Hi everyone,

We have 3 cluster solr running in 3 different machines with an index size
of 300 GB.
RAM: 300 GB per node
Heap - Xms: 240GB Xmx: 300GB
Index size: 300GB

GC_TUNE="-XX:+UseG1GC
-XX:InitiatingHeapOccupancyPercent=45
-XX:ConcGCThreads=6
-XX:ParallelGCThreads=30
-XX:G1ReservePercent=20

<autoCommit>
     <maxTime>${solr.autoCommit.maxTime:400000}</maxTime>
     <openSearcher>false</openSearcher>
   </autoCommit>

 <autoSoftCommit>
     <maxTime>${solr.autoSoftCommit.maxTime:-1}</maxTime>
   </autoSoftCommit>

[image: image.png]

*Our cloud servers suddenly stopped yesterday. When we try to restart, our
JVM heap size goes to max of 300 GB just in few seconds and we get the
following message before stopping automatically.*



Heap before GC invocations=0 (full 0):
garbage-first heap   total 251658240K, used 360448K [0x00007eba80000000,
0x00007eba8200f000, 0x00007f0580000000)
 region size 32768K, 12 young (393216K), 0 survivors (0K)
Metaspace       used 20504K, capacity 21158K, committed 21248K, reserved
22528K
2021-05-10T05:31:59.511+0000: 3.036: [GC pause (Metadata GC Threshold)
(young) (initial-mark)
Desired survivor size 805306368 bytes, new threshold 15 (max 15)




{Heap before GC invocations=11 (full 0):
garbage-first heap   total 288849920K, used 20398080K [0x00007eba80000000,
0x00007eba82011378, 0x00007f0580000000)
 region size 32768K, 440 young (14417920K), 54 survivors (1769472K)
Metaspace       used 58413K, capacity 61495K, committed 61696K, reserved
63488K
2021-05-10T05:33:15.477+0000: 79.002: [GC pause (G1 Evacuation Pause)
(young)
Desired survivor size 922746880 bytes, new threshold 1 (max 15)
- age   1: 1043976736 bytes, 1043976736 total
- age   2:  766998080 bytes, 1810974816 total
, 0.4319767 secs]
  [Parallel Time: 408.3 ms, GC Workers: 30]
     [GC Worker Start (ms): Min: 79002.5, Avg: 79003.0, Max: 79003.6, Diff:
1.2]
     [Ext Root Scanning (ms): Min: 0.1, Avg: 0.8, Max: 2.7, Diff: 2.6, Sum:
23.7]
     [Update RS (ms): Min: 0.0, Avg: 1.7, Max: 3.1, Diff: 3.1, Sum: 51.7]
        [Processed Buffers: Min: 0, Avg: 3.8, Max: 17, Diff: 17, Sum: 113]
     [Scan RS (ms): Min: 13.9, Avg: 15.8, Max: 16.7, Diff: 2.8, Sum: 474.0]
     [Code Root Scanning (ms): Min: 0.0, Avg: 0.1, Max: 2.1, Diff: 2.1,
Sum: 4.3]
     [Object Copy (ms): Min: 385.5, Avg: 387.5, Max: 390.6, Diff: 5.1, Sum:
11624.2]
     [Termination (ms): Min: 0.1, Avg: 0.5, Max: 0.9, Diff: 0.9, Sum: 13.8]
        [Termination Attempts: Min: 1, Avg: 82.1, Max: 172, Diff: 171, Sum:
2464]
     [GC Worker Other (ms): Min: 0.0, Avg: 0.1, Max: 0.4, Diff: 0.4, Sum:
3.6]
     [GC Worker Total (ms): Min: 405.9, Avg: 406.5, Max: 407.3, Diff: 1.4,
Sum: 12195.3]
     [GC Worker End (ms): Min: 79409.4, Avg: 79409.5, Max: 79409.8, Diff:
0.4]
  [Code Root Fixup: 0.1 ms]
  [Code Root Purge: 0.0 ms]
  [Clear CT: 6.7 ms]
  [Other: 16.9 ms]
     [Choose CSet: 0.0 ms]
     [Ref Proc: 5.2 ms]
     [Ref Enq: 0.0 ms]
     [Redirty Cards: 9.2 ms]
     [Humongous Register: 0.3 ms]
     [Humongous Reclaim: 0.0 ms]
     [Free CSet: 0.7 ms]


Please help to solve this issue!
Thanks in advance!
Regards!
Vigz

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