[jira] [Updated] (CASSANDRA-20923) Segregate SAI's query metrics per query type

["Michael Semb Wever (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-20923?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Michael Semb Wever updated CASSANDRA-20923:
-------------------------------------------
    Fix Version/s: 5.0.x
                   5.x

> Segregate SAI's query metrics per query type
> --------------------------------------------
>
>                 Key: CASSANDRA-20923
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-20923
>             Project: Apache Cassandra
>          Issue Type: Improvement
>          Components: Feature/SAI
>            Reporter: Michael Semb Wever
>            Priority: Normal
>             Fix For: 5.0.x, 5.x
>
>
> SAI's tracks query metrics providing info about latency, partition reads, filtered rows, etc. These metrics are for all the SAI queries for a certain table. When we see problems in queries, for example a high latency, questions that can usually come next are what query is producing this high latency? Are there vector queries? Are queries for a single partition? In that case, what is the latency of those queries? How many rows are they selecting? To answer those questions, I think it can be useful to track metrics for specific types of query.
> Tracking is done in a {{TableQueryMetrics}} associated to the table. 
> This PR only adds a few type of queries: filtering, top-k, single-partition and range queries. If we need new types in the future, this patch should make it easy to add separate metrics for them, possibly with an one-liner.
> The general query metrics remain untouched, this PR only adds new ones.
> More background info from downstream work in https://github.com/datastax/cassandra/pull/1969 and https://github.com/datastax/cassandra/pull/2015



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