G1GC, Java8u40ea, Metaspace questions

[Wolfgang Pedot]

Hi,

after all my questions/tests I just wanted to share what happened when I 
finally switched a production system from 7u60 to 8u40:
The system has 13.6GB Heap, ~4.5GB usage after mixed collects during the 
day, target pause-time is 250ms but most collects take 100-160ms.

It has been two weeks now (unfortunately not continuous uptime due to 
bugfixes) and I can really see the improvements made to G1.
Recorded GC-Time has been reduced by at least 40% and I have not had a 
single Full-GC during the day yet (I still trigger a manual Full-GC in 
the night so I can see where collection-usage is going).
Metaspace-usage is coninuously lower than PermGen was before because it 
is usually kept in check by the 5-6 mixed collects I see during a normal 
day.
So far its been quite a success, thanks for all your input!

regards
Wolfgang Pedot