Thanks, John. Any insight as to why is it primarily the system mode CPU? I've seen high system mode CPU utilization in non-Oracle stuff (like NFS), but for Oracle I thought it should be primarily user mode?
Does Oracle's "CPU used by this session" represents user-, kernel-mode or both? And what about "c" in the raw traces? Thanks John, Boris Dali. --- John Kanagaraj <[EMAIL PROTECTED]> wrote: > Boris, > > The default statspack snapshot is at level 5, which > collects Top SQL (by > buffer and Phys reads, etc.) from the Shared pool, > and that would cause > significant latching for a large shared pool which > in turn results in a high > CPU usage. You could try a level 0 snapshot and look > at the CPU utilization > at that time... > > John Kanagaraj > Oracle Applications DBA > DBSoft Inc > (W): 408-970-7002 > > Disappointment is inevitable, but Discouragement is > optional! > > ** The opinions and statements above are entirely my > own and not those of my > employer or clients ** > > > > -----Original Message----- > > From: Boris Dali [mailto:[EMAIL PROTECTED] > > Sent: Thursday, June 05, 2003 2:05 PM > > To: Multiple recipients of list ORACLE-L > > Subject: statspack snapshots cause 3-4 sec of 100% > CPU utilization > > > > > > 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. > > > > > > > ______________________________________________________________ > > ________ > > Post your free ad now! http://personals.yahoo.ca > > -- > > Please see the official ORACLE-L FAQ: > http://www.orafaq.net > > -- > > Author: Boris Dali > > INET: [EMAIL PROTECTED] > > > > Fat City Network Services -- 858-538-5051 > http://www.fatcity.com > > San Diego, California -- Mailing list and > web hosting services > > > --------------------------------------------------------------------- > > To REMOVE yourself from this mailing list, send an > E-Mail message > > to: [EMAIL PROTECTED] (note EXACT spelling of > 'ListGuru') and in > > the message BODY, include a line containing: UNSUB > ORACLE-L > > (or the name of mailing list you want to be > removed from). You may > > also send the HELP command for other information > (like subscribing). > > > -- > Please see the official ORACLE-L FAQ: > http://www.orafaq.net > -- > Author: John Kanagaraj > INET: [EMAIL PROTECTED] > > Fat City Network Services -- 858-538-5051 > http://www.fatcity.com > San Diego, California -- Mailing list and web > hosting services > --------------------------------------------------------------------- > To REMOVE yourself from this mailing list, send an > E-Mail message > to: [EMAIL PROTECTED] (note EXACT spelling of > 'ListGuru') and in > the message BODY, include a line containing: UNSUB > ORACLE-L > (or the name of mailing list you want to be removed > from). You may > also send the HELP command for other information > (like subscribing). ______________________________________________________________________ Post your free ad now! http://personals.yahoo.ca -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Boris Dali INET: [EMAIL PROTECTED] Fat City Network Services -- 858-538-5051 http://www.fatcity.com San Diego, California -- Mailing list and web hosting services --------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: [EMAIL PROTECTED] (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).
