ZGC Unable to reclaim memory for long time

Per Liden per.liden at oracle.com
Wed Nov 6 23:08:44 UTC 2019

On 11/6/19 10:04 PM, Sundara Mohan M wrote:
> But on the other hand with ZGC my throughput increased from 
> *(ParallelGC)97%* to*(ZGC)99.7% *and my STW pauses have never crossed 20ms.

Could you please paste the last printout of the "Garbage Collection 
Statistics" table? If you have pauses close to 20ms, it would be 
interesting to see where that time is spent. I would assume it's 
accounted to "Subphase: Pause Roots Threads", but seeing the whole table 
would tell the me more.


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