Paul,
I checked both jdk8 and current jdk9. The heap is only shrinked after
full gc.
After full gc, there is a way to calculate maximum_desired_capacity
(based on used heap after full gc and historic data). If the committed
heap is bigger than the maximum_desired_capacity, then the heap shrinks.
If you -XX:+PrintAdaptiveSizePolicy, you should see messages in the gc
log when shrinking happens.
"Attempt heap shrinking..."
Thanks,
Jenny
On 4/11/2016 11:24 AM, Paul Richards wrote:
I try to track the latest stable release from Oracle. Currently we're
using Java SE 8u77.
I will likely migrate to Java 9 when it is officially released, so it
would be interesting to know if your answer is different for Java 9.
On 11 April 2016 at 18:20, Yu Zhang <yu.zh...@oracle.com> wrote:
Paul,
Which jdk version are you using?
Thanks,
Jenny
On 4/6/2016 6:13 AM, Paul Richards wrote:
Hi there,
Under what circumstances will G1 decide to shrink the heap? I'm
hoping someone can point me to existing docs for this.
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