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From "Robert Taylor" <>
Subject [OT] RE: Garbage Collection
Date Sat, 20 Sep 2003 10:53:55 GMT
Where is this paper? Can you provide a link?

A problem similar to this was discussed
earlier this week.

Since you do not make it clear that you are
using Struts or even a web application, please prepend your
posts with [OT] next time.


> -----Original Message-----
> From: Au-Yeung, Stella H []
> Sent: Friday, September 19, 2003 4:58 PM
> To: 'Struts Users Mailing List'
> Subject: Garbage Collection
> A few question on Garbage Collection.  I read the paper on "Tuning Garbage
> Collection".  Can someone tell me:
> 1) What's the default size of 'Permanent Generation'.
> 2) How to print out the available memory in 'Permanent Gereration'?  My
> 'OutOfMemoryError' may be due to this space is fulled.
> 3) The paper talkes about 'Promptness' (which is the time between when an
> object becomes dead and when the memory becomes available).  Is there a
> default of this time.  Can I print out what's the setting is.   I also
> suspend that my 'OutOfMemoryError' is due to memory from dead
> objecs are not
> released soon enough.
> 4) If I use 'NewRatio' to set the ratio between young and old generation,
> why do I need  'NewSize' and 'MaxNewSize'  since the latter too
> are to bound
> the young generation size.  Doesn't that 'NewRatio' already
> setting the size
> of the young generation with respect to the old generation and the total
> heap size?
> Any help will be appreciated.
> Stella
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