Rick, I haven't tried this myself but you could consider a reverse key index (depending on your version).
That way multiple inserts won't go to the same block. However, (from Perf Tuning 101) you will incur much more IO than a normal index if you do range scans, so you'd need to consider how your index is accessed (probably not doing range scans on a primary key sequence). Obviously this will need testing to see how well it goes for you. HTH, Bruce Reardon -----Original Message----- Sent: Tuesday, 23 September 2003 1:45 PM Does anyone have any idea how to improve performance for multiple inserts into a table that uses a sequence generated primary key? I have approximately 6 concurrent inserts per second into this table which causes the primary key index to become a hot block. This in turn causes "buffer busy waits". I have increased initrans, but am not sure where to go from here Any ideas would be appreciated, Thanks, Rick Stephenson Oracle Database Administrator Ovid Technologies, Inc. [EMAIL PROTECTED] -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Reardon, Bruce (CALBBAY) 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).
