Pause Mark Start took a long time
kang wangk
wangkang0902 at gmail.com
Wed Jul 13 07:44:39 UTC 2022
Hi,
I am running ZGC in production(Deployed in k8s) with following settings
-Xms4000m -Xmx4000m -XX:ConcGCThreads=2
-XX:-UseDynamicNumberOfGCThreads -XX:+UseZGC -XX:-ZProactive
-XX:ZAllocationSpikeTolerance=3 -XX:ZCollectionInterval=60
Occasionally encounter a long Pause Mark Start time(the longest pause
time is 5s)
Here are some GC logs blow
[2022-07-12T10:52:52.242+0800][10][info][gc,init] Initializing The Z
Garbage Collector
[2022-07-12T10:52:52.242+0800][10][info][gc,init] Version:
17.0.3+8-LTS-111 (release)
[2022-07-12T10:52:52.242+0800][10][info][gc,init] NUMA Support: Disabled
[2022-07-12T10:52:52.242+0800][10][info][gc,init] CPUs: 64 total, 4 available
[2022-07-12T10:52:52.242+0800][10][info][gc,init] Memory: 10240M
[2022-07-12T10:52:52.243+0800][10][info][gc,init] Large Page Support: Disabled
[2022-07-12T10:52:52.243+0800][10][info][gc,init] GC Workers: 2/3 (static)
[2022-07-12T10:52:52.243+0800][10][info][gc,init] Address Space Type:
Contiguous/Unrestricted/Complete
[2022-07-12T10:52:52.243+0800][10][info][gc,init] Address Space Size:
64000M x 3 = 192000M
[2022-07-12T10:52:52.243+0800][10][info][gc,init] Heap Backing File:
/memfd:java_heap
[2022-07-12T10:52:52.243+0800][10][info][gc,init] Heap Backing
Filesystem: tmpfs (0x1021994)
[2022-07-12T10:52:52.243+0800][10][info][gc,init] Min Capacity: 4000M
[2022-07-12T10:52:52.243+0800][10][info][gc,init] Initial Capacity: 4000M
[2022-07-12T10:52:52.243+0800][10][info][gc,init] Max Capacity: 4000M
[2022-07-12T10:52:52.243+0800][10][info][gc,init] Medium Page Size: 32M
[2022-07-12T10:52:52.243+0800][10][info][gc,init] Pre-touch: Enabled
[2022-07-12T10:52:52.243+0800][10][info][gc,init] Available space on
backing filesystem: N/A
[2022-07-12T10:52:52.243+0800][10][info][gc,init] Uncommit: Implicitly
Disabled (-Xms equals -Xmx)
[2022-07-12T10:52:55.014+0800][10][info][gc,init] Runtime Workers: 3
[2022-07-12T10:52:55.014+0800][10][info][gc ] Using The Z Garbage Collector
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] === Garbage
Collection Statistics
=======================================================================================================================
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ]
Last 10s
Last 10m Last 10h Total
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ]
Avg / Max Avg
/ Max Avg / Max Avg / Max
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Collector:
Garbage Collection Cycle 0.000 / 0.000
215.897 / 245.004 199.964 / 281.004 198.501 / 327.779 ms
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Contention:
Mark Segment Reset Contention 0 / 0
0 / 3 0 / 13 0 / 17 ops/s
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Contention:
Mark SeqNum Reset Contention 0 / 0
0 / 2 0 / 3 0 / 4 ops/s
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Critical:
Allocation Stall 0 / 0
0 / 0 0 / 0 0 / 0 ops/s
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Critical:
Allocation Stall 0.000 / 0.000
0.000 / 0.000 0.000 / 0.000 0.000 / 0.000 ms
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Critical: GC
Locker Stall 0 / 0 0
/ 1 0 / 1 0 / 1 ops/s
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Critical: GC
Locker Stall 0.000 / 0.000 0.001
/ 0.001 0.022 / 0.138 0.032 / 0.197 ms
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Critical:
Relocation Stall 0 / 0
0 / 0 0 / 0 0 / 0 ops/s
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Critical:
Relocation Stall 0.000 / 0.000
0.000 / 0.000 0.000 / 0.000 0.000 / 0.000 ms
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Memory:
Allocation Rate 106 / 124
109 / 240 100 / 308 104 / 352 MB/s
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Memory:
Out Of Memory 0 / 0
0 / 0 0 / 0 0 / 0 ops/s
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Memory:
Page Cache Flush 0 / 0
0 / 0 0 / 0 0 / 0 MB/s
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Memory:
Page Cache Hit L1 53 / 62
54 / 76 49 / 94 51 / 176 ops/s
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Memory:
Page Cache Hit L2 0 / 0
0 / 0 0 / 0 0 / 0 ops/s
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Memory:
Page Cache Hit L3 0 / 0
0 / 0 0 / 1 0 / 123 ops/s
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Memory:
Page Cache Miss 0 / 0
0 / 0 0 / 0 0 / 1 ops/s
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Memory:
Uncommit 0 / 0
0 / 0 0 / 0 0 / 0 MB/s
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Memory:
Undo Object Allocation Failed 0 / 0
0 / 94 0 / 189 0 / 438 ops/s
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Memory:
Undo Object Allocation Succeeded 0 / 0
0 / 90 0 / 571 0 / 571 ops/s
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Memory:
Undo Page Allocation 0 / 1
0 / 3 0 / 7 0 / 9 ops/s
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Phase:
Concurrent Mark 0.000 / 0.000
162.242 / 191.178 149.779 / 233.888 149.319 / 253.310 ms
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Phase:
Concurrent Mark Continue 0.000 / 0.000
0.000 / 0.000 0.000 / 0.000 0.000 / 0.000 ms
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Phase:
Concurrent Mark Free 0.000 / 0.000
0.001 / 0.003 0.001 / 0.035 0.001 / 0.035 ms
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Phase:
Concurrent Process Non-Strong References 0.000 / 0.000
40.077 / 43.167 36.932 / 73.540 35.951 / 73.540 ms
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Phase:
Concurrent Relocate 0.000 / 0.000
9.764 / 13.321 9.670 / 18.334 9.656 / 64.541 ms
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Phase:
Concurrent Reset Relocation Set 0.000 / 0.000
0.246 / 0.377 0.234 / 0.385 0.228 / 0.459 ms
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Phase:
Concurrent Select Relocation Set 0.000 / 0.000
2.843 / 3.684 2.670 / 4.496 2.647 / 9.518 ms
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Phase:
Pause Mark End 0.000 / 0.000
0.036 / 0.059 0.030 / 0.080 0.029 / 0.105 ms
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Phase:
Pause Mark Start 0.000 / 0.000
0.040 / 0.050 0.057 / 17.923 0.085 / 116.781 ms
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Phase:
Pause Relocate Start 0.000 / 0.000
0.022 / 0.032 0.021 / 0.060 0.021 / 0.063 ms
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Subphase:
Concurrent Classes Purge 0.000 / 0.000
1.484 / 2.016 1.290 / 2.861 1.230 / 3.239 ms
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Subphase:
Concurrent Classes Unlink 0.000 / 0.000
34.848 / 38.008 32.338 / 68.815 31.461 / 68.815 ms
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Subphase:
Concurrent Mark 0.000 / 0.000
158.162 / 187.147 146.016 / 230.654 145.542 / 250.339 ms
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Subphase:
Concurrent Mark Try Flush 0.000 / 0.000
0.208 / 0.536 0.197 / 79.168 0.179 / 79.168 ms
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Subphase:
Concurrent Mark Try Terminate 0.000 / 0.000
0.468 / 1.076 0.455 / 5.019 0.449 / 32.389 ms
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Subphase:
Concurrent References Enqueue 0.000 / 0.000
0.001 / 0.008 0.002 / 0.015 0.002 / 0.031 ms
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Subphase:
Concurrent References Process 0.000 / 0.000
0.417 / 0.662 0.297 / 0.828 0.305 / 4.058 ms
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Subphase:
Concurrent Roots ClassLoaderDataGraph 0.000 / 0.000
0.421 / 1.062 0.393 / 1.062 0.392 / 1.062 ms
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Subphase:
Concurrent Roots CodeCache 0.000 / 0.000
0.000 / 0.000 0.000 / 0.000 0.000 / 0.000 ms
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Subphase:
Concurrent Roots JavaThreads 0.000 / 0.000
2.863 / 3.649 2.609 / 4.023 2.636 / 4.221 ms
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Subphase:
Concurrent Roots OopStorageSet 0.000 / 0.000
0.101 / 0.148 0.094 / 0.172 0.092 / 0.748 ms
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Subphase:
Concurrent Weak Roots OopStorageSet 0.000 / 0.000
2.895 / 3.442 2.633 / 3.805 2.588 / 4.245 ms
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] Subphase:
Pause Mark Try Complete 0.000 / 0.000
0.000 / 0.000 0.000 / 0.000 0.003 / 0.006 ms
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ] System:
Java Threads 0 / 0
204 / 227 173 / 227 167 / 227 threads
[2022-07-13T14:18:33.036+0800][18][info][gc,stats ]
=========================================================================================================================================================
[2022-07-13T14:18:37.836+0800][16][info][gc,task ] GC(2822) Using 2 workers
[2022-07-13T14:18:38.568+0800][23][info][gc,phases ] GC(2822) Pause
Mark Start 731.329ms
[2022-07-13T14:18:38.568+0800][23][info][safepoint ] Safepoint
"ZMarkStart", Time since last: 33682417078 ns, Reaching safepoint:
78660 ns, At safepoint: 731509582 ns, Total: 731588242 ns
[2022-07-13T14:18:38.763+0800][16][info][gc,phases ] GC(2822)
Concurrent Mark 195.357ms
[2022-07-13T14:18:38.763+0800][23][info][gc,phases ] GC(2822) Pause
Mark End 0.037ms
[2022-07-13T14:18:38.763+0800][23][info][safepoint ] Safepoint
"ZMarkEnd", Time since last: 195457277 ns, Reaching safepoint: 59774
ns, At safepoint: 69617 ns, Total: 129391 ns
[2022-07-13T14:18:38.763+0800][16][info][gc,phases ] GC(2822)
Concurrent Mark Free 0.002ms
[2022-07-13T14:18:38.807+0800][16][info][gc,phases ] GC(2822)
Concurrent Process Non-Strong References 43.503ms
[2022-07-13T14:18:38.807+0800][16][info][gc,phases ] GC(2822)
Concurrent Reset Relocation Set 0.266ms
[2022-07-13T14:18:38.811+0800][16][info][gc,phases ] GC(2822)
Concurrent Select Relocation Set 3.787ms
[2022-07-13T14:18:38.811+0800][23][info][gc,phases ] GC(2822) Pause
Relocate Start 0.022ms
[2022-07-13T14:18:38.811+0800][23][info][safepoint ] Safepoint
"ZRelocateStart", Time since last: 47720139 ns, Reaching safepoint:
71865 ns, At safepoint: 50103 ns, Total: 121968 ns
[2022-07-13T14:18:38.823+0800][16][info][gc,phases ] GC(2822)
Concurrent Relocate 12.090ms
[2022-07-13T14:18:38.823+0800][16][info][gc,load ] GC(2822) Load:
17.47/17.79/16.25
[2022-07-13T14:18:38.823+0800][16][info][gc,mmu ] GC(2822) MMU:
2ms/0.0%, 5ms/0.0%, 10ms/0.0%, 20ms/0.0%, 50ms/0.0%, 100ms/0.0%
[2022-07-13T14:18:38.823+0800][16][info][gc,marking ] GC(2822) Mark:
2 stripe(s), 2 proactive flush(es), 1 terminate flush(es), 0
completion(s), 0 continuation(s)
[2022-07-13T14:18:38.823+0800][16][info][gc,marking ] GC(2822) Mark
Stack Usage: 32M
[2022-07-13T14:18:38.823+0800][16][info][gc,nmethod ] GC(2822)
NMethods: 23051 registered, 1360 unregistered
[2022-07-13T14:18:38.823+0800][16][info][gc,metaspace] GC(2822)
Metaspace: 113M used, 114M committed, 516M reserved
[2022-07-13T14:18:38.823+0800][16][info][gc,ref ] GC(2822) Soft:
1059 encountered, 271 discovered, 0 enqueued
[2022-07-13T14:18:38.823+0800][16][info][gc,ref ] GC(2822) Weak:
16086 encountered, 1352 discovered, 0 enqueued
[2022-07-13T14:18:38.823+0800][16][info][gc,ref ] GC(2822) Final:
30 encountered, 2 discovered, 0 enqueued
[2022-07-13T14:18:38.823+0800][16][info][gc,ref ] GC(2822)
Phantom: 290 encountered, 250 discovered, 1 enqueued
[2022-07-13T14:18:38.823+0800][16][info][gc,reloc ] GC(2822) Small
Pages: 1852 / 3704M, Empty: 698M, Relocated: 10M, In-Place: 0
[2022-07-13T14:18:38.823+0800][16][info][gc,reloc ] GC(2822) Medium
Pages: 2 / 64M, Empty: 32M, Relocated: 0M, In-Place: 0
[2022-07-13T14:18:38.823+0800][16][info][gc,reloc ] GC(2822) Large
Pages: 0 / 0M, Empty: 0M, Relocated: 0M, In-Place: 0
[2022-07-13T14:18:38.823+0800][16][info][gc,reloc ] GC(2822)
Forwarding Usage: 3M
[2022-07-13T14:18:38.823+0800][16][info][gc ] GC(2822)
Garbage Collection (High Usage) 3768M(94%)->238M(6%)
[2022-07-13T14:18:42.813+0800][23][info][safepoint ] Safepoint
"Cleanup", Time since last: 4000282554 ns, Reaching safepoint: 1161862
ns, At safepoint: 32230 ns, Total: 1194092 ns
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] === Garbage
Collection Statistics
=======================================================================================================================
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ]
Last 10s
Last 10m Last 10h Total
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ]
Avg / Max Avg
/ Max Avg / Max Avg / Max
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Collector:
Garbage Collection Cycle 987.238 / 987.238
256.494 / 987.238 200.744 / 987.238 198.781 / 987.238 ms
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Contention:
Mark Segment Reset Contention 0 / 0
0 / 3 0 / 13 0 / 17 ops/s
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Contention:
Mark SeqNum Reset Contention 0 / 0
0 / 2 0 / 3 0 / 4 ops/s
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Critical:
Allocation Stall 0 / 0
0 / 0 0 / 0 0 / 0 ops/s
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Critical:
Allocation Stall 0.000 / 0.000
0.000 / 0.000 0.000 / 0.000 0.000 / 0.000 ms
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Critical: GC
Locker Stall 0 / 0 0
/ 1 0 / 1 0 / 1 ops/s
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Critical: GC
Locker Stall 0.000 / 0.000 0.001
/ 0.001 0.022 / 0.138 0.032 / 0.197 ms
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Critical:
Relocation Stall 0 / 0
0 / 0 0 / 0 0 / 0 ops/s
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Critical:
Relocation Stall 0.000 / 0.000
0.000 / 0.000 0.000 / 0.000 0.000 / 0.000 ms
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Memory:
Allocation Rate 105 / 128
109 / 240 100 / 308 104 / 352 MB/s
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Memory:
Out Of Memory 0 / 0
0 / 0 0 / 0 0 / 0 ops/s
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Memory:
Page Cache Flush 0 / 0
0 / 0 0 / 0 0 / 0 MB/s
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Memory:
Page Cache Hit L1 51 / 64
54 / 76 49 / 94 51 / 176 ops/s
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Memory:
Page Cache Hit L2 0 / 0
0 / 0 0 / 0 0 / 0 ops/s
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Memory:
Page Cache Hit L3 1 / 16
0 / 16 0 / 16 0 / 123 ops/s
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Memory:
Page Cache Miss 0 / 0
0 / 0 0 / 0 0 / 1 ops/s
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Memory:
Uncommit 0 / 0
0 / 0 0 / 0 0 / 0 MB/s
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Memory:
Undo Object Allocation Failed 1 / 14
0 / 94 0 / 189 0 / 438 ops/s
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Memory:
Undo Object Allocation Succeeded 10 / 109
0 / 109 0 / 571 0 / 571 ops/s
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Memory:
Undo Page Allocation 0 / 4
0 / 4 0 / 7 0 / 9 ops/s
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Phase:
Concurrent Mark 195.357 / 195.357
163.985 / 195.357 149.824 / 233.888 149.336 / 253.310 ms
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Phase:
Concurrent Mark Continue 0.000 / 0.000
0.000 / 0.000 0.000 / 0.000 0.000 / 0.000 ms
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Phase:
Concurrent Mark Free 0.002 / 0.002
0.001 / 0.003 0.001 / 0.035 0.001 / 0.035 ms
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Phase:
Concurrent Process Non-Strong References 43.503 / 43.503
40.257 / 43.503 36.939 / 73.540 35.954 / 73.540 ms
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Phase:
Concurrent Relocate 12.090 / 12.090
9.887 / 13.321 9.672 / 18.334 9.657 / 64.541 ms
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Phase:
Concurrent Reset Relocation Set 0.266 / 0.266
0.247 / 0.377 0.234 / 0.385 0.228 / 0.459 ms
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Phase:
Concurrent Select Relocation Set 3.787 / 3.787
2.893 / 3.787 2.671 / 4.496 2.647 / 9.518 ms
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Phase:
Pause Mark End 0.037 / 0.037
0.036 / 0.059 0.030 / 0.080 0.029 / 0.105 ms
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Phase:
Pause Mark Start 731.329 / 731.329
38.529 / 731.329 0.782 / 731.329 0.344 / 731.329 ms
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Phase:
Pause Relocate Start 0.022 / 0.022
0.022 / 0.032 0.021 / 0.060 0.021 / 0.063 ms
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Subphase:
Concurrent Classes Purge 1.826 / 1.826
1.502 / 2.016 1.290 / 2.861 1.230 / 3.239 ms
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Subphase:
Concurrent Classes Unlink 38.001 / 38.001
35.014 / 38.008 32.344 / 68.815 31.464 / 68.815 ms
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Subphase:
Concurrent Mark 190.810 / 191.151
159.881 / 191.151 146.060 / 230.654 145.558 / 250.339 ms
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Subphase:
Concurrent Mark Try Flush 0.259 / 0.548
0.211 / 0.548 0.197 / 79.168 0.179 / 79.168 ms
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Subphase:
Concurrent Mark Try Terminate 0.545 / 1.065
0.472 / 1.076 0.456 / 5.019 0.449 / 32.389 ms
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Subphase:
Concurrent References Enqueue 0.009 / 0.009
0.002 / 0.009 0.002 / 0.015 0.002 / 0.031 ms
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Subphase:
Concurrent References Process 0.338 / 0.338
0.412 / 0.662 0.297 / 0.828 0.305 / 4.058 ms
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Subphase:
Concurrent Roots ClassLoaderDataGraph 0.376 / 0.659
0.419 / 1.062 0.393 / 1.062 0.392 / 1.062 ms
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Subphase:
Concurrent Roots CodeCache 0.000 / 0.000
0.000 / 0.000 0.000 / 0.000 0.000 / 0.000 ms
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Subphase:
Concurrent Roots JavaThreads 3.345 / 3.622
2.889 / 3.649 2.610 / 4.023 2.636 / 4.221 ms
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Subphase:
Concurrent Roots OopStorageSet 0.103 / 0.110
0.101 / 0.148 0.094 / 0.172 0.092 / 0.748 ms
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Subphase:
Concurrent Weak Roots OopStorageSet 2.779 / 2.780
2.889 / 3.442 2.633 / 3.805 2.588 / 4.245 ms
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] Subphase:
Pause Mark Try Complete 0.000 / 0.000
0.000 / 0.000 0.000 / 0.000 0.003 / 0.006 ms
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ] System:
Java Threads 226 / 234
205 / 234 173 / 234 167 / 234 threads
[2022-07-13T14:18:43.036+0800][18][info][gc,stats ]
=========================================================================================================================================================
In my opinion, this stage is very light. What can cause this phenomenon
Thanks!
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