Bugs item #1029606, was opened at 2004-09-16 19:02 Message generated for change (Comment added) made by starksm You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=376685&aid=1029606&group_id=22866
Category: JBossCX Group: v3.2 Status: Open Resolution: None Priority: 5 Submitted By: Elias Ross (genman) Assigned to: Nobody/Anonymous (nobody) Summary: jdbc.WrapperDataSource.getConnection is slow Initial Comment: I've been profiling JMS code. When a JMS message is added to the server, the persistence manager locates an appropriate DataSource. Out of the time spent in org.jboss.mq.Connection.sendToServer, about 28% of the time is getting the database connection through jdbc.WrapperDataSource.getConnection to do its work. This is after the pool has been initialized, etc. (40% is actual persistence, though most of it is the message serialization.) I suspect a lot of the work is calculating a hashCode on the javax.security.auth.Subject. SubjectCriKey and SubjectKey should have this value cached. Ideally, when one is accessing the local DB, none of this auth stuff should have to take place. Looking at the source for Subject.java, the hash code is not kept. BaseConnectionManager2.allocateConnection %CPU=27.949 %Time=27.963 calls=411 Allocations I've seen: JBossManagedConnectionPool$SubjectActions is created 3284 times (for 411 getConnection calls) java.util.Properties (1642 times) (Disclaimer: This was done through JBoss profiler, which may or may not create real numbers. It does look, though, that CX is pretty slow for some operations.) ---------------------------------------------------------------------- Comment By: Scott M Stark (starksm) Date: 2004-12-29 12:52 Message: Logged In: YES user_id=175228 All issues have been moved to http://jira.jboss.com. Existing issues have been moved. New issues will be closed with this canned reponse. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=376685&aid=1029606&group_id=22866 ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://productguide.itmanagersjournal.com/ _______________________________________________ JBoss-Development mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/jboss-development
