Try removing optimal setting, and shrinking RBS to the min extents (or even below) before running your tests.
- Kirti --- Garry Gillies <[EMAIL PROTECTED]> wrote: > From memory (of a course attended looong ago), > Oracle recommends one rollback segment for every > three to four users. > Four rollback segments between thirty six processes > does seem a little mean. > > Garry > > > > > > <[EMAIL PROTECTED]> > Sent by: [EMAIL PROTECTED] > 04/06/03 13:59 > Please respond to ORACLE-L > > > To: Multiple recipients of list ORACLE-L <[EMAIL PROTECTED]> > cc: > Subject: Snapshot too old during stress test... how to avoid > > > Im testing worst case scenarios right now. So Im doing batch > updates,inserts,deletes and 'create table as' from a staging tablespace of > approximately 5GBs to a master tablespace of approximately 11GBs. > > Ive got my job queue processes set to 36 and Im running 36 at a time in > the background in order to gather statistics and timing under worst case > scenarios. > > Im in 8.1.7.3 and I have increased the size of my RBS tablespace to 11GB > for this test. I have 4 standard RBS with optimal size set to 1GB. Why > would I get a snapshot too old? I would think that 11GBs of rollback would > be big enough. Would increasing the number of Rollback segments avoid this > even though I have the same amount of space in the tablespace? > > In reality Im going to seriallize the process to avoid this and to improve > performance, however, I want to stress the system. > > any advice? > > -- > Please see the official ORACLE-L FAQ: http://www.orafaq.net > -- > Author: <[EMAIL PROTECTED] > INET: [EMAIL PROTECTED] > __________________________________ Do you Yahoo!? Yahoo! Calendar - Free online calendar with sync to Outlook(TM). http://calendar.yahoo.com -- Please see the official ORACLE-L FAQ: http://www.orafaq.net -- Author: Kirtikumar Deshpande 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).
