Wait, you have a 22G shared pool? what kind of database is it? how long does the parsing of new sqls take? I've seen significant performance degradation with a 2G shared pool out of a 10G SGA. Buffer cache rates were affected as well, of course, but not nearly as much as the library cache waits per execute. hth Alan.- On Sun, Jun 2, 2013 at 2:21 PM, <Christopher.Taylor2@xxxxxxxxxxxx> wrote: > Env: 10.2.0.4 3-node RAC. > I've been reading a bit online about library cache lock waits and ran > across a forum reply by Charles Hooper in discussion about > session_cached_cursors and libary cache locks and it was discussed that > perhaps the shared pool was oversized. > > I'm curious what symptoms/indicators (besides library cache lock waits) I > can look into to determine if our shared pool (~22GB) is oversized and/or > increase session cached cursors (20 currently)? The app is very immature > and a mix of SQLs using binds and literals. > > > Chris Taylor > Oracle DBA > Parallon IT&S > > > -- > //www.freelists.org/webpage/oracle-l > > > -- //www.freelists.org/webpage/oracle-l