httpd processes and server load

[babakb]

Hi,
Occasionally I see some resource intensive httpd processes which spike up the server load for a while. However it's hard to know which web site they belong to because they register under user 'nobody'. Anyone have any tips on finding out which site triggered the httpd process(es)?

Thanks.

[xerophyte]

here is a way to find out

Take the process id from top then

grep $(lsof -p PID | grep cwd | awk '{print $9}' | awk -F '/' '{ print $3 }') /etc/userdomains

on the above code replace the PID with process id, it will give domain name

hope that helps

[Kailash1]

Thanks,

It worked for me.

Kailash

[babakb]

xerophyte,
WOW! That was the single most useful line of script I've ever encountered. Works amazing. I was just getting my feet wet with lsof and taking it from there. Yours takes me from A to Z in one line, genius!

[SpringChicken]

I would like to post my compliments to xerophyte also. Really amazingly helpful. I've been able to pinpoint and correct a number of faulty scripts on sites.

I am curious about the possibility of creating a log from this info for all processes running above 5 %CPU ? Would someone know how to do this ?

thanks again for sharing xerophyte

[babakb]

Originally Posted by SpringChicken

I would like to post my compliments to xerophyte also. Really amazingly helpful. I've been able to pinpoint and correct a number of faulty scripts on sites.

I am curious about the possibility of creating a log from this info for all processes running above 5 %CPU ? Would someone know how to do this ?

thanks again for sharing xerophyte

Good idea. You could write a small script (PHP would do) that extracts the output of the CPU & PID columns from a 'ps' and logs the user for those httpd processes which CPU >5%. Then set it up to run as a cron every few minutes. If I find the time I'll try to write up such script, shouldn't be too hard.

[babakb]

I'm thinking it would be better to show the file being accessed by the httpd process. That way we know which script is eating up the resources. Any ideas on which parameters to modify on xerophytes line of script?

[Spiral]

Originally Posted by babakb

Hi,
Occasionally I see some resource intensive httpd processes which spike up the server load for a while. However it's hard to know which web site they belong to because they register under user 'nobody'. Anyone have any tips on finding out which site triggered the httpd process(es)?

Thanks.

1) I would upgrade to phpSuExec or SuPHP so that scripts no longer run as "nobody"

2) When you note higher loads, it's a good idea to go ahead and login to WHM and
check your "Apache Status" which will show you what files are currently being accessed
on your web server and give you a clue where to look.

3) In SSH, you can follow up and go to /etc/httpd/domlogs and review the access logs
for those sites you noted as the most active in WHM's "Apache Status"

4) If you run "top" in SSH, you can see which processes are the most active and type
"m" to sort by memory usage or "p" to sort by cpu usage. The process ID shown
in "ps" or in "top" can be matched up to the process ID in your apache status too.

[babakb]

Spiral, thank you, those are great tips

[useradmin]

HI,


Apache is taking load more then 600 cpu but apache status or proc show like tihs.

rwxrwxrwx 1 root root 0 May 1 06:18 cwd -> /
lrwxrwxrwx 1 root root 0 May 1 06:18 cwd -> /
lrwxrwxrwx 1 root root 0 May 1 06:18 cwd -> /
lrwxrwxrwx 1 root root 0 May 1 06:18 cwd -> /
lrwxrwxrwx 1 root root 0 May 1 06:18 cwd -> /
lrwxrwxrwx 1 root root 0 May 1 06:18 cwd -> /
lrwxrwxrwx 1 root root 0 May 1 06:18 cwd -> /
lrwxrwxrwx 1 root root 0 May 1 06:18 cwd -> /
lrwxrwxrwx 1 root root 0 May 1 06:18 cwd -> /
lrwxrwxrwx 1 root root 0 May 1 06:18 cwd -> /
lrwxrwxrwx 1 root root 0 May 1 06:18 cwd -> /
lrwxrwxrwx 1 root root 0 May 1 06:18 cwd -> /

how to trace such load?