Hmm...then I'd say it's not really there, and something didn't get cleaned up correctly when the background process either exited or died..... -- Mark J. Bobak Senior Oracle Architect ProQuest Information & Learning There is nothing so useless as doing efficiently that which shouldn't be done at all. -Peter F. Drucker, 1909-2005 -----Original Message----- From: Allen, Brandon [mailto:Brandon.Allen@xxxxxxxxxxx] Sent: Tuesday, January 09, 2007 6:58 PM To: Bobak, Mark; Andrey.Kriushin@xxxxxxxx; oracle-l Subject: RE: Rollback waiting on 'cache buffer chains' latch Yes, looking at spid: SQL> select b.spid from v$session a, v$process b where a.paddr=b.addr and a.sid=664; SPID ------------ 9859284 -----Original Message----- From: Bobak, Mark [mailto:Mark.Bobak@xxxxxxxxxxxxxxx] Are you looking at V$PROCESS.PID or V$PROCESS.SPID? -----Original Message----- From: Allen, Brandon [mailto:Brandon.Allen@xxxxxxxxxxx] But the PID doesn't even exist according to the OS: gbtbaan01.baan4 /baan4/admin/udump ->ps -ef|grep 9859284 oracle 7315490 7422166 0 15:51:24 pts/192 0:00 grep 9859284 Privileged/Confidential Information may be contained in this message or attachments hereto. Please advise immediately if you or your employer do not consent to Internet email for messages of this kind. Opinions, conclusions and other information in this message that do not relate to the official business of this company shall be understood as neither given nor endorsed by it. -- //www.freelists.org/webpage/oracle-l