RFR: 8200228: Change default value of HeapSizePerGCThread (original) (raw)

Stefan Johansson stefan.johansson at oracle.com
Wed Mar 28 13:52:42 UTC 2018

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Hi,

Please review this change of the default value for HeapSizePerGCThread.

Links JBS: https://bugs.openjdk.java.net/browse/JDK-8200228 Webrev: http://cr.openjdk.java.net/~sjohanss/8200228/00/

Summary My testing shows that for DaCapo, SpecJVM98 and GCBasher (gc intensive stress test) with small heaps we get better pause times with the flag set to 32M. There might be other arguments, such as not using to much resources on small systems that might also be important so please let me know if you have reasons why the flag should be left unchanged.

Thanks, Stefan

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