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https://issues.apache.org/jira/browse/CASSANDRA-7928?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14139999#comment-14139999
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sankalp kohli commented on CASSANDRA-7928:
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[~jjordan] that will not work since it is stored along with the stable and
will require an upgrade sstable. Created CASSANDRA-7978.
> Digest queries do not require alder32 checks
> --------------------------------------------
>
> Key: CASSANDRA-7928
> URL: https://issues.apache.org/jira/browse/CASSANDRA-7928
> Project: Cassandra
> Issue Type: Improvement
> Reporter: sankalp kohli
> Assignee: T Jake Luciani
> Priority: Minor
> Labels: performance
> Fix For: 2.1.1
>
>
> While reading data from sstables, C* does Alder32 checks for any data being
> read. We have seen that this causes higher CPU usage while doing kernel
> profiling. These checks might not be useful for digest queries as they will
> have a different digest in case of corruption.
>
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