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https://issues.apache.org/jira/browse/CASSANDRA-21160?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18093075#comment-18093075
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Abhijeet Dubey edited comment on CASSANDRA-21160 at 7/1/26 10:09 PM:
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Used [https://github.com/apache/cassandra-easy-stress/pull/86]to benchmark the
improvements
||threads||baseline r/s||patched r/s||speedup||base p99 (ms)||patch p99 (ms)||
|1|328.43|2756.47|8.4x|2962.69|15.7|
|2|316.16|1424.11|4.5x|4093|2.76|
|4|317.29|2710.41|8.5x|3910.54|15.1|
|8|333.06|1426.25|4.3x|2479.58|4.04|
|16|328.26|2785.71|8.5x|2894.77|13.62|
was (Author: JIRAUSER306221):
||threads||baseline r/s||patched r/s||speedup||base p99 (ms)||patch p99 (ms)||
|1|328.43|2756.47|8.4x|2962.69|15.7|
|2|316.16|1424.11|4.5x|4093|2.76|
|4|317.29|2710.41|8.5x|3910.54|15.1|
|8|333.06|1426.25|4.3x|2479.58|4.04|
|16|328.26|2785.71|8.5x|2894.77|13.62|
> Make synchronization on VectorMemoryIndex inserts more granular
> ---------------------------------------------------------------
>
> Key: CASSANDRA-21160
> URL: https://issues.apache.org/jira/browse/CASSANDRA-21160
> Project: Apache Cassandra
> Issue Type: Improvement
> Components: Feature/Vector Search
> Reporter: Michael Marshall
> Assignee: Caleb Rackliffe
> Priority: Normal
> Fix For: 5.0.x, 6.x, 7.x
>
> Attachments: ci_summary-1.html, ci_summary.html,
> result_details.tar-1.gz, result_details.tar.gz
>
> Time Spent: 1h 10m
> Remaining Estimate: 0h
>
> The `VectorMemoryIndex` supports asynchronous additions to the graph.
> However, the `synchronous` keyword for the `add` method prevents this and
> therefore means we are adding a point of contention that is unnecessary.
> As part of this ticket, we should verify my understanding that writes can be
> concurrent and then drop the keyword.
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