try netbeans its free and the profiler will watch all your objects being created. it will also work with snapshots...
On Thu, 2008-03-13 at 20:56 +0200, Juha Laiho wrote: > Scott McClanahan wrote: > > > On Thu, 2008-03-13 at 12:02 -0400, Christopher Schultz wrote: > > > Caldarale, Charles R wrote: > > |> From: Scott McClanahan [mailto:[EMAIL PROTECTED] > > |> Subject: Re: Database connections grow after redeploy > > > | As far as the continuing data base connections, I can only speculate > > | that the prior instances of the webapp are still active, thereby > > | preventing cleanup of their resources. > > > > I agree. Scott: are you able to run your application through a tool that > > > allows you to observe the heap and object graphs? > > > > More likely is that one or more application-level objects has retained a > > > reference to a specific Connection object, which, of course, retains > > > references back to the connection pool that created it. I would check > > > any ServletContextListener classes you have, and then a generic search > > > for putting things into the ServletContext, since that is one of the > > > only places that applications typically store long-lived objects. > > > Do you have any suggestions for a profiling tool like you described? > > Preferably open source. Thanks. > > Don't know about open source products, but I can vouch for YourKit Java > Profiler. As far as I know, the main difference between YourKit and other > profilers is that YourKit allows you to work through snapshots, whereas > other profilers inject their probes into Java object creation methods. > This means that more or less the only moment when YourKit has an effect > on the performance of your application is when you take a memory snapshot. > The other profilers I've seen attempt to trace each object allocation and > deallocation in real time, which can be rather CPU consuming (especially > if you're tracing a problem you cannot replicate in test environments). > With YourKit, you take snapshots of the Java VM memory of your application, > and compare them "off-line" (i.e. without needing any connection to the > live application). --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
