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  • load-causing processes disappearing from "top" ps -o pcpu shows bogus numbers

    - by Alec Matusis
    I administer a large number of servers, and I have this problem only with Ubuntu 10.04 LTS: I run a server under normal load (say load average 3.0 on an 8-core server). The "top" command shows processes taking certain % of CPU that cause this load average: say PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 11008 mysql 20 0 25.9g 22g 5496 S 67 76.0 643539:38 mysqld ps -o pcpu,pid -p11008 %CPU PID 53.1 11008 , everything is consistent. The all of the sudden, the process causing the load average disappears from "top", but the process continues to run normally (albeit with a slight performance decrease), and the system load average becomes somewhat higher. The output of ps -o pcpu becomes bogus: # ps -o pcpu,pid -p11008 %CPU PID 317910278 1587 This happened to at least 5 different severs (different brand new IBM System X hardware), each running different software: one httpd 2.2, one mysqld 5.1, and one Twisted Python TCP servers. Each time the kernel was between 2.6.32-32-server and 2.6.32-40-server. I updated some machines to 2.6.32-41-server, and it has not happened on those yet, but the bug is rare (once every 60 days or so). This is from an affected machine: top - 10:39:06 up 73 days, 17:57, 3 users, load average: 6.62, 5.60, 5.34 Tasks: 207 total, 2 running, 205 sleeping, 0 stopped, 0 zombie Cpu(s): 11.4%us, 18.0%sy, 0.0%ni, 66.3%id, 4.3%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 74341464k total, 71985004k used, 2356460k free, 236456k buffers Swap: 3906552k total, 328k used, 3906224k free, 24838212k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 805 root 20 0 0 0 0 S 3 0.0 1493:09 fct0-worker 982 root 20 0 0 0 0 S 1 0.0 111:35.05 fioa-data-groom 914 root 20 0 0 0 0 S 0 0.0 884:42.71 fct1-worker 1068 root 20 0 19364 1496 1060 R 0 0.0 0:00.02 top Nothing causing high load is showing on top, but I have two highly loaded mysqld instances on it, that suddenly show crazy %CPU: #ps -o pcpu,pid,cmd -p1587 %CPU PID CMD 317713124 1587 /nail/encap/mysql-5.1.60/libexec/mysqld and #ps -o pcpu,pid,cmd -p1624 %CPU PID CMD 2802 1624 /nail/encap/mysql-5.1.60/libexec/mysqld Here are the numbers from # cat /proc/1587/stat 1587 (mysqld) S 1212 1088 1088 0 -1 4202752 14307313 0 162 0 85773299069 4611685932654088833 0 0 20 0 52 0 3549 27255418880 5483524 18446744073709551615 4194304 11111617 140733749236976 140733749235984 8858659 0 552967 4102 26345 18446744073709551615 0 0 17 5 0 0 0 0 0 the 14th and 15th numbers according to man proc are supposed to be utime %lu Amount of time that this process has been scheduled in user mode, measured in clock ticks (divide by sysconf(_SC_CLK_TCK). This includes guest time, guest_time (time spent running a virtual CPU, see below), so that applications that are not aware of the guest time field do not lose that time from their calculations. stime %lu Amount of time that this process has been scheduled in kernel mode, measured in clock ticks (divide by sysconf(_SC_CLK_TCK). On a normal server, these numbers are advancing, every time I check the /proc/PID/stat. On a buggy server, these numbers are stuck at a ridiculously high value like 4611685932654088833, and it's not changing. Has anyone encountered this bug?

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  • Migrate Palm m500 data into MS Office Outlook

    - by Bushman
    I have a rather old Palm m500 PDA that I have been considering replacing with a Blackberry, as it has been slowly starting to fail. I already have decided on which model I want, but the problem is that the information in Palm Desktop 4 (what of it is actually exportable) is in a legacy database format that can't be migrated to MS Office Outlook 2007. Is there a converter that will spit out an Outlook-importable file, or is there a free Windows PIM that happens to support importing/exporting both formats?

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  • Unable to use BootCamp to Install Windows 7 on my Macbook Pro

    - by Sheehan Alam
    I get the error: cannot complete the partitioning because some files cannot be moved. I have more than enough space (250GB harddrive, 150GB free) I have tried doing a full defrag with iDefrag I don't want to reformat my drive I have tried partitioning in safe mode I have repaired all Disk Permissions using Disk Utility Any suggestions? NOTE: I am installing Windows 7 64-bit I am trying to create a 32GB partition

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  • Slow Write Speed on ESXi host

    - by Gregg Leventhal
    I have an ESXi 5.0 free host with an internal datastore of 7.2K 5 disk RAID 5 using a PERC 710 mini RAID controller in a Dell Poweredge R620 Server with 32GB Ram and a 12 Core Xeon. I seem to get slow write speeds in the guests so I checked out ESXTOP and I see 15MB/s write speed there on this host, which is comprable to the guests. What could be causing such horrible write speeds? Is RAID 5 really this slow to write??

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  • Installing Heroku on Lucid Lynx reveals missing dependencies

    - by Sir Emeth
    I am trying to get a Ruby on Rails app hosted free somewhere, and Heroku is looking like my last resource. It is supposed to work on Linux, and the gem installs with no errors, but whenever I run any Heroku command it spits out several errors, all connected, and talking about a failed require. I looked it up in the code, and it says: require 'readline' That is it. I have tried to install every variation of libreadline that I can find and think of, but none of it makes any difference.

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  • What is the easiest video editing program to use on Windows

    - by Rob Allen
    I am looking for suggestions for video editing programs like iMovie, which are dead simple to use. We just need basic editing and titling features for making videos of our kids slightly more watchable. Nothing too fancy. The major requirement is that it needs to be extremely easy to use even without prior editor experience. We're running Windows XP on some machines and Vista the rest. Free is preferred however ease-of use trumps price.

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  • Getting more from an electricity monitor

    - by beakersoft
    Hi, I've recently got a free smart power electric energy monitor from my electric provider (npower, in the UK). While it is quite good i would like to pull the information from the monitor onto my home server, so i can get more detailed information and maybe graph it using mrtg or similar. Has anyone every tinkered about with them, how do the monitor and the display talk to each other (bluetooth/wifi) and any other info people might have. cheers Luke

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  • Why should I use Amazon Route 53 over my registrar's DNS servers?

    - by Abtin Forouzandeh
    I am building a site that I anticipate will have high usage. Currently, my registrar (GoDaddy) is handling DNS. However, Amazon's Route 53 looks interesting. They promise high speed and offer globally distributed DNS servers and a programmable interface. While GoDaddy doesn't offer a programmable interface, I assume their servers are geographically distributed as well. What are the main reasons I should opt to use Amazon Route 53 over free registrar-based DNS?

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  • What's the easiest way for a musician to make clips of their music freely availalbe?

    - by Clay Nichols
    I'm helping (pro bono) a really cool musician make samples of his music available so folks can share it. Essentially "shareware" for his music. Surely someone must have done this before. So far, I've found : http://sutros.com/ which is free but I've not read up on their Creative Commons license. And found a list here of other sites: http://www.vocalist.org.uk/artists_upload.html Any other suggestions?

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  • Deletion of SQL Profiler Trace files (.trc)

    - by Mark
    We've noticed a lot of .trc files in our SQL data folder (\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\Data) on our server. The date range for these files spans over one day and the total file size of all files together is about 21 gigs. I'd like to free up this space but I'm not sure if I can just delete the files manually through Windows Explorer or if I need to do anything in SQL, like run a command or script. Any ideas?

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  • Capture VHS to Mac

    - by Kato
    I have a Mac Pro running Leopard and a RCA to USB cable and a VCR. I'm trying to figure out the best way to capture VHS tapes onto my computer using what I have. I cannot seem to find video capturing software for Macs that would do this through USB, especially for cheap or free, or with the ability to capture in MPEG2 format. Does anyone have directions/suggestions?

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  • Looking for a simple Ticket Management Software

    - by waszkiewicz
    I'm looking for a good, free ticket management software that could be accessible from everywhere. The company is small (10 people) and the first goal is to have a database and to follow important incidents, even if someone is out of office. I tried OTRS, very nice but I suppose a bit complicated for some of our developers. Thanks for your suggestions. EDIT: I forgot to write that the platform is Windows for all users.

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  • Getting an alert when my oracle database goes up or down

    - by CodeSlave
    How can I get an e-mail alert when my oracle database comes up or down? I have a database that I need to know when it goes down (it would be nice to know if it has come back up), preferably from a remote machine. Conceivably I could hack together something that TNSPings my DB and e-mails me when that changes, but I'm hoping there's a free package out there. Something that would run on windows. Any strong recommendations?

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  • Automated capturing of screen using "Microsoft Expression Encoder Screen Capture" command line operations

    - by gentlesea
    I want to capture screen output automatically from within my TestComplete test program. For this i found the free limited version of "Microsoft Expression Encoder Screen Capture" which I want to automate. Is there a separate command line interface for Microsoft Expression Encoder Screen Capture or do I have to use the command line interface for Expression Studio? I found this options: http://msdn.microsoft.com/en-us/library/cc294683.aspx. But before I dig deeper, I want to know if I am on the right way.

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  • Which linux-based firewall?

    - by Atlas
    We are looking to replace our current aging firewall/router with a new one. We would prefer it to be free/opensource if possible. Our minimum requirements would be: 1) Site-to-site VPN 2) Web URL/IP filtering 3) 2 WAN connections with load-balancing 4) Easy-to-use web inferface Any suggestions? and why you chose yours.

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