Hi I did have default 20 and incresed it to 2000. The select nextval dropped considerable to almost nothing. The inserts now take 98% of the load and the gc buffer busy is 82% of this. The throughput increased marginally by this. On Fri, 2006-04-21 at 18:09 +0300, Gints Plivna wrote: > How much value you have for sequence cache? > Rather often default 20 is too low. Try at least thousands. > > Gints -- //www.freelists.org/webpage/oracle-l