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https://issues.apache.org/jira/browse/CASSANDRA-14495?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16591123#comment-16591123
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Ma Dega commented on CASSANDRA-14495:
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[~aby786] [~cnlwsu] Looks like I'm experiencing a similar problem with 3.11.2
except in mine I see long GC pauses even in G1GC. Any idea how to optimize
this to run through GC quicker? Would adding
XX:InitiatingHeapOccupancyPercent=55 help this situation?
INFO [Service Thread] 2018-07-29 11:31:35,604 GCInspector.java:284 - G1 Young
Generation GC in 517ms. G1 Eden Space: 2306867200 -> 0; G1 Old Gen:
15267266816 -> 15594422528; G1 Survivor Space: 243269632 -> 318767104;
INFO [Service Thread] 2018-07-29 11:31:37,408 GCInspector.java:284 - G1 Young
Generation GC in 510ms. G1 Eden Space: 1560281088 -> 0; G1 Old Gen:
15594422528 -> 16005464320; G1 Survivor Space: 318767104 -> 234881024;
INFO [Service Thread] 2018-07-29 11:31:39,815 GCInspector.java:284 - G1 Young
Generation GC in 569ms. G1 Eden Space: 2348810240 -> 0; G1 Old Gen:
16005464320 -> 16278094088; G1 Survivor Space: 234881024 -> 327155712;
> Memory Leak /High Memory usage post 3.11.2 upgrade
> --------------------------------------------------
>
> Key: CASSANDRA-14495
> URL: https://issues.apache.org/jira/browse/CASSANDRA-14495
> Project: Cassandra
> Issue Type: Bug
> Components: Metrics
> Reporter: Abdul Patel
> Priority: Major
> Attachments: cas_heap.txt
>
>
> Hi All,
>
> I recently upgraded my non prod cassandra cluster( 4 nodes single DC) from
> 3.10 to 3.11.2 version.
> No issues reported apart from only nodetool info reporting 80% usage .
> I intially had 16GB memory on each node, later i bumped up to 20GB, and
> rebooted all nodes.
> Waited for an week and now again i have seen memory usage more than 80% ,
> 16GB + .
> this means some memory leaks are happening over the time.
> Any one has faced such issue or do we have any workaround ? my 3.11.2 version
> upgrade rollout has been halted because of this bug.
> ===================================================================
> ID : 65b64f5a-7fe6-4036-94c8-8da9c57718cc
> Gossip active : true
> Thrift active : true
> Native Transport active: true
> Load : 985.24 MiB
> Generation No : 1526923117
> Uptime (seconds) : 1097684
> Heap Memory (MB) : 16875.64 / 20480.00
> Off Heap Memory (MB) : 20.42
> Data Center : DC7
> Rack : rac1
> Exceptions : 0
> Key Cache : entries 3569, size 421.44 KiB, capacity 100 MiB,
> 7931933 hits, 8098632 requests, 0.979 recent hit rate, 14400 save period in
> seconds
> Row Cache : entries 0, size 0 bytes, capacity 0 bytes, 0 hits, 0
> requests, NaN recent hit rate, 0 save period in seconds
> Counter Cache : entries 0, size 0 bytes, capacity 50 MiB, 0 hits, 0
> requests, NaN recent hit rate, 7200 save period in seconds
> Chunk Cache : entries 2361, size 147.56 MiB, capacity 3.97 GiB,
> 2412803 misses, 72594047 requests, 0.967 recent hit rate, NaN microseconds
> miss latency
> Percent Repaired : 99.88086234106282%
> Token : (invoke with -T/--tokens to see all 256 tokens)
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