no 'fam' process running On Mon, 2005-12-05 at 18:33 +0200, Tomas Kuliavas wrote: > >>> > >>> > >>> We are using squirrelmail since 2 years in our company but we are now > >>> encountering some hard performance decrease. Our mail system is > >>> composed by one server with next features : > >>> > >>> Motherboard : 2 * CPU AMD Athlon MP 1800+ > >>> Memory : 1 G0 DDR > >>> SCSI : 1 Controller Adaptec 5400s > >>> HD's : RAID-5 with 4 * 18 G0 15,3 RPM > >>> > >>> > >>> > >>> OS : FreeBSD 4.11 > >>> Apache 1.3.33 > >>> PHP 4.3.x > >>> Squirrelmail 1.4.x > >>> FileSystem : UFS > >>> Server side sort : True > >>> Courrier- Imap > >>> > >>> > >>> > >>> Everything ran fine untill we got less than 2000 mails per folder. At > >>> this time I began by trying to optimize the system. So I tried to : > >>> > >>> > >>> - increase the PHP memory > >>> - I changed 'Server side sort' to true > >>> > >>> > >>> > >>> This increased a bit the performance but not in such a miracle way. > >>> The > >>> problem is we are now 10 users to use this system and we got more than > >>> 30 > >>> folders with more 20.000 mails ( !!! for each folder !!! ). Last week > >>> I > >>> made some statistics on the system and the current situation is : > >>> > >>> - 1.300.000 mails > >>> - 10 users > >>> - folders with lots of entries : between 1.000 and 25.000 > >>> - when we click on a folder to list the headers it take some 15-20 > >>> seconds and the CPU activity increase until 100% and it happens > >>> sometimes the host completely freezes. > >>> > >>> So I googled a lot to find some information on optimizing mail system > >>> on Unix systems and found next ideas. > >>> > >>> > >>> > >>> - It seems RAID-5 is not the best solution for a mail system and the > >>> solution sould be to use a RAID-0 ??? - It seems that it would be nice > >>> to take the average mail size and to adapt the block filesystem factor > >>> with this value ... so is UFS the right system for this ??? - We are > >>> only using FreeBSD for our server farm but is this system the real > >>> right choice for a mail system or do we have to choose another one ... > >>> Linux, ... ??? - It > >>> seems that it would be possible to specifically optimize filesystem > >>> for mail servers with Reiserfs and/or XFS ... but with which value ??? > >>> > >>> > >>> So, before changing anything on our mail system, could you please > >>> give me all kind of information to optimize/install mail servers on > >>> Unix's ( > >>> Linux, FreeBSD, ... ), filesystems, PHP Values for mail servers. > >>> > >> > >> Could you show your courier-imap capability string or check if it > >> compiled with IDLE extension and famd support? > >> > > > > * OK [CAPABILITY IMAP4rev1 UIDPLUS CHILDREN NAMESPACE > > THREAD=ORDEREDSUBJECT THREAD=REFERENCES SORT QUOTA IDLE ACL ACL2=UNION > > STARTTLS] Courier-IMAP ready. Copyright 1998-2005 Double Precision, Inc. > > See COPYING for distribution information. > > Is famd running? >
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