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Posted to commits@cassandra.apache.org by "Stefan Miklosovic (Jira)" <ji...@apache.org> on 2025/02/03 10:06:00 UTC
[jira] [Updated] (CASSANDRA-13000) slow query log analysis tool
[ https://issues.apache.org/jira/browse/CASSANDRA-13000?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Stefan Miklosovic updated CASSANDRA-13000:
------------------------------------------
Status: In Progress (was: Patch Available)
> slow query log analysis tool
> ----------------------------
>
> Key: CASSANDRA-13000
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13000
> Project: Apache Cassandra
> Issue Type: New Feature
> Components: Legacy/Observability
> Reporter: Jon Haddad
> Assignee: Pedro Gordo
> Priority: Normal
> Fix For: 5.x
>
> Attachments: 0001-Adds-a-cqldumpslow-tool-which-analyses-the-debug-log.patch, 0001-Adds-a-cqldumpslow-tool-which-analyses-the-debug-log.patch, csqldumpslow.py
>
>
> As a follow up to CASSANDRA-12403, it would be very helpful to have a tool to process the slow queries that are logged. In the MySQL world, there's a tool called mysqldumpslow, which processes a slow query log, abstracts the parameters to prepared statements, and shows the queries which are causing problems based on frequency. The {{mysqldumpslow}} utillity shows an aggregated count & time statistics spent on slow queries. For instance:
> {code}shell> mysqldumpslow
> Reading mysql slow query log from /usr/local/mysql/data/mysqld51-apple-slow.log
> Count: 1 Time=4.32s (4s) Lock=0.00s (0s) Rows=0.0 (0), root[root]@localhost
> insert into t2 select * from t1
> Count: 3 Time=2.53s (7s) Lock=0.00s (0s) Rows=0.0 (0), root[root]@localhost
> insert into t2 select * from t1 limit N
> Count: 3 Time=2.13s (6s) Lock=0.00s (0s) Rows=0.0 (0), root[root]@localhost
> insert into t1 select * from t1{code}
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