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https://issues.apache.org/jira/browse/CASSANDRA-13738?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16112126#comment-16112126
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Kurt Greaves commented on CASSANDRA-13738:
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This has been around for a long time - haven't had the opportunity to find out
what the exact cause was but this makes sense. I've definitely seen it in 3.7.
Pretty sure I've also seen it in 3.0 and 2.1 as well. I don't think it happens
in all versions, or at least for some reason it doesn't happen on all clusters.
> Load is over calculated after each IndexSummaryRedistribution
> -------------------------------------------------------------
>
> Key: CASSANDRA-13738
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13738
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Reporter: Jay Zhuang
> Assignee: Jay Zhuang
> Fix For: 3.0.x, 3.11.x, 4.x
>
> Attachments: sizeIssue.png
>
>
> For example, here is one of our cluster with about 500GB per node, but
> {{nodetool status}} shows far more load than it actually is and keeps
> increasing, restarting the process will reset the load, but keeps increasing
> afterwards:
> {noformat}
> Status=Up/Down
> |/ State=Normal/Leaving/Joining/Moving
> -- Address Load Tokens Owns (effective) Host ID
> Rack
> UN IP1***** 13.52 TB 256 100.0%
> c4c31e0a-3f01-49f7-8a22-33043737975d rac1
> UN IP2***** 14.25 TB 256 100.0%
> efec4980-ec9e-4424-8a21-ce7ddaf80aa0 rac1
> UN IP3***** 13.52 TB 256 100.0%
> 7dbcfdfc-9c07-4b1a-a4b9-970b715ebed8 rac1
> UN IP4***** 22.13 TB 256 100.0%
> 8879e6c4-93e3-4cc5-b957-f999c6b9b563 rac1
> UN IP5***** 18.02 TB 256 100.0%
> 4a1eaf22-4a83-4736-9e1c-12f898d685fa rac1
> UN IP6***** 11.68 TB 256 100.0%
> d633c591-28af-42cc-bc5e-47d1c8bcf50f rac1
> {noformat}
> !sizeIssue.png|test!
> The root cause is if the SSTable index summary is redistributed (typically
> executes hourly), the updated SSTable size is added again.
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