[
https://issues.apache.org/jira/browse/CASSANDRA-18167?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Caleb Rackliffe updated CASSANDRA-18167:
----------------------------------------
Epic Link: CASSANDRA-19224 (was: CASSANDRA-18473)
> Bypass row-awareness for small partitions
> -----------------------------------------
>
> Key: CASSANDRA-18167
> URL: https://issues.apache.org/jira/browse/CASSANDRA-18167
> Project: Cassandra
> Issue Type: Improvement
> Components: Feature/SAI
> Reporter: Mike Adamson
> Priority: Normal
> Labels: SAI
>
> SAI supports row-awareness in that it indexes both the partition key and the
> clustering key of a row. This improves query performance significantly for
> wide partitions with many rows but it can impact performance for small
> partitions where it could make sense to bypass row-awareness post-filter the
> results (read the whole partition) or batch rows for a single partition.
> However this is achieved it would be necessary for the index to have an idea
> of the size of the partition being read and to be aware of whether reading
> the whole partition is likely to improve read performance.
> SAI is aware of partition sizes during indexing so one option would be feed
> these sizes into a histogram in the index metadata and apply a set of rules
> to this metadata to decide whether we should attempt any optimisation.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
---------------------------------------------------------------------
To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org
For additional commands, e-mail: commits-h...@cassandra.apache.org
