[imp] system / imp tuning

[Michael Marziani]

The current stable version of php is 4.2.3.  I've heard of quite a few
improvements in that version over 4.1.2.  Could you provide more details
of how many users you serve/etc?  What kind of logging are you doing
within php.ini?  What php.ini did you use?  There are quite a few
performance-increasing things you can do within there.

-Michael

____________________________
Michael D. Marziani
Sr. Systems Administrator
Keller Williams Realty Int'l


> -----Original Message-----
> From: Colin Devine [mailto:devinec@sas.upenn.edu] 
> Sent: Wednesday, November 06, 2002 1:13 PM
> To: imp@lists.horde.org
> Subject: [imp] system / imp tuning
> 
> 
> Hello,
> 
> We recently upgraded our Horde/Imp install from horde 
> 1.2.6/imp 2.2.7 to 2.1/3.1.  Also included in this was an 
> upgrade to php-4.1.2.  Since then we notice that our apache 
> processes grow in the amount of memory they use as time 
> progresses, slowing down the server and IMP itself.  At the 
> start of the apache server they are ~7M but in about 24 hours 
> they are often ~25M in size.  This seems to me to indicate a 
> memory leak of some sort and I was wondering what the 
> collective knowledge base of this list had any ideas.  
> 
> I include my ideas as starting points.
> 
> 1) Restart the server every x hours, where x is at least 24.  
> We did this previously with the old horde/imp and perhaps 
> this was helping us more than we realized.
> 
> 2) Change MaxRequestsPerChild to maybe 5000-10000 instead of 
> 0 (0 being the child processes never die).
> 
> We are also investigating php accelerators, imap proxies, and 
> even multiple clustered webmail servers in an effort to load 
> balance and generally speed up IMP.
> 
> All thoughts comments and questions are encouraged.
> 
> Thanks and have a nice day.
> 
> --Colin Devine
> 
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