Hi, Yong Huang schrieb: > Execution in shared server is even faster than dedicated? Not the other way > around? No, shared is faster, dedicated is factors of 10 slower. Other way round I wouldn't have messed around, nobody wants to execute this statements in shared server mode - we found out about shared mode "by accident" when we tried this from our web server and it was faster there. > What're the major wait events for the session in both cases? 90% of the time: CPU. In shared mode for seconds, in dedicated mode for hours. ADDM via Grid Control didn't find anything smelly. Any ideas out of that? I am stumped at the moment :( Thanks Martin -- Usn's IT Blog for Linux, Oracle, Asterisk www.usn-it.de -- //www.freelists.org/webpage/oracle-l