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From "Robinson, Eric" <>
Subject RE: Setting the Right Amount of Memory
Date Mon, 21 Jun 2010 03:52:15 GMT
>> For what it's worth, either this is not the case in our 
>> real-world situation or the effect is negligible.

> Not surprising - you'd have to be very unlucky to be right 
> at the edge and see a lot of GC activity and be able to 
> continue running.  Usually you'll be over the edge a bit, 
> encounter OOMEs, increase the heap significantly, and be 
> well away from the frequent tight heap scenario. 

What qualifies as a tight heap and what qualifies as a significant
increase? Usually when we see OOMEs we increase the allocation by 32MB
and they go away. 

To return to the original question, is it generally better to custom-fit
the RAM allocation (as we currently do) or to unilaterally set all
instances to a higher amount that we know will not generate OOMEs, such
as 512MB?

Eric Robinson

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