Recently we installed CENTOS 4.4 on DELL 2650 server. We found CPU load always on 3 and up if we run "top" or "w" to check. There is NO application run on this server why CPU load so heavy?
======= messages from check up === %w 11:31:56 up 20:02, 3 users, load average: 3.06, 3.03, 3.00 USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT oracle pts/1 cdzppb1 10:14 1.00s 0.08s 0.01s vim clone.sql oracle pts/2 tomcat2 10:46 5:13 0.05s 0.00s login -- oracle oracle pts/3 hmh6b1 11:26 0.00s 0.04s 0.00s w
%top|head -10
top - 11:32:09 up 20:03, 3 users, load average: 3.04, 3.03, 3.00 Tasks: 109 total, 1 running, 106 sleeping, 0 stopped, 2 zombie Cpu(s): 0.2% us, 0.1% sy, 0.0% ni, 99.6% id, 0.1% wa, 0.0% hi, 0.0% si Mem: 12196892k total, 8735360k used, 3461532k free, 78508k buffers Swap: 2040244k total, 0k used, 2040244k free, 8348352k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1 root 16 0 2564 528 452 S 0 0.0 0:00.92 init
2 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/0
3 root 34 19 0 0 0 S 0 0.0 0:00.00 ksoftirqd/0
%sar -u 5 5 Linux 2.6.9-42.ELsmp 05/08/2007
11:32:26 AM CPU %user %nice %system %iowait %idle 11:32:31 AM all 0.05 0.00 0.05 0.05 99.85 11:32:36 AM all 0.05 0.00 0.05 0.00 99.90 11:32:41 AM all 0.05 0.00 0.10 0.00 99.85 11:32:46 AM all 0.05 0.00 0.05 0.00 99.90 11:32:51 AM all 0.00 0.00 0.05 0.00 99.95 Average: all 0.04 0.00 0.06 0.01 99.89
%sar -q 5 5 Linux 2.6.9-42.ELsmp 05/08/2007
11:32:58 AM runq-sz plist-sz ldavg-1 ldavg-5 ldavg-15 11:33:03 AM 1 112 3.02 3.02 3.00 11:33:08 AM 1 112 3.02 3.02 3.00 11:33:13 AM 1 112 3.01 3.02 3.00 11:33:18 AM 1 112 3.01 3.02 3.00 11:33:23 AM 1 112 3.01 3.02 3.00 Average: 1 112 3.01 3.02 3.00
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