MinHeapFreeRatio / MaxHeapFreeRatio

Jon Masamitsu jon.masamitsu at oracle.com
Thu May 10 09:31:34 PDT 2012


Damon,

 From inspection of the code I think that CMS does not do a
resizing of the heap after it does a System.gc().  That resizing
would be the code that adjusts the generations for
MinHeapFreeRatio / MaxHeapFreeRatio and returns
memory to the OS.

I've created CR 7167923 to investigate this bug.

Jon

On 5/9/2012 2:34 AM, Damon Hart-Davis wrote:
> Hi,
>
> No, because when I explicitly call System.gc() I want it to try as hard as it can, even to the point of stopping the world...
>
> Rgds
>
> Damon
>
>
> On 9 May 2012, at 10:27, Jon Masamitsu wrote:
>
>> Damon,
>>
>> Do you turn on ExplicitGCInvokesConcurrent?
>>
>> Jon
>>


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