[#INFRAUTILS-66] Threadswatcher causing safepoint pauses due to calling FindDeadlocks every 500ms

// code vmop [threads: total initially_running wait_to_block] [time: spin block sync cleanup vmop] page_trap_count 2653.486: FindDeadlocks [ 870 1 1 ] [ 1 0 2 1 0 ] 1 vmop [threads: total initially_running wait_to_block] [time: spin block sync cleanup vmop] page_trap_count 2653.986: FindDeadlocks [ 870 0 0 ] [ 0 0 0 1 0 ] 0 vmop [threads: total initially_running wait_to_block] [time: spin block sync cleanup vmop] page_trap_count 2654.486: FindDeadlocks [ 870 0 3 ] [ 0 0 0 1 0 ] 0 vmop [threads: total initially_running wait_to_block] [time: spin block sync cleanup vmop] page_trap_count 2654.986: FindDeadlocks [ 870 0 2 ] [ 0 0 0 1 0 ] 0 vmop [threads: total initially_running wait_to_block] [time: spin block sync cleanup vmop] page_trap_count 2655.486: FindDeadlocks [ 871 0 1 ] [ 0 0 0 1 0 ] 0 vmop [threads: total initially_running wait_to_block] [time: spin block sync cleanup vmop] page_trap_count 2655.986: FindDeadlocks [ 871 0 0 ] [ 0 0 0 1 0 ] 0 vmop [threads: total initially_running wait_to_block] [time: spin block sync cleanup vmop] page_trap_count 2656.486: FindDeadlocks [ 870 0 0 ] [ 0 0 0 1 0 ] 0

2019-11-15T15:43:36.928+0000: 3304.685: Total time for which application threads were stopped: 9.2916061 seconds, Stopping threads took: 0.0001933 seconds
2019-11-15T15:44:47.185+0000: 3374.942: Total time for which application threads were stopped: 9.5493942 seconds, Stopping threads took: 0.0001182 seconds
2019-11-15T15:46:00.042+0000: 3447.800: Total time for which application threads were stopped: 12.4064250 seconds, Stopping threads took: 0.0001305 seconds
2019-11-15T15:47:06.771+0000: 3514.528: Total time for which application threads were stopped: 6.1348460 seconds, Stopping threads took: 0.0005121 seconds
2019-11-15T15:48:12.704+0000: 3580.462: Total time for which application threads were stopped: 5.5681979 seconds, Stopping threads took: 0.0002656 seconds
2019-11-15T15:49:20.000+0000: 3647.758: Total time for which application threads were stopped: 6.8645785 seconds, Stopping threads took: 0.0001139 seconds
2019-11-15T15:50:22.866+0000: 3710.623: Total time for which application threads were stopped: 2.6894180 seconds, Stopping threads took: 0.0002664 seconds
2019-11-15T15:51:29.921+0000: 3777.678: Total time for which application threads were stopped: 6.7841151 seconds, Stopping threads took: 0.0001327 seconds
2019-11-15T15:52:35.962+0000: 3843.719: Total time for which application threads were stopped: 5.8258694 seconds, Stopping threads took: 0.0001516 seconds
2019-11-15T15:53:54.924+0000: 3922.681: Total time for which application threads were stopped: 4.7865003 seconds, Stopping threads took: 0.0002752 seconds
2019-11-15T15:55:13.234+0000: 4000.992: Total time for which application threads were stopped: 3.0976428 seconds, Stopping threads took: 0.0002604 seconds
2019-11-15T15:57:38.405+0000: 4146.162: Total time for which application threads were stopped: 4.2689397 seconds, Stopping threads took: 0.0001862 seconds
2019-11-15T15:58:45.222+0000: 4212.980: Total time for which application threads were stopped: 6.5856216 seconds, Stopping threads took: 0.0014271 seconds

i.e. every 60 seconds we force a stop-the-world for 3-12 seconds. I think this facility should be turned off by default.

[INFRAUTILS-66] Threadswatcher causing safepoint pauses due to calling FindDeadlocks every 500ms Created: 25/Nov/19 Updated: 29/Nov/19 Resolved: 29/Nov/19
Status:	Resolved
Project:	infrautils
Component/s:	metrics
Affects Version/s:	Oxygen-SR4, Neon, Sodium, Magnesium
Fix Version/s:	Magnesium, Sodium SR2, Neon SR3

[INFRAUTILS-66] Threadswatcher causing safepoint pauses due to calling FindDeadlocks every 500ms Created: 25/Nov/19 Updated: 29/Nov/19 Resolved: 29/Nov/19