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From "Bernt M. Johnsen" <Bernt.John...@Sun.COM>
Subject Re: [jira] Commented: (DERBY-23) just booting jdbc driver and shutting down seem to leak memory
Date Mon, 19 Sep 2005 19:15:28 GMT
>>>>>>>>>>>> Satheesh Bandaram (JIRA) wrote (2005-09-19
20:06:32):
>     [ http://issues.apache.org/jira/browse/DERBY-23?page=comments#action_12329889 ] 
> 
> Satheesh Bandaram commented on DERBY-23:
> ----------------------------------------
> 
> Good fix. Wonder if adding the explanations in the code, where
> possible, would be more useful than leaving them in Jira entry.

I agree. 
> 
> Bernt expressed interest in commiting the change, so I am not
> commiting this to SVN.

Knut: Add explanations, and then I'll commit.

> 
> > just booting jdbc driver and shutting down seem to leak memory
> > --------------------------------------------------------------
> >
> >          Key: DERBY-23
> >          URL: http://issues.apache.org/jira/browse/DERBY-23
> >      Project: Derby
> >         Type: Bug
> >   Components: Services
> >     Versions: 10.0.2.0
> >     Reporter: Tulika Agrawal
> >     Assignee: Knut Anders Hatlen
> >     Priority: Minor
> >  Attachments: DERBY-23.diff, DERBY-23.stat
> >
> > Reporting for Daniel John Debrunner.
> > Doing simple boot and shutdown of the driver in a loop
> > seem to grow the heap forever:
> > new org.apache.derby.jdbc.EmbeddedDriver(); //boot the driver
> > DriverManager.getConnection("jdbc:derby:;shutdown=true"); 
> > //shutdown the cloudscape instance completely
> > after booting and shutting down 1516 times, memory used is  
> > ~~41931056 bytes.
> > Sample GC Output:
> > 1931.93: [Full GC 43484K->43243K(65088K), 0.1779751 secs]
> > 1933.13: [Full GC 43511K->43270K(65088K), 0.1914383 secs]
> > 1934.47: [Full GC 43538K->43297K(65088K), 0.1808878 secs]
> > 1935.68: [Full GC 43564K->43324K(65088K), 0.4461623 secs]
> > 1937.43: [Full GC 43591K->43350K(65088K), 0.1842980 secs]
> > 1938.63: [Full GC 43617K->43377K(65088K), 0.1873431 secs]
> > 1939.85: [Full GC 43644K->43404K(65088K), 0.1948505 secs]
> > 1941.07: [Full GC 43671K->43430K(65088K), 0.1790895 secs]
> 
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-- 
Bernt Marius Johnsen, Database Technology Group, 
Sun Microsystems, Trondheim, Norway

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