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javagarbage-collectiong1gc

Followup: G1 Collector not doing full GC

This is followup question to G1 Collector not doing full GC

Removed -XX:MaxGCPauseMillis=100 -XX:InitiatingHeapOccupancyPercent=80

Default for IHOP is 45%

S0C S1C S0U S1U EC EU OC OU PC PU YGC YGCT FGC FGCT GCT

0 96M 0 96M 3.4G 704M 6.5G 5.5G 640M 451.2M 6739 44.4m 0 0m 44.4m

Old generation is reaching 5.5G in size still full GC is not happening. Any idea why?

Thanks, Sameer

Solution

  • G1 seems to be working as it should. The average pause times of 763 young collections was 163ms, well within the 200ms default pause goal.

    The longest pause was 373ms, of which 279.2ms were spent on reference processing. -XX:+ParallelRefProcEnabled should help here.

    Default for IHOP is 45%

    When none is set that's the initial IHOP, but it gets dynamically adjusted at runtime to meet other GC goals.