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• php-fpm: very high server load

  - by Derp Derpington

  Since today my webserver (nginx + php-fpm + mysql on a VPS) is very slow. htop says: 1 [|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||100.0%] Tasks: 63 total, 13 running 2 [|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||100.0%] Load average: 11.67 10.95 6.95 3 [|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||100.0%] Uptime: 00:18:40 4 [|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||100.0%] 5 [|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||100.0%] 6 [|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||100.0%] Mem[||||||||||| 137/1280MB] Swp[ 0/0MB] PID USER PRI NI VIRT RES SHR S CPU% MEM% TIME+ Command 6802 www 20 0 76232 12320 5716 R 27.0 0.9 0:06.48 php-fpm: pool www 7048 www 20 0 75200 12136 5700 R 52.0 0.9 0:03.64 php-fpm: pool www 6699 www 20 0 74176 11124 5700 R 27.0 0.8 0:07.36 php-fpm: pool www 7029 www 20 0 73668 10380 5676 R 42.0 0.8 0:03.52 php-fpm: pool www 6995 www 20 0 76228 12456 5644 R 42.0 1.0 0:03.98 php-fpm: pool www 6858 www 20 0 74172 10684 5620 R 35.0 0.8 0:05.52 php-fpm: pool www 6998 www 20 0 75200 12072 5620 R 37.0 0.9 0:03.95 php-fpm: pool www 7098 www 20 0 75200 12052 5616 R 42.0 0.9 0:02.33 php-fpm: pool www 7093 www 20 0 76228 12496 5612 R 37.0 1.0 0:03.02 php-fpm: pool www 7226 www 20 0 74692 11080 5588 R 32.0 0.8 0:00.66 php-fpm: pool www CPU: (cat /proc/cpuinfo | grep model) model : 44 model name : Intel(R) Xeon(R) CPU E5620 @ 2.40GHz model : 44 model name : Intel(R) Xeon(R) CPU E5620 @ 2.40GHz model : 44 model name : Intel(R) Xeon(R) CPU E5620 @ 2.40GHz model : 44 model name : Intel(R) Xeon(R) CPU E5620 @ 2.40GHz model : 44 model name : Intel(R) Xeon(R) CPU E5620 @ 2.40GHz model : 44 model name : Intel(R) Xeon(R) CPU E5620 @ 2.40GHz I think a load of 10 and 100% cpu usage is not normal... How can i fix that?

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• PHP-FPM High Memory Usage

  - by Ruel

  I have a wordpress blog, that uses WP-SuperCache, and normally I get 100 visitors per day. With nginx + php-fpm it's blazing fast, and I have no regrets. One thing i noticed, php-fpm takes a lot of memory: top - 09:20:43 up 5 days, 15:53, 1 user, load average: 0.00, 0.00, 0.00 Tasks: 26 total, 1 running, 25 sleeping, 0 stopped, 0 zombie Cpu(s): 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 1048576k total, 329956k used, 718620k free, 0k buffers Swap: 0k total, 0k used, 0k free, 0k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 10226 www-data 15 0 145m 52m 4584 S 0.0 5.1 0:07.55 php-fpm 10223 www-data 16 0 141m 48m 4692 S 0.0 4.8 0:08.70 php-fpm 20277 www-data 15 0 138m 46m 4368 S 0.0 4.5 0:07.55 php-fpm 20259 www-data 15 0 133m 41m 4600 S 0.0 4.0 0:06.68 php-fpm 12201 www-data 15 0 133m 41m 4632 S 0.0 4.0 0:08.31 php-fpm 11586 www-data 15 0 132m 40m 4292 S 0.0 3.9 0:03.27 php-fpm 29822 www-data 15 0 128m 36m 4356 S 0.0 3.6 0:05.26 php-fpm 28427 mysql 15 0 200m 7300 4764 S 0.0 0.7 0:47.89 mysqld 10202 root 18 0 98.3m 4320 1204 S 0.0 0.4 0:03.80 php-fpm 22524 root 18 0 86064 3396 2652 S 0.0 0.3 0:16.74 sshd 9882 www-data 18 0 42052 2572 804 S 0.0 0.2 0:27.52 nginx 9884 www-data 18 0 42052 2560 804 S 0.0 0.2 0:26.26 nginx 9881 www-data 18 0 42064 2524 804 S 0.0 0.2 0:29.24 nginx 9879 www-data 18 0 42032 2480 804 S 0.0 0.2 0:29.58 nginx 23771 root 15 0 12176 1820 1316 S 0.0 0.2 0:00.08 bash 28344 root 22 0 11932 1416 1184 S 0.0 0.1 0:00.00 mysqld_safe 18167 root 16 0 62628 1208 648 S 0.0 0.1 0:00.55 sshd 25941 root 15 0 12612 1192 928 R 0.0 0.1 0:02.21 top 11573 root 15 0 20876 1168 592 S 0.0 0.1 0:00.67 crond 9878 root 18 0 41000 1112 284 S 0.0 0.1 0:00.00 nginx 21736 root 23 0 21648 936 716 S 0.0 0.1 0:00.00 xinetd 11585 root 18 0 46748 816 428 S 0.0 0.1 0:00.00 saslauthd 14125 root 12 -4 12768 768 452 S 0.0 0.1 0:00.00 udevd 1 root 18 0 10352 728 616 S 0.0 0.1 0:17.93 init 24564 root 15 0 5912 680 544 S 0.0 0.1 0:01.90 syslogd 11618 root 18 0 46748 548 160 S 0.0 0.1 0:00.00 saslauthd Here's my php-fpm config: [global] pid = run/php-fpm.pid error_log = log/php-fpm.log log_level = notice [www] listen = 127.0.0.1:9000 user = www-data group = www-data pm = dynamic pm.max_children = 50 pm.start_servers = 3 pm.min_spare_servers = 3 pm.max_spare_servers = 10 pm.max_requests = 500 Sometimes it goes up to 400MB. And I'm planning to add a new website on my VPS. Is this normal?

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• iSCSI timeouts under high load

  - by Antonio

  I have two servers connected via Gigabit Ethernet. One is iSCSI target, the second one is initiator. When I run mkfs.ext4 at initiator, after a while disk IO slows down critically. In the target host I can see the following in syslog: Sep 14 09:40:03 sh11 tgtd: abort_task_set(1139) found 119668c 0 Sep 14 09:40:03 sh11 tgtd: abort_cmd(1115) found 119668c 6 Sep 14 09:40:03 sh11 tgtd: abort_task_set(1139) found 119668d 0 Sep 14 09:40:03 sh11 tgtd: abort_cmd(1115) found 119668d 6 Sep 14 09:40:03 sh11 tgtd: abort_task_set(1139) found 119668e 0 Sep 14 09:40:03 sh11 tgtd: abort_cmd(1115) found 119668e 6 Sep 14 09:40:03 sh11 tgtd: abort_task_set(1139) found 1196696 0 Sep 14 09:40:03 sh11 tgtd: abort_cmd(1115) found 1196696 6 Sep 14 09:40:03 sh11 tgtd: abort_task_set(1139) found 119669e 0 Sep 14 09:40:03 sh11 tgtd: abort_cmd(1115) found 119669e 6 Sep 14 09:40:04 sh11 tgtd: abort_task_set(1139) found 119669f 0 Sep 14 09:40:04 sh11 tgtd: abort_cmd(1115) found 119669f 6 And load average grows to 12 or even more: # uptime 12:37:00 up 23 days, 13:25, 1 user, load average: 12.00, 7.00, 4.00 CentOS 6.3 tgtd 1.0.24 Intel Pentium 4 2.4GHz 1Gb RAM 2Tb WD Cavlar Green SATA 2.0 #lspci 00:00.0 Host bridge: Intel Corporation 82845G/GL[Brookdale-G]/GE/PE DRAM Controller/Host-Hub Interface (rev 02) 00:01.0 PCI bridge: Intel Corporation 82845G/GL[Brookdale-G]/GE/PE Host-to-AGP Bridge (rev 02) 00:1d.0 USB controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #1 (rev 02) 00:1d.1 USB controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #2 (rev 02) 00:1d.2 USB controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) USB UHCI Controller #3 (rev 02) 00:1d.7 USB controller: Intel Corporation 82801DB/DBM (ICH4/ICH4-M) USB2 EHCI Controller (rev 02) 00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev 82) 00:1f.0 ISA bridge: Intel Corporation 82801DB/DBL (ICH4/ICH4-L) LPC Interface Bridge (rev 02) 00:1f.1 IDE interface: Intel Corporation 82801DB (ICH4) IDE Controller (rev 02) 00:1f.3 SMBus: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) SMBus Controller (rev 02) 00:1f.5 Multimedia audio controller: Intel Corporation 82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller (rev 02) 01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI RV200 QW [Radeon 7500] 02:01.0 Ethernet controller: D-Link System Inc DGE-530T Gigabit Ethernet Adapter (rev 11) (rev 11) 02:02.0 RAID bus controller: VIA Technologies, Inc. VT6421 IDE/SATA Controller (rev 50) 02:03.0 RAID bus controller: VIA Technologies, Inc. VT6421 IDE/SATA Controller (rev 50) 02:04.0 RAID bus controller: Silicon Image, Inc. SiI 3114 [SATALink/SATARaid] Serial ATA Controller (rev 02) 02:08.0 Ethernet controller: Intel Corporation 82801DB PRO/100 VE (CNR) Ethernet Controller (rev 82) Is there a way to tune target host to avoid these timeouts?

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• High Sqlservr.exe Memory Usage

  - by user18576

  I have a problem with sqlservr.exe (version 2008). It use a more memory. I checked on windows taskbar manager, sqlservr.exe usage ( Mem usage - 8GB Ram). I dont know how can I fix it.Got the following metrics of the server using Perfmon: SQLServer:Buffer Manager Buffer cache hit ratio 13 SQLServer:Buffer Manager Page lookups/sec 46026128096 SQLServer:Buffer Manager Free pages 129295 SQLServer:Buffer Manager Total pages 997309 SQLServer:Buffer Manager Target pages 1053560 SQLServer:Buffer Manager Database pages 484117 SQLServer:Buffer Manager Reserved pages 0 SQLServer:Buffer Manager Stolen pages 383897 SQLServer:Buffer Manager Lazy writes/sec 384369 SQLServer:Buffer Manager Readahead pages/sec 69315446 SQLServer:Buffer Manager Page reads/sec 71280353 SQLServer:Buffer Manager Page writes/sec 12408371 SQLServer:Buffer Manager Checkpoint pages/sec 7053801 SQLServer:Buffer Manager Page life expectancy 735262 SQLServer:General Statistics Active Temp Tables 161 SQLServer:General Statistics Temp Tables Creation Rate 3131845 SQLServer:General Statistics Logins/sec 2336011 SQLServer:General Statistics Logouts/sec 2335984 SQLServer:General Statistics User Connections 27 SQLServer:General Statistics Transactions 0 SQLServer:Access Methods Full Scans/sec 34422821 SQLServer:Access Methods Range Scans/sec 2027247756 SQLServer:Access Methods Workfiles Created/sec 49771600 SQLServer:Access Methods Worktables Created/sec 28205828 SQLServer:Access Methods Index Searches/sec 4890715219 SQLServer:Access Methods FreeSpace Scans/sec 21178928 SQLServer:Access Methods FreeSpace Page Fetches/sec 21226653 SQLServer:Access Methods Pages Allocated/sec 41483279 SQLServer:Access Methods Extents Allocated/sec 4743504 SQLServer:Access Methods Extent Deallocations/sec 4806606 SQLServer:Access Methods Page Deallocations/sec 41419137 SQLServer:Access Methods Page Splits/sec 23834799 SQLServer:Memory Manager SQL Cache Memory (KB) 29160 SQLServer:Memory Manager Target Server Memory (KB) 8428480 SQLServer:Memory Manager Total Server Memory (KB) 7978472 Some body could help me please.And I really want to know the cause for the above.

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• New host, high load?

  - by dotancohen

  A few minutes ago I signed up at a new webhost. I have yet to move my sites over. Upon initial SSH connection, I checked the load and memory usage, they do seem rather higher than I would like: # uptime 12:06:51 up 71 days, 23:23, 1 user, load average: 9.02, 9.49, 9.45 # free total used free shared buffers cached Mem: 33014800 31927192 1087608 0 2384812 17729816 -/+ buffers/cache: 11812564 21202236 Swap: 16787916 8584 16779332 Is that a bit to packed? I'm only paying about $5 USD per month, so I don't expect <0.1 loads, but ~10 is worrisome. Is it not? Also, there is no /etc/issue file so I tried other methods to guess the OS: # uname -a Linux box358.bluehost.com 2.6.32-20120131.55.1.bh6.x86_64 #1 SMP Tue Jan 31 15:43:27 EST 2012 x86_64 x86_64 x86_64 GNU/Linux # which yum /usr/bin/yum # which apt-get # That looks like CentOS / RHEL 6.2 possibly?

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• Internet speed showing high value but never felt that speed [closed]

  - by Kiran D Pillai

  I use Reliance Netconnect+ in my Toshiba Satellite laptop. My OS is Windows 7 Ultimate. I've seen speeds up to 1500 kbps when travelling and have an average speed of 400 kbps at my room premises. I'm sorry, I've never felt that much speed while browsing or downloading. Sometimes I think some other programs are also sharing the same network. It is just showing 200 or 500 kbps but I feel 25 or 50 kbps. Is there any way to prevent them? I use Google Chrome downloaded from Google site. Please suggest me some solutions.

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• mysqld causes high CPU load

  - by Radu

  My mysqld goes to use 99.9% of CPU for variable time (between 2 - 20 minutes), and then goes back to normal 0.1% - 5%. Checked processlist: all is normal, 1 to 20 inserts or updates that last 2 to 5 sec, and about 20 process that are in Sleep Mode (maybe because the scripts don't close the mysql connection, but are they are closed in about 5 - 10 secs, I didn't make the scripts :P but the server was running fine the last 2 years, since is was made): | 15375 | root | localhost | stoc | Query | 0 | NULL | show processlist | | 79480 | pppoe | localhost | pppoe | Sleep | 4 | NULL | NULL | | 79481 | pppoe | localhost | pppoe | Sleep | 4 | NULL | NULL | | 79482 | pppoe | localhost | pppoe | Sleep | 4 | NULL | NULL | | 79483 | pppoe | localhost | pppoe | Query | 0 | init | UPDATE acc SET InputOctets="0", OutputOctets="0", InputPackets="unknown", OutputPackets="User | | 79484 | pppoe | localhost | pppoe | Sleep | 5 | NULL | NULL | | 79485 | pppoe | localhost | pppoe | Sleep | 5 | NULL | NULL | | 79486 | pppoe | localhost | pppoe | Sleep | 5 | NULL | NULL Checked raid, seemns OK: [root@db2]# cat /proc/mdstat Personalities : [raid5] [raid4] [raid1] md0 : active raid1 sdd1[3] sdc1[2] sdb1[0] sda1[1] 136448 blocks [4/4] [UUUU] md1 : active raid5 sdd2[3] sdc2[2] sdb2[0] sda2[1] 12023808 blocks level 5, 256k chunk, algorithm 2 [4/4] [UUUU] md3 : active raid5 sda4[1] sdd4[3] sdc4[2] sdb4[0] 203647488 blocks level 5, 256k chunk, algorithm 2 [4/4] [UUUU] md2 : active raid5 sda3[1] sdd3[3] sdc3[2] sdb3[0] 24024576 blocks level 5, 256k chunk, algorithm 2 [4/4] [UUUU] unused devices: <none> [root@db2]# top sees my mysqld cpu load, but nothing else seems to be wrong: [root@db2]# top top - 17:56:05 up 7 days, 3:55, 3 users, load average: 32.93, 24.72, 22.70 Tasks: 75 total, 4 running, 71 sleeping, 0 stopped, 0 zombie Cpu(s): 63.4% us, 36.6% sy, 0.0% ni, 0.0% id, 0.0% wa, 0.0% hi, 0.0% si, 0.0% st Mem: 1988824k total, 1304776k used, 684048k free, 99588k buffers Swap: 12023800k total, 0k used, 12023800k free, 951028k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 5754 mysql 19 0 236m 57m 5108 R 99.9 2.9 21:58.76 mysqld 1 root 16 0 7216 700 580 S 0.0 0.0 0:00.39 init 2 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/0 Repaired all mysql databases, reindexed raid ... I'm running out of ideeas ... Anyone has an ideea what can go wrong with this server ? Thank you

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• Incredibly high latency for Ubuntu guest on Hyper-V

  - by Mark Henderson

  I've got several Ubuntu 10.04 virtual machines running as Hyper-V guests on Windows Server 2008 R2 SP1 and they're all perfectly fine. Today I installed my first Ubuntu 11.10 virtual machine and I'm seeing rediculous pings: These servers are all connected via gigabit to a local LAN, with almost no network traffic at all1, with a legacy network adapter in Hyper-V. I'm a bit of an Ubuntu n00b so I don't really know where to go from here. Any ideas? free -m reports: total used free shared buffers cached Mem: 485 470 15 0 63 299 -/+ buffers/cache: 107 378 Swap: 507 20 487 This is within a few mb of our other Ubuntu servers that are on 10.04. I removed the Legacy NIC and installed a Synthetic one in Hyper-V and this did improve the numbers, in that they're around 10-30ms now, but I would still be expecting <1ms response times. 1As a comparison, I have another Ubuntu 10.04 guest on Hyper-V almost 1,000km away that has a ping of 33ms

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• Load balancing Apache on a budget?

  - by Industrial

  Hi everyone, I am trying to get my head around the concept of load balancing to ensure availability and redundancy to keep users happy when things go wrong, rather than load balancing for the sake of offering blistering speed to millions of users. We're on a budget and trying to stick to the stuff where there's plenty of knowledge available, so running Apache on Ubuntu VPS's seems like the strategy until some famous search engine acquire us (Saturday irony included, please note). At least to me, it's a complete jungle of different solutions available. Apaches own mod_proxy & HAproxy are two that we found by a quick google search, but having zero experience of load balancing, I have no idea of what would be appropriate for our situation, or what we would look after while choosing a solution to solve our availability concerns. What is the best option for us? What should we do to get availability high whilst staying inside our budgets?

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• /lib/udev/net.agent causing high CPU usage

  - by Antoine Benkemoun

  We have a number of Soekris boxes running Debian Squeeze. They were installed through an automated process consisting of using deboostrap and copying it unto a Compact Flash card. We use puppet to manage the configuration of all these boxes. Before Debian Squeeze, they were running Voyage Linux which is just a "lighter" version of Debian. Since we have switched, we're seeing the /lib/udev/net.agent process take up an aweful lot of CPU. We have so far been unable to find any clue as to what this really does and why it's taking up some much CPU time. In htop we see the following : We are seeing absolutly no syslog messages related to this process so we're a bit lost... So, I am looking for pointers as to what this process does in general and what could be the potential cause of such CPU usage.

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• Terminal server performance over high latency links

  - by holz

  Our datacenter and head office is currently in Brisbane, Australia, and we have a branch office in the UK. We have a private WAN with a 768k link to our UK office and the latency is at about 350ms. The terminal server performance is reeeeealy bad. Applications that don't have too much animation or any images seem to be okay. But as soon as they do, the session is almost unusable. Powerpoint and internet explorer are good examples of apps that make it run slow. And if there is an image in your email signature, outlook will hang for about 10 seconds each time a new line is inserted, while the image gets moved down a few pixels. We are currently running server 2003. I have tried Server 2008 R2 RDS, and also a third party solution called Blaze by a company called Ericom, but it is still not too much better. We currently have a 5 levels dynamic class of service with the priority in the following order. VoIP Video Terminal Services Printing Everything else When testing the terminal server performance, the link monitored using net-flows, and have plenty we of bandwidth available, so I believe that it is a latency issue rather than bandwidth. Is there anything that can be done to improve performance. Would citrix help at all?

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• django, mod_wsgi, MySQL High CPU - Problems

  - by Red Rover

  I am having a problem with an OSQA site. It is Django/Apache/mod_wsgi configured site. Every hour, the CPU spikes to 164% (Average) for task HTTPD. After 10 minutes, it frees back up. I have reviewed the logs, cron tables, made many config changes, but cannot track this problem down. Can someone please look at the information below and let me know if it is a configuration problem, or if anyone else has experienced this issue. Running TOP shows HTTPD using 165% of CPU VMware performance monitor also displays spikes. This happens every hour for 10 minutes. I have the following information from server status Server Version: Apache/2.2.15 (Unix) DAV/2 mod_wsgi/3.2 Python/2.6.6 Server Built: Feb 7 2012 09:50:15 Current Time: Sunday, 10-Jun-2012 21:44:29 EDT Restart Time: Sunday, 10-Jun-2012 19:44:51 EDT Parent Server Generation: 0 Server uptime: 1 hour 59 minutes 37 seconds Total accesses: 1088 - Total Traffic: 11.5 MB CPU Usage: u80.26 s243.8 cu0 cs0 - 4.52% CPU load .152 requests/sec - 1682 B/second - 10.8 kB/request 4 requests currently being processed, 11 idle workers ....._..........__......W....................................... ...................................C._..._....._L__._L_._....... ...................... Scoreboard Key: "_" Waiting for Connection, "S" Starting up, "R" Reading Request, "W" Sending Reply, "K" Keepalive (read), "D" DNS Lookup, "C" Closing connection, "L" Logging, "G" Gracefully finishing, "I" Idle cleanup of worker, "." Open slot with no current process Srv PID Acc M CPU SS Req Conn Child Slot Client VHost Request 0-0 - 0/0/34 . 0.42 327 17 0.0 0.00 0.67 127.0.0.1 osqa.informs.org OPTIONS * HTTP/1.0 1-0 - 0/0/22 . 0.31 339 32 0.0 0.00 0.26 127.0.0.1 osqa.informs.org OPTIONS * HTTP/1.0 2-0 - 0/0/22 . 0.65 358 10 0.0 0.00 0.31 127.0.0.1 osqa.informs.org OPTIONS * HTTP/1.0 3-0 - 0/0/31 . 1.03 378 31 0.0 0.00 0.60 127.0.0.1 osqa.informs.org OPTIONS * HTTP/1.0 4-0 - 0/0/20 . 0.45 356 9 0.0 0.00 0.31 127.0.0.1 osqa.informs.org OPTIONS * HTTP/1.0 5-0 18852 0/16/34 _ 0.98 27 18120 0.0 0.37 0.62 69.180.250.36 osqa.informs.org GET /questions/289/what-is-the-difference-between-operations-re 6-0 - 0/0/32 . 0.94 309 29 0.0 0.00 0.64 127.0.0.1 osqa.informs.org OPTIONS * HTTP/1.0 7-0 - 0/0/31 . 1.15 382 32 0.0 0.00 0.75 127.0.0.1 osqa.informs.org OPTIONS * HTTP/1.0 8-0 - 0/0/21 . 0.28 403 19 0.0 0.00 0.20 127.0.0.1 osqa.informs.org OPTIONS * HTTP/1.0 9-0 - 0/0/32 . 1.37 288 16 0.0 0.00 0.60 127.0.0.1 osqa.informs.org OPTIONS * HTTP/1.0 10-0 - 0/0/33 . 1.72 383 16 0.0 0.00 0.40 127.0.0.1 osqa.informs.org OPTIONS * HTTP/1.0 I am running Django 1.3 This is a mod_wsgi configuration and copied is the wsgi.conf file: <IfModule !python_module> <IfModule !wsgi_module> LoadModule wsgi_module modules/mod_wsgi.so <IfModule wsgi_module> <Directory /var/www/osqa> Order allow,deny Allow from all #Deny from all </Directory> WSGISocketPrefix /var/run/wsgi WSGIPythonEggs /var/tmp WSGIDaemonProcess OSQA maximum-requests=10000 WSGIProcessGroup OSQA Alias /admin_media/ /usr/lib/python2.6/site-packages/Django-1.2.5-py2.6.egg/django/contrib/admin/media/ Alias /m/ /var/www/osqa/forum/skins/ Alias /upfiles/ /var/www/osqa/forum/upfiles/ <Directory /var/www/osqa/forum/skins> Order allow,deny Allow from all </Directory> WSGIScriptAlias / /var/www/osqa/osqa.wsgi </IfModule> </IfModule> </IfModule> This is the httpd.conf file Timeout 120 KeepAlive Off MaxKeepAliveRequests 100 MaxKeepAliveRequests 400 KeepAliveTimeout 3 <IfModule prefork.c> Startservers 15 MinSpareServers 10 MaxSpareServers 20 ServerLimit 50 MaxClients 50 MaxRequestsPerChild 0 </IfModule> <IfModule worker.c> StartServers 4 MaxClients 150 MinSpareThreads 25 MaxSpareThreads 75 ThreadsPerChild 25 MaxRequestsPerChild 0 </IfModule> We are using MySQL The server is an ESX4i, configured for the VM to use 4 CPUs and 8 GB Ram. Hyper threading is enabled, 2 physical CPU's, with 4 Logical. the CPU are Intel Xeon 2.8 GHz. Total memory is 12GB

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• Munin "Disk usage" is too high?

  - by f-aminov

  I've recently installed munin on my VMware client server and saw that the Disk usage shows about 80-90%. Everything else (cpu load, ram, etc.) seems to be running fine. I have only two virtual hosts on my server with 1000 users/day in total, so I don't think that's too much. Here is the graph for the disk usage. Server info: Debian Lenny, CPU 510Mhz, RAM 512MB Is it bad? What could possibly cause this? Thank you for any suggestions.

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• high virtual memory usage in openvz?

  - by freedrull

  We're having a lot of memory problems on a new OpenVZ box. It is supposed to have 1 gig of memory, I'm not sure how much of that is burstable or guaranteed memory. Programs in general seem to take up more virtual memory than they do on my box at home, and on our other OpenVZ box. I wrote this simple C program: #include <stdio.h> #include <stdlib.h> int main(){ char *thingy = malloc(500); getchar(): return 0; } So it simply allocates 500 bytes and then returns. I ran the program on 3 computers. On my home machine, and our other OpenVZ box it shows about 1k bytes of virtual memory being used. On the new problematic machine its about 3k. I know this is just virtual memory and not resident memory, but why is this machine allocating so much virtual memory? Are there some settings I need to adjust to the OpenVZ memory settings? I tried changing the stack size with ulimit -s 256 and restarting some demons, but I still saw the same results. I'm doing all of my monitoring with htop, is this even a good program to use with a OpenVZ vps? I've read I should be parsing the output of /proc/user_beancounters intead or something.

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• High CPU usage when running a CentOS guest in VirtualBox

  - by sagi

  I am running CentOS 5.3 as a VirtualBox 3.0.0 guest running on Windows XP. The Windows host CPU usage is constantly at 50% although the CentOS guest is completely idle (i.e. 0.00 load average). I know this is a common problem related to the 1000Hz frequency that the CentOS kernel runs at, and previously a special kernel-vm packages were released to resolve the issue. However, these packages are out of date and the README says that they are not not necessary as of CentOS 5.3. I found out that there is supposedly a kernel parameter divider=10 that reduces the frequency to 100Hz with the standard kernel but it doesn't seem to have any effect when running inside VirtualBox. Is there any way to resolve the issue without resorting to a custom kernel?

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• High RAM usage, not seen in task manager

  - by r4dk0

  Hi! I am using Windows 7 64-bit 7600, with 4Gb of RAM. I have a serious problem, since something uses a lot of RAM(3.94Gb) and I see "stairs" in taskmanager, it rises to +3Gb RAM and it drops to about 2Gb and then rises slowly again, and suddenly drops. I tryed installing this version again and other versions, newer ones, but no effect. Ive even tryed disconnecting other harddrives while I installed it, and then installed NOD32 and updated it. How could I know what is using that much RAM? P.S.: I was suspecting superfetch service, I disabled it, restarted pc, and it didnt work, since the memory is the highest point when I login with password, it is really annoying since I need about 1minute to see my desktop, neither alone try anything else. After loging in it slowly drops and after random time it starts rising again. That doesnt happen immediately after a fresh windows install. And how the drivers go, I tryed older drivers for GPU, and newest ones.

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• High RAM usage, not seen in task manager

  - by r4dk0

  Hi! I am using Windows 7 64-bit 7600, with 4Gb of RAM. I have a serious problem, since something uses a lot of RAM(3.94Gb) and I see "stairs" in taskmanager, it rises to +3Gb RAM and it drops to about 2Gb and then rises slowly again, and suddenly drops. I tryed installing this version again and other versions, newer ones, but no effect. Ive even tryed disconnecting other harddrives while I installed it, and then installed NOD32 and updated it. How could I know what is using that much RAM? P.S.: I was suspecting superfetch service, I disabled it, restarted pc, and it didnt work, since the memory is the highest point when I login with password, it is really annoying since I need about 1minute to see my desktop, neither alone try anything else. After loging in it slowly drops and after random time it starts rising again. That doesnt happen immediately after a fresh windows install. And how the drivers go, I tryed older drivers for GPU, and newest ones.

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• managing a high traffic media sharing website

  - by Jordan Westerman

  i'm in the process of developing a website that i predict will generate a lot of traffic. the site will be similar to many other sites offering free media streaming: mp3's. we are going to start with a pretty minimal amount of media to share, but the basic idea is that artists will set up a profile page with music they have made available for consumers to visit the page and listen to the music. we are starting with just a handful of artists, but i think that this project will generate more and more artist pages. eventually i'd like to set it up so consumers can create personalized playlists. how can i best prepare server space and bandwidth capabilities? i have a small team of web designers and programmers working on the site, as i am pretty illiterate when it comes to site management. as the ring leader of this organization, i am more or less looking for financial requirements and monthly burn rate estimates. i don't have a ton of capitol to start with, putting together a business plan, but i am seeking investments. i have a game plan to grow fast enough to be successful, and slow enough to manage the financial growth requirements. any questions i may have failed to ask myself? is it realistic to start this project on a shared server, and upgrade? any financial advice you think i can use? i really appreciate any advice given, as this is my first business venture. thank you all in advance. Jordan Westerman D.B.A. Badfish Productions, LLC

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• High Jitter in NTP and poll value never goes above 128

  - by Aseem

  I have a lot of servers syncing to the same NTP servers (4). Not every server is in the same LAN. Some are 3 hops away from the NTP servers and some are 6 hops away. On couple of servers I see that the poll value never touches the 1024 mark and the jitter value is in double digits. Could it be due to the system hardware? These are windows servers (physical) and require as accurate time as possible. Please advice what I should do. Some of the stats that I collected manually from the bad box (which is 6 hops away from the ntp servers) C:\Program Files (x86)\NTP>ntpq -p -n remote refid st t when poll reach delay offset jitter ============================================================================== +*.*.*.25 *.*.*.233 2 u 12 128 377 1.210 -12.579 14.913 +*.*.*.26 *.*.*.233 2 u 96 128 377 1.067 -2.235 9.885 **.*.*.27 *.*.*.233 2 u 24 128 377 1.038 -7.569 11.178 +*.*.*.28 *.*.*.233 2 u 49 128 377 1.288 -11.058 14.544 remote refid st t when poll reach delay offset jitter ============================================================================== +*.*.*.25 *.*.*.233 2 u 124 128 377 0.614 -6.212 5.329 +*.*.*.26 *.*.*.233 2 u 93 128 377 0.910 -9.431 3.111 +*.*.*.27 *.*.*.233 2 u 1 128 377 0.824 -7.428 3.129 **.*.*.28 *.*.*.233 2 u 84 128 377 1.503 -8.230 3.511 remote refid st t when poll reach delay offset jitter ============================================================================== **.*.*.25 *.*.*.233 2 u 117 128 377 1.235 -4.084 11.405 +*.*.*.26 *.*.*.233 2 u 96 128 377 1.335 -11.813 13.130 +*.*.*.27 *.*.*.233 2 u 130 128 377 1.549 -14.036 16.381 -*.*.*.28 *.*.*.233 2 u 79 128 377 1.258 13.395 22.203 remote refid st t when poll reach delay offset jitter ============================================================================== **.*.*.25 *.*.*.233 2 u 88 128 377 1.235 -4.084 14.068 +*.*.*.26 *.*.*.233 2 u 63 128 377 1.335 -11.813 17.086 +*.*.*.27 *.*.*.233 2 u 103 128 377 1.549 -14.036 20.691 -*.*.*.28 *.*.*.233 2 u 47 128 377 1.258 13.395 20.231 remote refid st t when poll reach delay offset jitter ============================================================================== +*.*.*.25 *.*.*.233 2 u 47 64 377 0.652 -15.805 14.077 **.*.*.26 *.*.*.233 2 u 11 64 377 1.013 -14.423 11.375 -*.*.*.27 *.*.*.233 2 u 63 64 377 0.765 -2.030 7.680 +*.*.*.28 *.*.*.233 2 u 4 64 377 1.191 -17.980 14.393 remote refid st t when poll reach delay offset jitter ============================================================================== -*.*.*.25 *.*.*.233 2 u 3 128 377 1.576 18.665 21.999 +*.*.*.26 *.*.*.233 2 u 73 128 377 0.637 -5.012 14.405 **.*.*.27 *.*.*.233 2 u 127 128 377 0.272 -8.237 14.438 +*.*.*.28 *.*.*.233 2 u 123 128 377 1.190 -14.383 18.875 C:\Program Files (x86)\NTP>ntpdc -c loopinfo offset: -0.016430 s frequency: 7.106 ppm poll adjust: 18 watchdog timer: 133 s offset: -0.016430 s frequency: 7.106 ppm poll adjust: 18 watchdog timer: 341 s offset: -0.000149 s frequency: 6.645 ppm poll adjust: 0 watchdog timer: 383 s offset: 0.015735 s frequency: 6.725 ppm poll adjust: 7 watchdog timer: 577 s offset: -0.010331 s frequency: 6.748 ppm poll adjust: 21 watchdog timer: 567 s offset: -0.009427 s frequency: 6.687 ppm poll adjust: 28 watchdog timer: 301 s offset: -0.007361 s frequency: 6.612 ppm poll adjust: 30 watchdog timer: 155 s offset: -0.008106 s frequency: 4.358 ppm poll adjust: 30 watchdog timer: 291 s NTP.conf # NTP configuration file # Use drift file driftfile "C:\Program Files (x86)\NTP\ntp.drift" # Logs statistics loopstats peerstats clockstats statsdir "C:\Program Files (x86)\NTP\logs\" # directory for statistics files filegen peerstats file peerstats type day enable filegen loopstats file loopstats type day enable filegen clockstats file clockstats type day enable logfile "C:\Program Files (x86)\NTP\logs\syslog.txt" # Use specific NTP servers server *.*.*.25 minpoll 4 maxpoll 7 iburst server *.*.*.26 minpoll 4 maxpoll 7 iburst server *.*.*.27 minpoll 4 maxpoll 7 iburst server *.*.*.28 minpoll 4 maxpoll 7 iburst

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• Ubuntu: Take actions when system temperature gets too high

  - by Josh

  One of the CPU fans on my Compaq Presario laptop running Ubuntu 9.10 seems to have bit the dust. The fan is deep within the case and I intend to replace the laptop in the next 6 months so it's not worth replacing it. I have the laptop on a cooling pad and most of the time the system is fine, CPU temps around 90°-110°F. Occasionally, however, I'm seeing random lockups which I believe is due to the system overheating. How can I configure the system to: Lower the CPU speed when the temperature reaches a certain level? (I.E. 110°F) Shutdown the system when the tempature reaches a critical level? (And what would that be? 130°?)

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• What database is easy to maintain and manage in a cluster?

  - by Sanoj

  I'm looking for a database (DBMS) that is easy to scale out. I would like to have high availability so I need a multi-master cluster, where the data is replicated to two or more physical computers. I would also like to be able to start with one node (no replication), and then scale out to more nodes as needed without a reinstallation or downtime. I would like to have a DBMS that are easy to maintain and manage. It should be easy to add nodes, remove nodes, take live backup and monitor the use of resources. It doesn't have to be a relational database system, so a NoSQL is okey. And I would like to have a free version so I can test it in small scale and compare it with alternatives. What alternatives do I have?

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• (simple) linux HA with vmware vsphere?

  - by derhelge

  I hope my upcoming question is specific enough, and you are able and willing to support :-) We have several openSUSE VMs in an ESX-Cluster (three ESX-Servers) with an attached iSCSI-SAN. All of those Linux VMs are "single point of failure"-configured, which means in the case of a Web-Server: LAMP, storage, etc. everything on this machine. This was very simple and in case of a failure (in the last years: kernel panics or apache crashes) a simple reboot triggered by a script did it. But the problem is: How to upgrade/maintain the w(eb-)application or the underlying OS without downtime? This wasn't really managable and i did this in the early morning ;) How can i achieve a "simple" High-Availability Cluster now? I thought of: DRBD with heartbeat with 2 VMs. And for the storage a RDM (raw device mapped) LUN and change the read-write-permissions for both VMs. Is this a good idea? Anyone has a better solution?

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• Nginx reverse proxy apache2 High CPU load

  - by chillah

  my server: 2x Intel Xeon 5506 2.13GHz 24 GB DDR3 RAM Debian 5.0.8 64-bit My server CPU is aroung 90% at 600 users and around 6 page views per second. There are 2 Sites on the server. One Forum with low visitors and a Wordpress page. My Apache configurations: MaxKeepAliveRequests 100 KeepAliveTimeout 15 ServerLimit 500 <IfModule mpm_prefork_module> StartServers 5 MinSpareServers 5 MaxSpareServers 10 MaxClients 250 MaxRequestsPerChild 1000 </IfModule> <IfModule mpm_worker_module> StartServers 2 MaxClients 250 MinSpareThreads 25 MaxSpareThreads 150 ThreadsPerChild 25 MaxRequestsPerChild 0 </IfModule> <IfModule mpm_worker_module> StartServers 2 MaxClients 250 MinSpareThreads 25 MaxSpareThreads 150 ThreadsPerChild 25 MaxRequestsPerChild 0 </IfModule> <IfModule mpm_event_module> StartServers 2 MaxClients 150 MinSpareThreads 25 MaxSpareThreads 75 ThreadLimit 64 ThreadsPerChild 25 MaxRequestsPerChild 0 </IfModule>

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• NFS high CPU usage

  - by user269836

  Hello, I have a very strange issue. I have next server: Intel(R) Xeon(TM) MP CPU 3.16GHz cat /proc/cpuinfo | grep proce | wc -l 8 free -m total used free shared buffers cached Mem: 28203 27606 596 0 10789 9714 -/+ buffers/cache: 7103 21100 Swap: 24695 0 24695 RAID card *-storage description: RAID bus controller product: MegaRAID vendor: LSI Logic / Symbios Logic physical id: 7 bus info: pci@0000:13:07.0 logical name: scsi2 version: 01 width: 32 bits clock: 66MHz capabilities: storage pm bus_master cap_list rom configuration: driver=megaraid latency=32 resources: irq:134 memory:d8ff0000-d8ffffff(prefetchable) memory:df600000-df60ffff(prefetchable) HDD: 10x148Gb SCSI U320 15k - RAID5 /dev/sdb1 807G 674G 93G 88% /storage /dev/sdb1 /storage ext4 defaults,usrjquota=aquota.user,grpjquota=aquota.group,jqfmt=vfsv0,noatime,nodiratime,noacl,errors=remount-ro 0 1 network cards ethtool -i eth0 driver: tg3 version: 3.116 firmware-version: 5704-v3.36, ASFIPMIc v2.36 bus-info: 0000:10:02.0 ethtool -i eth1 driver: tg3 version: 3.116 firmware-version: 5704-v3.36, ASFIPMIc v2.36 bus-info: 0000:10:02.0 ifconfig bond0 Link encap:Ethernet HWaddr 00:0f:1f:ff:d6:4d inet addr:192.168.15.71 Bcast:192.168.15.255 Mask:255.255.255.0 inet6 addr: fe80::20f:1fff:feff:d64d/64 Scope:Link UP BROADCAST RUNNING MASTER MULTICAST MTU:1500 Metric:1 RX packets:1062818202 errors:0 dropped:3918 overruns:0 frame:0 TX packets:1041317321 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:10000 RX bytes:258867684559 (241.0 GiB) TX bytes:396569192650 (369.3 GiB) this server running only nfs-kernel-server uname -a Linux nas2-backup 2.6.32-5-amd64 #1 SMP Sun Sep 23 10:07:46 UTC 2012 x86_64 GNU/Linux Debian 6. What do I have, once per day or two, LA goes up, it can be reached around LA: 40 but if I do: nfs-kernel-server restart. Every thing is OK. But on the next day or a little bit later, LA goes up again. Servers are connected to d-link dgs 1016d with 24 GBits ports. I have tried everything to find out what the problem is. Why it's happening, but still I can not resolve this issue. Any ideas on what is happening here?

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• ntpd on Fedora Core 6 with high negative time reset values

  - by Mark White

  The basic problem is we have a FC6 server instance running on a virtual machine, and the system time seems to have been slowly varying until it is now causing a problem. The server runs 24/7 and has been up for 155 days. It has been changed to show GMT, and reports the time as (example) 00:15:15 GMT whereas the actual time is 00:00:00 GMT. This is an offset of 915 seconds. selinux has been changed to 'setenforce 0' for testing and I am running as root. I stop the ntpd service and change the time in System|Administration|Date & Time. The time still shows the same with 'date' in bash. There are no error logs. I change the date with 'date --set' in bash. The response confirms the changed date. I run 'date' and the incorrect date is shown. There are no error logs. I start the ntpd service and /var/log/messages shows success with 'time reset -915.720139s'. The date remains unchanged. ntpq -p shows three three time servers all have offsets of around -915 seconds. I stop ntpd service and try 'ntpd -gqx' and get the same result as above - success, but a large negative time reset. I've tried varying combinations of the above, and a few more settings in System|Administration|Date & Time - no change. I just need to reset the system time to GMT. No offset. But I can't wait for ntpd to slew the time over the next few weeks. Any advice is welcome, cheers! Surely this shouldn't be this difficult... Mark...

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