From jira-user, something to investigate after 3.0 is out:

On Fri, Sep 17, 2004 at 04:22:21PM +0200, Arne Schirmacher wrote:
> I noticed that the Tomcat open session counter goes way up when I am
> using the Eclipse JIRA plugin. Each XML-RPC action seems to use a new
> session. In particular the plugin initialization is expensive (about 25
> new sessions) because there are many XML-RPCs for products, versions etc.
>
> Is it possible to use only one session for the plugin somehow?