1+ week ago, I wrote: > After upgrading to 11.2.0.3 (64-bit AIX 5.3), during index creates with DOP > 2 on our dev DB, EM12c goes nuts in alerting me to blocking locks. It looks > like the issue is in the DB: > > There are several messages in DBA_ALERT_HISTORY with a REASON of "Session > nnn is blocking 0 other sessions". If it's blocking zero sessions, then why > the message? The only thing of consequence happening at the time of these > messages on a Friday night in this dev DB is a slew of CREATE > INDEX...PARALLEL 2 statements running sequentially (one at a time). ASH and > AWR reports seem to confirm this. No one else seeing this? Oracle tells me that this is normal. Yes, I saw the behavior in 10.1 as well, but that version didn't feel the need to wake me up about it... [sigh] I think I preferred my old unsupported bugs rather than the supported ones I have now. Rich -- //www.freelists.org/webpage/oracle-l