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https://issues.apache.org/jira/browse/CASSANDRA-11450?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dikang Gu reassigned CASSANDRA-11450:
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Assignee: Dikang Gu
> Should not search for the index of a column if the table is not using
> secondaryIndex.
> -------------------------------------------------------------------------------------
>
> Key: CASSANDRA-11450
> URL: https://issues.apache.org/jira/browse/CASSANDRA-11450
> Project: Cassandra
> Issue Type: Bug
> Components: Compaction
> Reporter: Dikang Gu
> Assignee: Dikang Gu
> Fix For: 2.2.x
>
>
> We are not using secondary index in our cluster, but when I profile the
> compaction, I find that ~5.5% of the compaction time is spent on this line of
> the code function LazilyCompactedRow.Reducer.reduce():
> if (cell.isLive() && !container.getColumn(cell.name()).equals(cell))
> before this line there is check to skip the look up, which seems to be not
> working:
> // skip the index-update checks if there is no indexing needed since they
> are a bit expensive
> if (indexer == SecondaryIndexManager.nullUpdater)
> return;
> My patch is to set the indexer to be nullUpdater if the table has no
> associated index.
> Let me know if it's the right fix.
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