RFR(S): 8010738: G1: Output for full GCs with +PrintGCDetails should contain perm gen size/meta data change info

[Jon Masamitsu]

On 5/13/13 5:40 PM, Srinivas Ramakrishna wrote:
> Hi John --
>
> On Mon, May 6, 2013 at 3:23 PM, John Cuthbertson
> <john.cuthbertson at oracle.com> wrote:
>
>>> 4.896: [Full GC (Allocation Failure) 512M->343M(512M), 4.3640117 secs]
>>>     [Eden: 0.0B(25.0M)->0.0B(97.0M) Survivors: 0.0B->0.0B Heap:
>>> 512.0M(512.0M)->343.3M(512.0M)], [Metaspace: 1611K->2433K(6448K)]
>>>   [Times: user=5.13 sys=0.15, real=4.36 secs]
>>
>> The information that gets printed mirrors that of the other collectors.
>> Here's parallel GC:
>>
>>> 33.245: [Full GC (Ergonomics) [PSYoungGen: 133632K->3423K(144640K)]
>>> [ParOldGen: 348158K->348158K(348160K)] 481790K->351581K(492800K),
>>> [Metaspace: 1612K->2433K(6448K)], 2.5788089 secs] [Times: user=9.96
>>> sys=0.00, real=2.58 secs]
>>
>> The information that's printed is the amount of metaspace used before the
>> GC, the capacity, and the amount of reserved space.
>>
> Do you know why the "used after" for the metadataspace increased after
> the full gc?
> Is that normal, common, rare or abnormal ? :-)

I think that is a bug.  The "capacity" should be "used" after GC .

CR is 8014546.

Thanks.

Jon

Jon

>
> thanks John!
> -- ramki