[jira] [Updated] (CASSANDRA-21702) Reduce prepared statement binding overhead for Cassandra stress

["Dmitry Konstantinov (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-21702?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dmitry Konstantinov updated CASSANDRA-21702:
--------------------------------------------
    Status: Ready to Commit  (was: Review In Progress)

> Reduce prepared statement binding overhead for Cassandra stress 
> ----------------------------------------------------------------
>
>                 Key: CASSANDRA-21702
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-21702
>             Project: Apache Cassandra
>          Issue Type: Improvement
>          Components: Tool/stress
>            Reporter: Dmitry Konstantinov
>            Assignee: Dmitry Konstantinov
>            Priority: Normal
>             Fix For: 6.0.x, 7.x
>
>         Attachments: bind_lookup_overhead.png, stress_bind_after_cpu.html, stress_bind_before_cpu.html
>
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> Under high 10-row, 5 value column batch write load Cassandra stress burn a lot of CPU to lookup Codecs for bound values: 21.5% of overall CPU consumption ("codecFor" to seach in profiles).
> To avoid this overhead we can retrieve required codecs for a prepared statement once and then use them explicitly when we bind values to avoid codec lookup cost. It drops the codecFor lookup overhead to 0.
>  [^stress_bind_before_cpu.html] 
>  [^stress_bind_after_cpu.html] 
>  !bind_lookup_overhead.png|width=400! 



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