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).
