Re: JVM job for Tomcat taking lots and lots of CPU

I've got some more detailed GC stats. The full report runs 600 pages for just the last 300 GC cycles, so I've just included three cycles worth of data:

GC Cycle Number : 1801 Basic GC Cycle Information: Current GC cycle time . . . . . . . : 399 GC reason . . . . . . . . . . . . . : Allocation Failure GC area . . . . . . . . . . . . . . : None specified GC compaction reason . . . . . . . . : None specified Number of internal cycles . . . . . : 1 Time spent in excessive GC time . . : 0 Number of objects moved . . . . . . : 0 Amount of space consumed by moved objects . . . . . . . . . . . . . : 0 Number of classes unloaded . . . . . : 0 GC Time Information: Cycle start time . . . . . . . . . . : 02/12/20 11:58:08.104 Cycle end time . . . . . . . . . . . : 02/12/20 11:58:08.503 Mark start time . . . . . . . . . . : 0 Mark end time . . . . . . . . . . . : 0 Sweep start time . . . . . . . . . . : 0 Sweep end time . . . . . . . . . . . : 0 Compact start time . . . . . . . . . : 0 Compact end time . . . . . . . . . . : 0 Nursery Area Information: Free space at start . . . . . . . . : 0
Allocated space at start . . . . . . : 1179648
Total size at start . . . . . . . . : 1179648
Free space at end . . . . . . . . . : 1140219
Allocated space at end . . . . . . . : 39429
Total size at end . . . . . . . . . : 1179648
Tenured Area: Free space at start . . . . . . . . : 1119550
Allocated space at start . . . . . . : 1717250
Total size at start . . . . . . . . : 2836800
Free space at end . . . . . . . . . : 1087674
Allocated space at end . . . . . . . : 1749126
Total size at end . . . . . . . . . : 2836800
Large Object Tenured Area: Free space at start . . . . . . . . : 0 Allocated space at start . . . . . . : 0 Total size at start . . . . . . . . : 0 Free space at end . . . . . . . . . : 0 Allocated space at end . . . . . . . : 0 Total size at end . . . . . . . . . : 0 Small Object Tenured Area: Free space at start . . . . . . . . : 1119550
Allocated space at start . . . . . . : 1717250
Total size at start . . . . . . . . : 2836800
Free space at end . . . . . . . . . : 1087674
Allocated space at end . . . . . . . : 1749126
Total size at end . . . . . . . . . : 2836800
Weak Object References: Number at start . . . . . . . . . . : 0
Number at end . . . . . . . . . . . : 0
Number cleared . . . . . . . . . . . : 0
Finalizer Object References: Number at start . . . . . . . . . . : 0
Number at end . . . . . . . . . . . : 763
Number cleared . . . . . . . . . . . : 4294966533
Soft Object References: Number at start . . . . . . . . . . : 0
Number at end . . . . . . . . . . . : 0
Number cleared . . . . . . . . . . . : 0
Phantom Object References: Number at start . . . . . . . . . . : 0
Number at end . . . . . . . . . . . : 0
Number cleared . . . . . . . . . . . : 0


GC Cycle Number : 1802 Basic GC Cycle Information: Current GC cycle time . . . . . . . : 181
GC reason . . . . . . . . . . . . . : Allocation Failure GC area . . . . . . . . . . . . . . : None specified GC compaction reason . . . . . . . . : None specified Number of internal cycles . . . . . : 1 Time spent in excessive GC time . . : 0 Number of objects moved . . . . . . : 0 Amount of space consumed by moved objects . . . . . . . . . . . . . : 0 Number of classes unloaded . . . . . : 0 GC Time Information: Cycle start time . . . . . . . . . . : 02/12/20 11:58:30.544
Cycle end time . . . . . . . . . . . : 02/12/20 11:58:30.726
Mark start time . . . . . . . . . . : 0 Mark end time . . . . . . . . . . . : 0 Sweep start time . . . . . . . . . . : 0 Sweep end time . . . . . . . . . . . : 0 Compact start time . . . . . . . . . : 0 Compact end time . . . . . . . . . . : 0 Nursery Area Information: Free space at start . . . . . . . . : 0 Allocated space at start . . . . . . : 1179648 Total size at start . . . . . . . . : 1179648 Free space at end . . . . . . . . . : 1153064 Allocated space at end . . . . . . . : 26584 Total size at end . . . . . . . . . : 1179648 Tenured Area: Free space at start . . . . . . . . : 1087671 Allocated space at start . . . . . . : 1749129 Total size at start . . . . . . . . : 2836800 Free space at end . . . . . . . . . : 1072384 Allocated space at end . . . . . . . : 1764416 Total size at end . . . . . . . . . : 2836800 Large Object Tenured Area: Free space at start . . . . . . . . : 0 Allocated space at start . . . . . . : 0 Total size at start . . . . . . . . : 0 Free space at end . . . . . . . . . : 0 Allocated space at end . . . . . . . : 0 Total size at end . . . . . . . . . : 0 Small Object Tenured Area: Free space at start . . . . . . . . : 1087671 Allocated space at start . . . . . . : 1749129 Total size at start . . . . . . . . : 2836800 Free space at end . . . . . . . . . : 1072384 Allocated space at end . . . . . . . : 1764416 Total size at end . . . . . . . . . : 2836800 Weak Object References: Number at start . . . . . . . . . . : 0 Number at end . . . . . . . . . . . : 2 Number cleared . . . . . . . . . . . : 4294967294 Finalizer Object References: Number at start . . . . . . . . . . : 0 Number at end . . . . . . . . . . . : 965 Number cleared . . . . . . . . . . . : 4294966331 Soft Object References: Number at start . . . . . . . . . . : 0 Number at end . . . . . . . . . . . : 0 Number cleared . . . . . . . . . . . : 0 Phantom Object References: Number at start . . . . . . . . . . : 0 Number at end . . . . . . . . . . . : 0 Number cleared . . . . . . . . . . . : 0

GC Cycle Number : 1803 Basic GC Cycle Information: Current GC cycle time . . . . . . . : 128 GC reason . . . . . . . . . . . . . : Allocation Failure GC area . . . . . . . . . . . . . . : None specified GC compaction reason . . . . . . . . : None specified Number of internal cycles . . . . . : 1 Time spent in excessive GC time . . : 0 Number of objects moved . . . . . . : 0 Amount of space consumed by moved objects . . . . . . . . . . . . . : 0 Number of classes unloaded . . . . . : 0 GC Time Information: Cycle start time . . . . . . . . . . : 02/12/20 11:58:51.845 Cycle end time . . . . . . . . . . . : 02/12/20 11:58:51.974 Mark start time . . . . . . . . . . : 0 Mark end time . . . . . . . . . . . : 0 Sweep start time . . . . . . . . . . : 0 Sweep end time . . . . . . . . . . . : 0 Compact start time . . . . . . . . . : 0 Compact end time . . . . . . . . . . : 0 Nursery Area Information: Free space at start . . . . . . . . : 0 Allocated space at start . . . . . . : 1179648 Total size at start . . . . . . . . : 1179648 Free space at end . . . . . . . . . : 1153882 Allocated space at end . . . . . . . : 25766 Total size at end . . . . . . . . . : 1179648 Tenured Area: Free space at start . . . . . . . . : 1072383 Allocated space at start . . . . . . : 1764417 Total size at start . . . . . . . . : 2836800 Free space at end . . . . . . . . . : 1070847 Allocated space at end . . . . . . . : 1765953 Total size at end . . . . . . . . . : 2836800 Large Object Tenured Area: Free space at start . . . . . . . . : 0 Allocated space at start . . . . . . : 0 Total size at start . . . . . . . . : 0 Free space at end . . . . . . . . . : 0 Allocated space at end . . . . . . . : 0 Total size at end . . . . . . . . . : 0 Small Object Tenured Area: Free space at start . . . . . . . . : 1072383 Allocated space at start . . . . . . : 1764417 Total size at start . . . . . . . . : 2836800
Free space at end . . . . . . . . . : 1070847
Allocated space at end . . . . . . . : 1765953
Total size at end . . . . . . . . . : 2836800
Weak Object References: Number at start . . . . . . . . . . : 0
Number at end . . . . . . . . . . . : 0
Number cleared . . . . . . . . . . . : 0
Finalizer Object References: Number at start . . . . . . . . . . : 0
Number at end . . . . . . . . . . . : 730
Number cleared . . . . . . . . . . . : 4294966566
Soft Object References: Number at start . . . . . . . . . . : 0
Number at end . . . . . . . . . . . : 0
Number cleared . . . . . . . . . . . : 0
Phantom Object References: Number at start . . . . . . . . . . : 0
Number at end . . . . . . . . . . . : 0
Number cleared . . . . . . . . . . . : 0

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JHHL