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From "Abdul Patel (JIRA)" <j...@apache.org>
Subject [jira] [Created] (CASSANDRA-14495) Memory Leak /High Memory usage post 3.11.2 upgrade
Date Mon, 04 Jun 2018 13:48:00 GMT
Abdul Patel created CASSANDRA-14495:
---------------------------------------

             Summary: 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


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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