[horde] associating PIDS to requests? (was Re: runaway httpd processes?)

[Nuno Loureiro]

On Jan 29, 2007, at 22:22, Liam Hoekenga wrote:

>> 20:19:59 up 29 days,  3:14,  1 user,  load average: 55.16, 38.82,  
>> 23.92
>>  412 processes: 403 sleeping, 8 running, 1 zombie, 0 stopped
>>  CPU states:  82.5% user,  17.5% system,   0.0% nice,   0.0% idle
>>  Mem:   3883356K total,  3865044K used,    18312K free,   207128K  
>> buffers
>>  Swap:   979924K total,    61724K used,   918200K free,  2434148K  
>> cached
>>
>>    PID USER     PRI  NI  SIZE  RSS SHARE STAT %CPU %MEM   TIME  
>> COMMAND
>>   4858 webmail   25   0 29196  28M 24876 R    71.7  0.7  17:39 httpd
>>  27948 webmail   25   0 31888  31M 27104 R    13.5  0.8   6:20 httpd
>>
>>  PID   REQUEST
>>  4858  GET /kronolith/year.php?year=1104543267 HTTP/1.1
>>  27948 GET /kronolith/year.php?year=1199151268 HTTP/1.1
>
> Quick question... is there some top like utility that returned this  
> output?  Or was this generated by searching log files and comparing  
> PIDs to log entries?
> I'd love an easy way to associate PIDs to requests!

I'm not sure wether the original was written by me or not, anyway.

I got the association between PIDs and Requests through Apache  
"server-status" (mod_status or something).
So what I usually do is a 'top' and a "lynx -dump http://my.server/ 
server-status" in separate windows. Usually I run top first, then  
lynx and I press 'space, q' on 'top' so I'm almost sure that the PIDs  
reflect the Requests in question (remember that in most  
configurations one apache process processes several requests).

If you run Linux and you want to know what user is being served by  
that request, you can also do a "ls -l /proc/<pid>/fd" and edit the  
session file.

Happy hacking.

----
Nuno Loureiro <nuno at co.sapo.pt>
PTMail - DTP/APS/UNX - PT.COM - Portugal Telecom

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