For incrementing sequence number, Oracle has to use an SQ enqueue latch. To minimize the need for this latch, you can increase the cache size for the Sequences. Additionally, you can also consider KEEPing the Sequence number in Shared pool using dbms_shared_pool.keep() package procedure.
- Kirti -----Original Message----- Sent: Monday, September 23, 2002 12:44 PM To: Multiple recipients of list ORACLE-L Hello List, I have a need to try an replicate a problem that has occured on our production environment. It seems that occassionally our response time dives to the buttom of the barrel in regards to our tuxedo application. When this occurs we have found that many of the blocked sessions are trying to query a sequence. select my.sequence_list.next_value from dual Does anyone know a possible cause for a sequence to be locked? Does anyone know how to lock a sequence? Thanks ahead of time. Tim Boles DBA Lockheed Martin Information Systems -- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: 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.com -- Author: Deshpande, Kirti 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).
