Dennis-- The faster machine had 10 database connections, the slower, 50. Not all were used in either case. But my comparison is for inserts done by a single session, i.e., it's not the aggregate insert rate, but a direct comparison of the same insert statement in a single session on each server.
As for the disk layout, I don't have that information readily available (the SA department doesn't like to let the DBA department get involved in such things!). I don't think it's significantly different, though. Thanks, Paul --- DENNIS WILLIAMS <[EMAIL PROTECTED]> wrote: > Paul - How many insert processes did you run on each system? Is the > disk > layout identical in terms of spreading across devices? > Dennis Williams > DBA > Lifetouch, Inc. > [EMAIL PROTECTED] > > > -----Original Message----- > Sent: Wednesday, April 10, 2002 6:43 PM > To: Multiple recipients of list ORACLE-L > > > Greetings! > > I am trying to diagnose a performance difference between two > databases > running the same test. They are similarly configured (same SGA size, > etc.), and the servers are identical except for the number of CPUs > (server A has 4, server B has 6). > > On database A, INSERT performance is about 190 rows/second. > > On database B, INSERT performance is over 500 rows/second. > > I saw some cache buffers chains, buffer busy, and library cache latch > waits on database A while the test was running, as well as redo log > sync waits. The waits didn't seem excessive, though. I checked for > "checkpoint not complete" redo allocation messages in database A's > alert log and found none. The db_block_lru_latches parameter is set > to > one-half the number of CPUs in both machines. > > I'd much appreciate any suggestions as to what else to check. I know > that freelists can be an issue (there are multiple sessions > performing > inserts); how can I check to see if there's freelist contention? > Anything else I should investigate? > > Many TIA, > > > > > > ===== > Paul Baumgartel, Adept Computer Associates, Inc. > [EMAIL PROTECTED] > > > > > > __________________________________________________ > Do You Yahoo!? > Yahoo! Tax Center - online filing with TurboTax > http://taxes.yahoo.com/ > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.com > -- > Author: Paul Baumgartel > INET: [EMAIL PROTECTED] > > Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 > San Diego, California -- Public Internet access / Mailing > Lists > -------------------------------------------------------------------- > 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.com > -- > Author: DENNIS WILLIAMS > INET: [EMAIL PROTECTED] > > Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 > San Diego, California -- Public Internet access / Mailing > Lists > -------------------------------------------------------------------- > 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). __________________________________________________ Do You Yahoo!? Yahoo! Tax Center - online filing with TurboTax http://taxes.yahoo.com/ -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Paul Baumgartel INET: [EMAIL PROTECTED] Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- 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).
