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Operating Systems AIX AIX5L diagnostic process question Post 302314963 by sink on Monday 11th of May 2009 06:24:59 AM
Old 05-11-2009
Thanks it does help.

We have had the storage team checking everything they can, with no positive results.

These symptoms of degraded IO from 4-6AM just started after the box was rebooted.
I see the same symptoms on many AIX boxes to one degree or another during the same
time period. The degraded performance disappears after 6AM.
We have been trying to align the symptoms with some disk intensive process that happens somewhere, but no smoking gun yet. Will keep trying.

Another strange thing is I do not see the same symptoms from Sun Sparc Solaris boxes
connected to the same SAN during that same 4-6AM period of time, but those boxes
have fewer databases on them too.
 

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GONG(1) 						      General Commands Manual							   GONG(1)

NAME
gong - evaluate process performance SYNOPSIS
gong [-f] [-a] process-id DESCRIPTION
Gong is used to evaluate the performance of a process that is in execution. The process-id is the process number of the process whose performance is to be evaluated. The evaluation is performed by a set of three ``panelist'' routines, each of which analyzes one aspect (time, space, and tonality) of the performance of the process. If any of these routines is not amused by the performance, the process being analyzed is sent the gong(2) signal. In addition, the process-id of the eval- uated process is written on the standard gong, for possible future corrective action. (It is suggested that the standard gong be an audi- ble alarm for proper effect.) It is expected that after being gong(2)ed, the process will promptly commit suicide. The -f keyletter argument indicates that gong is to invoke flog(1) with the unmerciful argument if the process does not respond to gong(2)ing. In the absence of this argument, the process is continuously gong(2)ed, which may lead to the process becoming a deaf zombie. The -a keyletter argument indicates that if all three of the panelist routines gong(2) a process, the process should be unmercifully flog(1)ged whether or not the -f keyletter is supplied. FILES
/dev/ding.dong is the standard gong. SEE ALSO
On the Applicability of Gonging to the Performance and Merit Review Process, Journal of Irreproducible Results, vol. 263, issue 19, pp. 253-307. BUGS
If the named process does not exist, it is possible that gong will attempt an evaluation of itself, which may lead to a condition known as compounded double ringing (see echo(1)). Therefore, it is recommended that gong be used with extreme care. GONG(1)
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