G1gc compaction algorithm

[Yu Zhang]

Martin,

Thanks for the logs.
With 4m regions size, after marking, there are 252 HUMS and 80 HUMC regions.
With 4m regions size, after marking, there are 1HUMS and 0 HUMC regions.

The larger region size reduced Humongous allocation greatly.  The mixed 
gc can not clean much due to predicted time too high.  I think we need 
to reduce other pause time first: UpdateRS, ScanRS, Other...

I will get back to you after taking a closer look.

Thanks,
Jenny

On 7/28/2014 8:27 PM, Martin Makundi wrote:
> Hi!
>
> We suffered a couple of Full GC's using regionsize 5M (it seems to be 
> exact looking at logged actual parameters) and we tried the 16M option 
> and this resulted in more severe Full GC behavior.
>
> Here is the promised log for 16 M setting: 
> http://81.22.250.165/log/gc-16m.log
>
> We switch back to 5M hoping it will behave more nicely.
>
> **
> Martin