System To Control Server Load On Cpanel
a good method to have processes controlled in the resources they use, in a shared cpanel environment?
For example, it appears that the cpanel backup (compressed) made the load skyrocket to beyond 60% cpu and 95% memory usage today, and this server is beefy to begin with.
I want some system to kill processes immediately if they exceed X amount of resources or kill processes that spiral out of control (X amount of processes from same user).
I'd like to be alerted of this action as well.
How can I set this up?
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I'm getting an almost constant server load of between 0.8 and 1.9 Its usually about 1.2 - 1.6 but peaks at 3.0. It might just be traffic but can anyone check the output from top and see if it looks ok top - 17:10:59 up 93 days, 23:01, 2 users, load average: 2.16, 1.31, 1.12 Tasks: 116 total, 1 running, 114 sleeping, 0 stopped, 1 zombie Cpu(s): 11.5% us, 3.5% sy, 0.0% ni, 76.7% id, 8.4% wa, 0.0% hi, 0.0% si Mem: 1027556k total, 1000260k used, 27296k free, 90060k buffers Swap: 2048276k total, 160k used, 2048116k free, 568264k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 29795 root 16 0 29364 26m 2048 S 6.6 2.6 0:27.34 spamd 305 root 16 0 0 0 0 S 1.7 0.0 719:35.17 kjournald 26305 mailnull 17 0 9608 3108 2036 S 1.0 0.3 0:00.03 exim 722 named 25 0 63124 27m 2032 S 0.7 2.8 223:21.30 named 14110 nobody 16 0 26244 15m 3704 S 0.3 1.5 0:25.16 httpd 26376 root 16 0 2044 988 760 R 0.3 0.1 0:00.02 top 1 root 16 0 1732 528 452 S 0.0 0.1 2:03.99 init 2 root 34 19 0 0 0 S 0.0 0.0 1:33.01 ksoftirqd/0 3 root 5 -10 0 0 0 S 0.0 0.0 3:18.70 events/0 4 root 5 -10 0 0 0 S 0.0 0.0 0:00.00 khelper 5 root 15 -10 0 0 0 S 0.0 0.0 0:00.00 kacpid 21 root 5 -10 0 0 0 S 0.0 0.0 16:38.77 kblockd/0 42 root 12 -10 0 0 0 S 0.0 0.0 0:00.00 aio/0 22 root 15 0 0 0 0 S 0.0 0.0 0:00.00 khubd 41 root 16 0 0 0 0 S 0.0 0.0 16:48.41 kswapd0 188 root 25 0 0 0 0 S 0.0 0.0 0:00.00 kseriod 300 root 6 -10 0 0 0 S 0.0 0.0 0:00.00 ata/0 1351 root 6 -10 1800 500 412 S 0.0 0.0 0:00.01 udevd 1832 root 6 -10 0 0 0 S 0.0 0.0 0:00.00 kauditd 1879 root 6 -10 0 0 0 S 0.0 0.0 0:00.00 kmirrord 1897 root 15 0 0 0 0 S 0.0 0.0 0:00.00 kjournald 2808 root 16 0 4428 532 272 S 0.0 0.1 0:36.65 rpc.idmapd 2880 root 18 0 3244 496 416 S 0.0 0.0 0:00.00 acpid 2976 root 17 0 3032 772 624 S 0.0 0.1 0:00.02 xinetd 3021 root 16 0 6084 936 536 S 0.0 0.1 0:11.98 crond 3047 dbus 16 0 3496 956 812 S 0.0 0.1 0:00.02 dbus-daemon-1 3056 root 16 0 8096 4840 1512 S 0.0 0.5 6:22.22 hald 3063 root 17 0 2932 1252 972 S 0.0 0.1 0:00.00 login 3064 root 16 0 2020 448 388 S 0.0 0.0 0:00.00 mingetty 3065 root 16 0 2084 448 388 S 0.0 0.0 0:00.00 mingetty 3066 root 18 0 2964 448 388 S 0.0 0.0 0:00.00 mingetty 3067 root 18 0 2380 448 388 S 0.0 0.0 0:00.00 mingetty 3068 root 18 0 1580 448 388 S 0.0 0.0 0:00.00 mingetty 3682 root 16 0 5836 1404 1180 S 0.0 0.1 0:00.00 bash 3949 root 16 0 0 0 0 S 0.0 0.0 66:21.77 kjournald 13066 root 16 0 2052 548 456 S 0.0 0.1 13:59.70 syslogd 13070 root 16 0 2028 384 316 S 0.0 0.0 0:00.05 klogd 3404 root 0 -20 0 0 0 S 0.0 0.0 3:02.75 loop0 3405 root 15 0 0 0 0 S 0.0 0.0 0:24.35 kjournald 8596 root 17 0 12484 8032 1080 S 0.0 0.8 1:04.24 chkservd 2051 root 16 0 5172 1136 832 S 0.0 0.1 1:56.43 sshd 26330 root 16 0 6952 1392 1116 S 0.0 0.1 0:00.19 pure-ftpd 26333 root 15 0 6280 896 764 S 0.0 0.1 0:00.03 pure-authd 5719 root 16 0 18784 9.8m 3620 S 0.0 1.0 1:13.73 httpd 30206 root 15 0 0 0 0 S 0.0 0.0 14:45.38 pdflush 12376 root 16 0 8372 4744 692 S 0.0 0.5 0:06.09 cpbandwd 12456 root 39 19 21524 15m 1732 S 0.0 1.6 19:35.48 cpanellogd 12530 mailman 16 0 11532 5016 920 S 0.0 0.5 0:00.00 mailmanctl 12539 mailman 16 0 10228 6700 2620 S 0.0 0.7 1:41.93 python2.4 12540 mailman 16 0 10760 6636 2588 S 0.0 0.6 1:48.33 python2.4 12541 mailman 16 0 11052 6636 2588 S 0.0 0.6 1:42.71 python2.4 12542 mailman 16 0 11720 6700 2620 S 0.0 0.7 1:41.73 python2.4 12543 mailman 16 0 10716 6720 2620 S 0.0 0.7 1:41.25 python2.4
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Server Load
Server load is too high, what could be the reason? top - 02:45:31 up 15 min, 1 user, load average: 2.38, 9.92, 8.01 Tasks: 148 total, 3 running, 145 sleeping, 0 stopped, 0 zombie Cpu(s): 35.2% us, 5.3% sy, 0.0% ni, 21.6% id, 37.9% wa, 0.0% hi, 0.0% si Mem: 1027556k total, 1017364k used, 10192k free, 122912k buffers Swap: 2040244k total, 68k used, 2040176k free, 215112k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 3350 popuser 16 0 33500 27m 2328 R 10.0 2.7 0:03.81 spamd 3359 popuser 18 0 33400 27m 2324 S 8.3 2.8 0:04.71 spamd 3202 apache 16 0 98372 57m 6208 S 6.0 5.7 0:02.58 httpd 3713 apache 16 0 92860 53m 5732 S 6.0 5.3 0:02.39 httpd 3206 apache 15 0 102m 62m 5752 S 2.0 6.2 0:01.98 httpd 2730 mysql 16 0 398m 59m 4356 S 0.7 5.9 0:04.14 mysqld 5923 apache 16 0 93344 53m 5192 S 0.7 5.3 0:01.61 httpd 3182 apache 16 0 92948 53m 6084 S 0.3 5.4 0:01.66 httpd 3191 root 15 0 30084 24m 2380 S 0.3 2.5 0:00.80 spamd 3195 apache 16 0 93736 54m 5500 S 0.3 5.4 0:01.54 httpd 3208 apache 15 0 98.2m 59m 5936 S 0.3 5.9 0:02.60 httpd 3212 apache 15 0 93176 54m 6040 S 0.3 5.4 0:01.96 httpd 3298 apache 15 0 96252 56m 5788 S 0.3 5.7 0:02.87 httpd 6170 apache 15 0 99648 59m 5680 S 0.3 5.9 0:01.05 httpd 1 root 16 0 2276 552 472 S 0.0 0.1 0:00.68 init 2 root 34 19 0 0 0 S 0.0 0.0 0:00.00 ksoftirqd/0 3 root 5 -10 0 0 0 S 0.0 0.0 0:00.00 events/0 4 root 8 -10 0 0 0 S 0.0 0.0 0:00.00 khelper 5 root 15 -10 0 0 0 S 0.0 0.0 0:00.00 kacpid 19 root 5 -10 0 0 0 S 0.0 0.0 0:00.00 kblockd/0 37 root 15 0 0 0 0 S 0.0 0.0 0:00.00 pdflush 40 root 11 -10 0 0 0 S 0.0 0.0 0:00.00 aio/0 20 root 15 0 0 0 0 S 0.0 0.0 0:00.00 khubd 39 root 16 0 0 0 0 S 0.0 0.0 0:00.08 kswapd0 186 root 25 0 0 0 0 S 0.0 0.0 0:00.00 kseriod 295 root 15 0 0 0 0 S 0.0 0.0 0:00.33 kjournald 1373 root 6 -10 3452 452 380 S 0.0 0.0 0:00.01 udevd 1606 root 6 -10 0 0 0 S 0.0 0.0 0:00.00 kauditd 1648 root 6 -10 0 0 0 S 0.0 0.0 0:00.00 kmirrord 1672 root 19 0 0 0 0 S 0.0 0.0 0:00.00 kjournald 1673 root 19 0 0 0 0 S 0.0 0.0 0:00.00 kjournald 2360 root 15 0 1748 548 456 S 0.0 0.1 0:00.28 syslogd 2364 root 16 0 2332 380 316 S 0.0 0.0 0:00.00 klogd 2787 postgres 16 0 20184 2048 1764 S 0.0 0.2 0:00.00 postmaster 2790 postgres 18 0 10984 472 184 S 0.0 0.0 0:00.00 postmaster 2791 postgres 18 0 9992 560 232 S 0.0 0.1 0:00.00 postmaster 2799 root 15 0 0 0 0 S 0.0 0.0 0:00.05 pdflush 2822 root 16 0 5128 752 628 S 0.0 0.1 0:00.01 couriertcpd
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I built an online application using PHP / MySQL and it's pretty optimized (it's a very simple app). I've inadvertently picked up a huge client that could represent a few 1,000 "posts" per minute. The process goes like this: Consumer posts mobile data -> third party receives data -> third party sends data to my server -> my php script throws the data into a database. I've got about a month to prepare things for these nightly "posts" before it's a real-life affair. My questions are: 1) How can I "stress" or "load" test my machine and script to see what I'm up against. 2) What is my cheapest option for "redundancy" (Would something like MediaTemple's MySQL Grid products be a fix?) When I say a few thousand posts per minute - each one is around 350 bytes. I'm sure you may be wondering if I've bitten off more than I can chew - yea kind of but I made it perfectly clear to the client about my uncertainty and they are willing to give me benefit-of-a-doubt since I'm a very hard worker, very easy to deal with and loyal - not to mention my product is unlike any other that we have seen.
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Serious Server Load
I have some serious server load issues on one of my web servers... Hardware: Intel Pentium D 3.40GHz 1024 MB DDR RAM Software: RH Linux with 2.6.9-42.0.3.ELsmp kernel cPanel with most recent Apache and PHP 5.2.x Process list (top output, on a regular moment): [url] When everything is running normal (read: server load below 2) there's between 100 and 300 MB of free memory. Though sometimes (this happens about 2 times per day, at random times of the day) the server load dramatically increases. I wrote a script (the chkApache.sh process in the top list) that constantly checks the server load and if it raises about 4, it will check if the sum of all httpd processes are consuming too much CPU or Memory. In this case, it will force a httpd restart... I need this to prevent Apache from crashing my server almost daily. If I let Apache do its thing without this script, it will happen that tons of httpd processes (50 and up) take in all the RAM and server load increases to 100 or more and the eventually I need to reboot the server using the SoftLayer control panel. That chkApache script I wrote also sends me a detailed report of the state of the server when it needs to restart Apache, here's a report of an event that occurred today (includes server load info, memory info, top list, httpd processes info, netstat, etc): [url] In this case you would think that someone is attacking the youthforums.co.uk domain but I doubt that's the case... It doesn't always happen with that site, in fact I can't seem to find a pattern in the Apache status page so I don't think a single account is causing this... Today I also used the Apache JMeter to "stress test" my server. I was shocked when I saw how easy it is to use that tool in order to make my server crash... I used 10 threads loading one PHP page (that makes some MySQL queries) and made a loop that kept requesting that information, with 10 connections at a time... The server load rapidly increased to 30 and above... I think it's unacceptable that something like this can happen so easilly... I tried several things with my Apache configuration settings... Here's what I have at the moment: Code: RLimitMEM 67108864 RLimitCPU 60 RLimitNPROC 30 Timeout 5 KeepAlive On MaxKeepAliveRequests 50 KeepAliveTimeout 2 MinSpareServers 5 MaxSpareServers 10 StartServers 5 MaxClients 40 MaxRequestsPerChild 100 <IfModule mod_limitipconn.c> <Location /> MaxConnPerIP 3 NoIPLimit image/* </Location> </IfModule> LoadModule rewrite_module libexec/mod_rewrite.so LoadModule expires_module libexec/mod_expires.so LoadModule bwlimited_module libexec/mod_bwlimited.so LoadModule bytes_log_module libexec/mod_log_bytes.so LoadModule auth_passthrough_module libexec/mod_auth_passthrough.so LoadModule php5_module libexec/libphp5.so LoadModule security_module libexec/mod_security.so LoadModule evasive_module libexec/mod_evasive.so LoadModule limitipconn_module libexec/mod_limitipconn.so Does anyone have an idea what's wrong here? Anything I can do to get more detailed information on what's causing this? I've been on this problem for weeks now but I can't seem to find any proper solution. In case it matters I'm also running: SIM, RPM, BFD, APF and SPRI
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how the load on your web hosting machines looks like. I've seen companies that keep the load at values of 10-15 units and the server is still responsive. Though there might be different reasons for the high load and it's a sure indication for an upcoming problem it doesn't seem normal to have this high load on a hosting server. (well actually it would if the machine was running on 16 cpus but it's a normal dual xeon woodcrest for example).
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