Hi All,

 

Throughput Garbage collection on a 5.5.15 Tomcat instance is failing to
release Old Gen heap space when it becomes full on one of our Windows
installations.

 

For the most part GC does release memory - in a typical working day this is
an upward trend in terms of the amount of heap reclaimed, gradually becoming
a downward trend late in the day.

 

Every now and then JConsole shows Old Gen as having flat-lined.  Only a
Tomcat restart can rectify the problem.  Killing sessions followed by a
manual GC does not seem to have an effect.

 

Haven't yet determined whether we need to start looking at the young to old
heap allocation ratios - is this the main area I should be looking into?

 

Any thoughts would be appreciated.

 

Cheers,

Darren Kukulka





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