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https://github.com/lesuisse/repro-issue-percona-high-cpu-usage-select-for-update

Last synced: 16 days ago
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Host: GitHub
URL: https://github.com/lesuisse/repro-issue-percona-high-cpu-usage-select-for-update
Owner: LeSuisse
License: mit
Created: 2024-06-05T12:05:00.000Z (5 months ago)
Default Branch: main
Last Pushed: 2024-06-05T12:49:57.000Z (5 months ago)
Last Synced: 2024-10-08T13:19:13.503Z (about 1 month ago)
Language: PHP
Homepage: https://perconadev.atlassian.net/browse/PS-8839
Size: 45.9 KB
Stars: 0
Watchers: 1
Forks: 0
Open Issues: 0
Metadata Files:
- Readme: README.md
- License: LICENSE

Awesome Lists containing this project

README

        # Quick (& dirty) reproduction scenario of high CPU usage when running `SELECT ... FOR UPDATE` queries on Percona

You can start the stack using Docker Compose with `docker compose up`.

2 DB servers running the [same workload](./repro.php) will be started:

* one is using the `percona` image and consumes more resources than expected

* the other is using the `mysql` image

## Flamegraph

On my initial Rocky Linux 9 environment I generated flamegraphes of MySQL and Percona running the same workload.

Percona: ![Flamegraph issue Percona](./flamegraph-percona.svg)

MySQL: ![Flamegraph issue MySQL](./flamegraph-mysql.svg)