Hi There,
You can invoke the garbage collector by using the System.gc() method.
The memory is never returned to OS but the JVM keeps it in a pool used for
object creation, it would make no sense in releasing this back to the OS as
it will probably need to use it at some point or another.
In more recent JVM's (1.4 onwards) the garbage collector has been threaded
to improve performance and penalties as until then the cost of a collection
was relatively expensive.
For more information read the documentation at www.java.sun.com
Hope this helps
Pete
-----Original Message-----
From: Michael Duffy [mailto:[EMAIL PROTECTED]
Sent: 14 January 2004 14:07
To: Tomcat Users List
Subject: Re: Memory Leaks
My understanding is that the GC runs on a low-priority
thread, so you never get to tell it when to run. The
operating system and JVM deal with it.
I also recall reading that memory is returned to the
JVM, but not released back to the OS. So if you're
watching Memory Usage in the Windows Task Manager and
not seeing it go down, that might explain why. - MOD
--- Christian Witucki <[EMAIL PROTECTED]>
wrote:
> Does anyone know that when Garbage Collection is
> going on how often it should be set to collect and
> if memory is really being returned. I believe that
> the memory is not, but how can I check to determine
> that???
>
> Christian Witucki
> Network Analyst
> 375 Essjay Road
> Williamsville, NY 14221
> 716-631-3001 x3812
>
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