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About command top

whats the meaning of %CPU?

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
31550 drweb 25 0 352m 301m 736 R 99.6 14.9 5:08.07 drwebd.real
8380 popuser 16 0 7176 1172 932 S 4.8 0.1 0:00.14 imapd
8321 root 15 0 2336 1088 796 R 0.4 0.1 0:00.08 top
8379 root 15 0 4952 1832 1528 S 0.4 0.1 0:00.05 couriertls
14764 root 15 0 2336 1008 720 S 0.4 0.0 2:56.85 top
24297 root 15 0 5944 588 536 S 0.4 0.0 1:31.86 couriertcp

thanks

woolmilkporc

That's
The task's share of the elapsed CPU time since the last screen
update, expressed as a percentage of total CPU time.
In a true SMP environment, if 'Irix mode' is Off, top will operate in
´Solaris mode' where a task's cpu usage will be divided by the
total number of CPUs. You toggle 'Irix/Solaris' modes with the
'I' interactive command.
(from manpage)
wmp

TobiasHolm

Hi!

Remember to run the 'top' command as root if you want to see all processes from all users.

Regards, Tobias

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MikeGeig

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MikeGeig

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madunix

install sysstat to find more about CPU usage. If you are using SMP (Multiple CPU) system, use mpstat command to display the utilization of each CPU individually. You can display CPU activity, with sar.

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rajendraone

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madunix

Are you sure the AV scan it's not doing a scheduled background scan or updating his engine...?

VMWARE

ASKER

Thanks