thanks. We have streams configured in the database from which this database (REPTTEST) was cloned, but: 1) streams is *not* in use in this database 2) we do not configure streams for this table (FGBTRND) On Fri, Oct 21, 2011 at 10:38, Tanel Poder <tanel@xxxxxxxxxxxxxx> wrote: > V$LOCK_TYPE says this about SI enqueues: > > SQL> @lt si > Show lock type info from V$LOCK_TYPE for lock si > > TYPE LOCK NAME ID1 MEANING ID2 MEANING > LT_ DESCRIPTION > ---- ------------------------------ ------------------------- > ------------------------- --- > ------------------------------------------------------------ > SI Streams Table Instantiation object # 0 > NO Prevents muiltiple streams table instantiations > > So, do you have streams in use? > > -- > Tanel Poder > Expert Oracle Exadata book: > http://www.apress.com/9781430233923 > > > > On Fri, Oct 21, 2011 at 4:39 PM, Charles Schultz <sacrophyte@xxxxxxxxx>wrote: > >> Good day, listers, >> I have two questions wrapped up in one issue. :) >> 1) What exactly is "enq: SI - contention" - it does not appear to be >> documented, and not many relevant hits on google >> 2) Why would a subpartition compress operation block simultaneous compress >> operations in different subpartitions or partitions? >> >> -- Charles Schultz -- //www.freelists.org/webpage/oracle-l