Re[2]: High system in %system load .

2008-11-19 Thread igor . lyapin
Hello Ivan,


 Where is the system busy? For start, try to collect information about
 what are your processes doing - for example from top(1).

4 usersLoad  1.43  1.46  1.27  Nov 19 13:14

Mem:KBREALVIRTUAL   VN PAGER   SWAP PAGER
Tot   Share  TotShareFree   in   out in   out
Act 1367684   15208  444773227660  201372  count
All 1424692   26352  9032876   107292  pages
Proc:Interrupts
  r   p   d   s   w   Csw  Trp  Sys  Int  Sof  Flt467 cow9218 total
  2   9 282   13k 7775  36k 1218  350 7386   6832 zfodata0 irq14
  ozfod   286 atapci1 19
30.3%Sys   0.4%Intr  6.7%User  0.0%Nice 62.6%Idle%ozfod  2014 cpu0: time
|||||||||||   daefr   932 bge0 256
===  1337 prcfr  2014 cpu1: time
   146 dtbuf 7420 totfr  1986 cpu3: time
Namei Name-cache   Dir-cache10 desvn  react  1986 cpu2: time
   Callshits   %hits   % 85727 numvn  pdwak
  139486  138964 100 300   0 25001 frevn  pdpgs
  intrn
Disks   ad4   ad6  ad10   ar0  503544 wire
KB/t   0.00  0.00  0.00 13.27 1363312 act
tps   0 0 073 1949608 inact
MB/s   0.00  0.00  0.00  0.95  168476 cache
%busy 0 0 012   32896 free
   219632 buf



-- 
Best regards,
 Gmail.com 

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Re[2]: High system in %system load [SOLVED]

2008-11-19 Thread Igor Lyapin
Hello Ivan,
Thank's Ivan you quite right this was problem with php session. Programmer set 
up in
script's 2 years of session life. It was about 460k files in /var/tmp.


 COMMAND
 55546 www  1  -40   198M 24912K ufs1   0:25 29.39% httpd
 55986 www  1  -40   198M 23228K ufs2   0:08 21.39% httpd
 56030 www  1  -40   199M 23400K ufs1   0:05 11.23% httpd

 Ok, high sys load in ufs state for me was often caused by PHP session
 storage. By default, PHP will store all session records in a single
 directory, which can grow to monstruous sizes. If this is also your
 case, here are some things to try:

 a) increase vfs.ufs.dirhash_maxmem to 10 MB or something like that (look
 at vfs.ufs.dirhash_mem to see if you're hitting the limit and if so,
 monitor it to see what your dirhash_maxmem limit should be)
 b) configure PHP to use sharded directory structure for sessions.




-- 
Best regards,
 Igor 

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