You can set that heap memory must have been unused before being uncommitted:
-XX:ZUncommitDelay = seconds, where seconds is the desired amount of time in seconds.
To set heap unused time to 3 minutes you can use:
Sets the amount of time (in seconds) that heap memory must have been unused before being uncommitted. By default, this option is set to 300 (5 minutes). Committing and uncommitting memory are relatively expensive operations. Using a lower value will cause heap memory to be uncommitted earlier, at the risk of soon having to commit it again.
Default value is 300 seconds
TODO link MinHeapFreeRatio, MaxHeapFreeRatio, Xmx, Xms, UseSerialGC, USeParNewGC, UseParallelGC, UseZGC
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