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https://issues.apache.org/jira/browse/CASSANDRA-10981?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jeremy Hanna updated CASSANDRA-10981:
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Component/s: Materialized Views
> Consider striping view locks by key and cfid
> --------------------------------------------
>
> Key: CASSANDRA-10981
> URL: https://issues.apache.org/jira/browse/CASSANDRA-10981
> Project: Cassandra
> Issue Type: Improvement
> Components: Coordination, Materialized Views
> Reporter: Tyler Hobbs
> Assignee: Tyler Hobbs
> Priority: Minor
> Fix For: 3.4
>
>
> We use a striped lock to protect updates to tables with materialized views,
> and the lock is currently striped by the partition key of the {{Mutation}}.
> This causes concurrent updates to separate tables with the same partition key
> to contend for the same lock, resulting in one or more of the mutations being
> rescheduled on the {{MUTATION}} threadpool (potentially becoming an
> asynchronous operation instead a synchronous operations, from the perspective
> of local internal modifications).
> Since it's probably fairly common to use the same partition key across
> multiple tables, I suggest that we add the cfid of the affected table to the
> lock striping, and acquire one lock per affected table (with the same
> rescheduling-under-contention behavior).
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