Strage jmap heap output for G1 on 32bit JVM
jk at codearte.io
Wed May 20 13:23:49 UTC 2015
64 bit Linux with 32bit JVM.
20 maj 2015 15:18 "Jesper Wilhelmsson" <jesper.wilhelmsson at oracle.com>
> Does this reproduce every time?
> What platform is it?
> I have tried to reproduce this on 32bit linux but can't see anything weird
> there. It seems likely that there is a variable with the wrong type
> somewhere on the way. I'll see if I can find something.
> Jakub Kubryński skrev den 15/5/15 17:22:
>> I've just checked that on 32bit JVM (HotSpot 8u45) jmap reports strange
>> information for G1 collector. As you can see Xmx is set to 2G (which fits
>> MaxHeapSize) but regions count (almost 15k) and capacity is incorrect.
>> Any ideas
>> Heap Configuration:
>> MinHeapFreeRatio = 40
>> MaxHeapFreeRatio = 70
>> MaxHeapSize = 2147483648 (2048.0MB)
>> NewSize = 1048576 (1.0MB)
>> MaxNewSize = 428867584 (409.0MB)
>> OldSize = 4194304 (4.0MB)
>> NewRatio = 2
>> SurvivorRatio = 8
>> MetaspaceSize = 16777216 (16.0MB)
>> CompressedClassSpaceSize = 1073741824 (1024.0MB)
>> MaxMetaspaceSize = 4294963200 (4095.99609375MB)
>> G1HeapRegionSize = 1048576 (1.0MB)
>> Heap Usage:
>> G1 Heap:
>> regions = 14336
>> capacity = 15032385536 (14336.0MB)
>> used = 76347888 (72.81101989746094MB)
>> free = 14956037648 (14263.188980102539MB)
>> 0.5078893687043872% used
>> Best regards,
>> Jakub Kubrynski
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