever it takes until I get everything I need. I am not a gamer but I would like to watch video and have 3-4 monitors. I do a lot of programming and use a lot of big programs so I would like to go all out and get a lot of Memory, probably at least 12gb but possibly more even as I see many boards support up to 24gb now. Will be using Windows 7. I have decided to go with the Core i7 920 Processor BX80601920. Based on what I posted above, can you please recommend some good motherboards I should look at ? Also some good places to purchase them online. Thanks for any help, tips, etc.

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• What would cause a query being ran from SSMS on local box to run slower then from remote box

  - by Racter

  When I run a simply query such as "Select Column1, Column2 from Table A" from within SSMS running on my production SQL Server the results seems to take extremely long (45Min). If I run the same query from my dev system’s SSMS connecting to the production SQL Server the results return within a few seconds (<60sec). One thing I have notices is if the system was just rebooted performance is good for a bit. It is hard to determine a time as I have had it start running slow very quickly after reboot but at most it performed good for 20min and then start acting up. Also, just restarting the SQL service does not resolve the issue or provide a temporary performance boost. Specs for Server are: Windows Server 2003, Enterprise Edition, SP2 4 X Intel Xeon 3.6GHz - 6GB System Memory Active/Active Cluster SQL Server 2005 SP2 (9.0.3239)

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• Is there a way to get the size of Outlook Calendar meeting items?

  - by bethlakshmi

  In our Exchange environment, our company caps the size of an Exchange account at a certain size. That size is the sum of all the exchange related stuff stored on the server - includign both the Inbox and the Calendar. I can tell with the Mailbox properties, Folder Size... window that my Calendar is a good 50% of my account's footprint. Is there any way to get a more detailed view of what meetings in the Calendar are taking up the space? Given the general pattern of incoming mail, it's my belief that 2-5 meetings are responsible for 75% of the memory consumption... I just need to find which meetings are the problem... and with my current calendar, it's a bit like finding a needle in a haystack. Anyone got a trick for this?

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• HAProxy being killed with more that 54,000 connections

  - by Olly

  I am trying to run HAProxy (1.4.8) on a EC2 machine running Ubuntu 10.04. I need HAProxy to be able to handle many thousands of long-running persistent connections (websockets). With the current setup HAProxy gets killed at around 54,300 connections (roughly). If I am running HAProxy in the foreground, the only output is "Killed". Am I right in thinking this is the Kernel killing the process? Is this because it is out of resources? Can I increase the resources? The CPU and memory consumption are low with 50,000 connections, so I don't suspect either of these. How can I prevent this from happening?

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• Windows 8 blue screen error watchdog violation

  - by Pramodh

  My system is windows 8 pro rtm x64. Recently my system started hanging frequently. Nothing but the restart button works. But now just after hanging it showed me a BSOD error saying watchdog violation. I used bluscreen viewer to see the error in the memory dump and it showed me something about hal.dll, ntoskrnl.exe. This is what windows showed me. Problem signature Problem Event Name: BlueScreen OS Version: 6.2.9200.2.0.0.256.48 Locale ID: 1033 Extra information about the problem BCCode: 133 BCP1: 0000000000000000 BCP2: 0000000000000281 BCP3: 0000000000000280 BCP4: 0000000000000000 OS Version: 6_2_9200 Service Pack: 0_0 Product: 256_1 Bucket ID: 0x133_DPC_NETIO!KfdClassify Server information: c03a9f52-f2b5-483f-9b4a-cbb5be3a72c0 Can anyone please walk me through the steps to get rid of this error please? Thank you.

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• Proxy service likes Apache Http

  - by Aptos

  Currently I try to simulate my app as distributed servers, so I let them run on localhost:9000 and localhost:9001, i tried using apache load balancer but it is really hard to config on mac, my idea is the second server localhost:9001 will be kept ideal and the requests only be redirected to them when the first server is downed. Is there any good free program can do that ? (except Apache httpd). Extra functions: my application is written in java and maintain an in-memory object, is there any service that can synchronize that object between 2 servers so they can keep uptodate status of other (the second one takes state of the first one)? Is there any app can support that? Thank you very much.

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• Mobile Intel 965 vs 4 Series chipset speed differences

  - by graham.reeds

  A client of ours is having a problem panning on a mapping application that we write on their panasonic toughbooks (CF-19's). One of their toughbooks the panning is fairly smooth while on the other it is really slow. Doesn't help that they have all the settings turned up, but I would of thought any reasonably new graphics card (even shared memory) would have more than adequate graphic speed. I am pretty sure that the graphic adapter is to blame, but I can't find anything out about either chipset (level of acceleration, non-problems, etc). All I get is the intel data sheets. The faster panning one is on the Mobile Intel 4 Series Express Chipset while the slower is on the Mobile Intel 965 Express Chipset. Is this expected? Does it sound like a driver problem? They both have the same amount of ram and same cpu.

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• What do you do with a 15 node decommissioned Itanium cluster?

  - by Gomibushi

  We are decommissioning a 15 node Itanium cluster. We don't know what to do with it. Being geeks we want to put it (or its individual nodes) to some cool use, but since it is Itanium we are a bit unsure what that could/would be. We are not bringing it back as production servers and we are considering giving them away, if anyone wants them. It's not the most spiffy hardware, but being 2U rack servers they pack an ok amount of cpu and memory, they're about 3 years old perhaps. Ideas to what runs well on them? Or something one can use them as?

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• Tell the linux kernel to put a file in the disk cache?

  - by Rory

  Is there any command to for a file to be read in and loaded into the linux disk cache? This is on an up-to-date debian system. I know in the general case, it's better to let the linux kernel figure this out. But I have an edge case. I have a laptop that has an NFS director mounted, and i want to play a long video file, but I don't want to have a network problem interrupt the playnig. I know that (largeish) file will be read in it's entirety later on. I know that nothing else (really) will be running while playing this video. There is enough free memory to store this file. (I know I could just copy the file into a new tmpfs filesystem, but I'm curious if there's an even shorter way to do it)

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• How SSD's drives reduce their latency?

  - by tigrou

  First time i read some information about SSD's, i was surprised to learn they internally use NAND flash chips. This kind of memory is generally slow (low bandwidth) and have high latency while SSD's are just the opposite. But here is how it works : SSD drives increase their bandwidth by using several NAND flash chips in parallel. In other words, they do some data striping (aka RAID0) across several chips (done by the controller). What i don't understand is how SSD's drives managed to reduce latency? (or at least lot better than what a single NAND chip without any controller can do)

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• Problem with running a program from flashdrive

  - by rajivpradeep

  I have a USB drive with two partitions in it, one hidden and one normal. I have an application which swaps the memory and runs the flash application in hidden zone. The problem is that the application works fine on Windows 7 and when run on Win XP, it swaps the partitions but doesn't run the flash applications but just keeps running in the background. I can see it in task manager. But, when I copy the application to desktop and run, it runs with no glitch. I was facing the same problem on Win 7 too, but it was running as required when I ran it using "Run in XP mode" and then I applied a SHIM and is running since then as required. The application is built using VC++ 2008. does anyone know the solution?

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• Problem with running a program from flashdrive

  - by rajivpradeep

  I have a USB drive with two partitions in it, one hidden and one normal. I have an application which swaps the memory and runs the flash application in hidden zone. The problem is that the application works fine on Windows 7 and when run on Win XP, it swaps the partitions but doesn't run the flash applications but just keeps running in the background. I can see it in task manager. But, when I copy the application to desktop and run, it runs with no glitch. I was facing the same problem on Win 7 too, but it was running as required when I ran it using "Run in XP mode" and then I applied a SHIM and is running since then as required. The application is built using VC++ 2008. does anyone know the solution?

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