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Posted to commits@cassandra.apache.org by "C. Scott Andreas (JIRA)" <ji...@apache.org> on 2018/11/19 05:59:01 UTC
[jira] [Updated] (CASSANDRA-8048) Add WARN for large resultsets
[ https://issues.apache.org/jira/browse/CASSANDRA-8048?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
C. Scott Andreas updated CASSANDRA-8048:
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Component/s: Observability
> Add WARN for large resultsets
> -----------------------------
>
> Key: CASSANDRA-8048
> URL: https://issues.apache.org/jira/browse/CASSANDRA-8048
> Project: Cassandra
> Issue Type: New Feature
> Components: Observability
> Reporter: Adam Hattrell
> Priority: Major
>
> Similarly to how we warn on excessive tombstones or large batches - it would be useful to warn if we come across a large row over a specific threshold.
> If not too intrusive it could provide us with a smoking gun for gc thrashing type issues.
> To put some meat on the bones - I've recently seen someone store a 1Gb blob and then try to work round it by splitting it into 3 columns of 330 Mb each. Neither gave particularly good performance.
> On the opposite side of the coin - a large number of columns grabbed at once can also lead to problems.
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