On 5/14/2018 11:41 AM, Thomas Schatzl wrote: > However not only gc overhead is accounted for in the decision to give > an OOME, but also how much memory the full gcs free. > > Probably the most important flag here would be GCHeapFreeLimit: > simplified, if free space after full gc is below this percentage of > total heap, that full gc does not count against GCOverHeadLimit. > > Looking at the log output, after Full GC there is ~4% of max heap > available. The default value for GCOverHeadLimit is 2 (percent).
I have a question sparked by this discussion, but it's only indirectly related. How long a timeframe is examined to determine whether the 98% and 2% thresholds are violated? This information is not in the documentation that I've been able to find. Here's an example of a java 8 documentation link where that information is not shown: https://docs.oracle.com/javase/8/docs/technotes/guides/vm/gctuning/cms.html#sthref35 Thanks, Shawn _______________________________________________ hotspot-gc-use mailing list hotspot-gc-use@openjdk.java.net http://mail.openjdk.java.net/mailman/listinfo/hotspot-gc-use
