|Re: Eden v Old [message #10295 is a reply to message #10229]
||Tue, 05 May 2009 19:56
| Andreas Buchen
Registered: July 2009
sorry, bad news, the heap dump neither contains the info about the space
the object is in (also not if the String is in perm) nor an object copy
count. With a heap dump only you will have problems to figure this out.
Maybe take a look at the number of weak and soft references. Many of those
references increase the stop-the-world time, because the VM has to decide
at one point or another whether to mark the objects "behind" the refrence
or not. From what I understand, this has to be done in sync with all gc
In the OQL pane, you could run "SELECT * FROM INSTANCEOF
java.lang.Reference" to see all those references currently in the heap.
Also the "Java Basics" -> Reference statistics queries can give you an
overview of what those references currently keep alive.
The other point to look into are finalizers. As you probably, finalizers
always require 2 full gc to actually free up the space. Again, the "Java
Basics" category also contains a query which displays finalizers and
what's in the queue.
Hopefully I could give you some hints,
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