Mogens
DENNIS WILLIAMS wrote:
Boris - I'm not surprised in your results. I wouldn't describe STATSPACK as
"brutal", but it is a significant hit, so you wouldn't want to start doing
snaps at 1 second intervals. STATSPACK does collect a LOT of data, and you
can adjust the amount of data collected with the level if you feel the need
to reduce the brutality. If you find you only need a few pieces of
information, you could write your own routines to collect just what you
need.
I have no idea why your system mode sees an impact. Perhaps someone who
has more systems experience can venture a guess. You might try several
measurements just in case you caught the system at a bad moment.
Dennis Williams
DBA, 80%OCP, 100% DBA
Lifetouch, Inc.
[EMAIL PROTECTED]
-----Original Message----- Sent: Thursday, June 05, 2003 4:05 PM To: Multiple recipients of list ORACLE-L
As subject line indicates standard (level 5) snapshots make "vmstat 1" or "sar -u 1 100" show 100% CPU utilization (75% system mode) for about 3 seconds.
Is this normal? Is statspack that brutal on CPU? And why would that be a system mode primarily?
Environment:
Oracle 9.2.0.2 on Mandrake 9.0 (2.4.19-16mdkenterprise) 2.4GHz uniprocessor P4 box, 1GB SDRAM
TIA, Boris Dali.
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