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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