Find which php scripts cause high CPU with php-cgi

Posted by Oli on Server Fault See other posts from Server Fault or by Oli
Published on 2010-05-20T09:08:30Z Indexed on 2010/05/20 9:11 UTC
Read the original article Hit count: 455

Filed under:

cpu

|

php-cgi

|

Wordpress

Background: I maintain a server for a client who has half a dozen Wordpress sites on. They all have the W3 Total Cache plugin installed and eAcellerator is installed (might be APC). All the PHP sites run through a single batch of fastcgi php-cgi processes (it's actually php-fpm but I'm not sure if that makes a difference).

Problem: php-cgi's CPU usage is quite high. Not terminally high but high enough to raise an eyebrow. The client wants to add more sites in the future and I want to avoid becoming CPU limited if I can help it.

Question: Is there any way I can find the scripts or even just requests that are causing the high CPU. I realise I might not be able to do anything with the results but it would give me a chance.

© Server Fault or respective owner

Related posts about cpu

Speedstep and Intel x5570?

as seen on Server Fault - Search for 'Server Fault'
Hi, My new server has 2 x X5570 CPUs. Now here is the output of grep -i hz /proc/cpuinfo model name : Intel(R) Xeon(R) CPU X5570 @ 2.93GHz cpu MHz : 1600.231 model name : Intel(R) Xeon(R) CPU X5570 @ 2.93GHz cpu MHz : 1600.231 model name : Intel(R) Xeon(R) CPU … >>> More
VMware ESXi - varying CPU time (CPU reservation)

as seen on Server Fault - Search for 'Server Fault'
Hello! I'm running FreeBSD 7.2 under VMware ESXi 3.5. Host has 2 physical CPUs and the BSD box is currently the only running VM. Only one virtual CPU is assigned to the VM. When measuring CPU time of a specific program, I get very different results from time to time. Processor usage is reported… >>> More
How to calculate CPU % based on raw CPU ticks in SNMP

as seen on Server Fault - Search for 'Server Fault'
According to http://net-snmp.sourceforge.net/docs/mibs/ucdavis.html#scalar_notcurrent ssCpuUser, ssCpuSystem, ssCpuIdle, etc are deprecated in favor of the raw variants (ssCpuRawUser, etc). The former values (which don't cover things like nice, wait, kernel, interrupt, etc) returned a percentage… >>> More
disparity between `top`'s given CPU % and process CPU usage total

as seen on Super User - Search for 'Super User'
I've noticed that there are sometimes (large) differences between the reported total CPU usage and a summation of the per-process CPU utilization given by apps like top and wmtop. As an example: I recently ran a git filter-branch --index-filter on a fairly large repo, with the index-filter command… >>> More
How to read oom-killer syslog messages?

as seen on Server Fault - Search for 'Server Fault'
I have a Ubuntu 12.04 server which sometimes dies completely - no SSH, no ping, nothing until it is physically rebooted. After the reboot, I see in syslog that the oom-killer killed, well, pretty much everything. There's a lot of detailed memory usage information in them. How do I read these logs… >>> More

Related posts about php-cgi

PHP cgi locks up and times out.

as seen on Server Fault - Search for 'Server Fault'
I've got a dozen wordpress sites hosted on a nginx/php-cgi setup. After a variable amount of time (usually not that long, and occasionally very fast) PHP locks up and after 2 minutes (the timeout I set in nginx), it get a 504 timeout. I've tried everything I can think of. I've been using an init… >>> More
Find which php scripts cause high CPU with php-cgi

as seen on Server Fault - Search for 'Server Fault'
Background: I maintain a server for a client who has half a dozen Wordpress sites on. They all have the W3 Total Cache plugin installed and eAcellerator is installed (might be APC). All the PHP sites run through a single batch of fastcgi php-cgi processes (it's actually php-fpm but I'm not sure if… >>> More
Tomcat dying silently on regular basis

as seen on Server Fault - Search for 'Server Fault'
My tomcat (6.0.32, Java Sun 1.6.0_22-b04 on Ubuntu 10.04) keeps crashing multiple times daily without any specific output in catalina.out. This usually happens on high load (see top output). Update: The pid-file is properly removed when this happens. Update 2: No CATALINA_OPTS set, _JAVA_OPTS are: export… >>> More
apache2 how to trace caller of SIGTERM

as seen on Server Fault - Search for 'Server Fault'
I have a dex x64 on a virtualbox win7pro host. My apache2 will stop responding after a page request or other activity such as upload via ftp. The php.cgi becomes non responsive and a restart is required any help tracking down the culprit sending the SIGTERM would be much appreciated. thx Art my… >>> More
multiple php compiler on single apache installation

as seen on Server Fault - Search for 'Server Fault'
elloo, i have some old php scripts which runs on php-5.2.x and the current server has php-5.3.x. to get around this problem,i have got two options one is to downgrade php-5.3.x or install php-5.2.x and php-5.3.x at the same time where php-5.2.x serve cgi script. i have decided go for the second option i… >>> More