Hi all
I have a box with Centos 4 and qmail with all pathches. since Last month i have had twice the same problem. The process kswapd0 uses all my resources of CPU and RAM memory and the consequence is that my local queue grow up and the box go slow too.
The first time i guess the problem was the version of the kernel, so i did an upgrade form kernel.i686 2.6.9-5.0.3.EL to kernel.i686 2.6.9-5.0.5.EL
apparently the problem was solved but today the problem came again. The following snapshot shows the situation:
top - 10:53:48 up 16 days, 20:05, 1 user, load average: 119.27, 116.16, 114.33 Tasks: 528 total, 13 running, 515 sleeping, 0 stopped, 0 zombie Cpu(s): 5.4% us, 89.4% sy, 0.0% ni, 0.3% id, 4.8% wa, 0.0% hi, 0.1% si Mem: 2075012k total, 2073404k used, 1608k free, 71056k buffers Swap: 4192924k total, 4192924k used, 0k free, 36380k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 60 root 17 0 0 0 0 D 75.4 0.0 585:22.79 kswapd0 2164 root 15 0 1736 484 432 S 31.0 0.0 31:57.07 couriertcpd 16334 vpopmail 19 0 2660 804 668 R 24.7 0.0 0:01.69 imapd 2158 root 15 0 3264 488 432 S 23.4 0.0 1:17.51 couriertcpd 32608 apache 16 0 21604 8440 3016 R 15.5 0.4 1:38.09 httpd 15284 vpopmail 18 0 4384 1032 760 R 14.9 0.0 0:08.32 vdelivermail
I really do not know what thing should i do for solve this problem
thanks in advance
Mario