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Full Discussion: performance
Top Forums UNIX for Advanced & Expert Users performance Post 302087628 by big123456 on Monday 4th of September 2006 05:36:35 AM
Old 09-04-2006
performance

Hi,
I have this on a AIX UNIX machine :
ps aux| head -20
USER PID %CPU %MEM SZ RSS TTY STAT STIME TIME COMMAND
root 516 23.7 0.0 12 15808 - A 19:38:15 903:13 wait
root 774 23.7 0.0 12 15808 - A 19:38:15 902:13 wait
root 1290 23.6 0.0 12 15808 - A 19:38:15 898:04 wait
root 1032 23.4 0.0 12 15808 - A 19:38:15 891:48 wait
my question is :
is it normal that the wait commands of root occupy 23.7% of CPU ? Or there is system problem on machine ?
Many thanks.
 

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wait(1) 						      General Commands Manual							   wait(1)

NAME
wait - await process completion SYNOPSIS
[pid] DESCRIPTION
If no argument is specified, waits until all processes (started with of the current shell have completed, and reports on abnormal termina- tions. If a numeric argument pid is given and is the process ID of a background process, waits until that process has completed. Other- wise, if pid is not a background process, exits without waiting for any processes to complete. Because the system call must be executed in the parent process, the shell itself executes without creating a new process (see wait(2)). Command-Line Arguments supports the following command line arguments: The unsigned decimal integer process ID of a command, whose termination is to wait for. WARNINGS
Some processes in a 2-or-more-stage pipeline may not be children of the shell, and thus cannot be waited for. SEE ALSO
csh(1), ksh(1), sh-posix(1), sh(1), wait(2). STANDARDS CONFORMANCE
wait(1)
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