# MySQL 8.4 - High memory consumption

**URL:** <https://forums.percona.com/t/mysql-8-4-high-memory-consumption/35935>\
**Category:** MySQL & MariaDB\
**Created:** [January 2, 2025, 6:08pm UTC](https://forums.percona.com/t/mysql-8-4-high-memory-consumption/35935 "2025-01-02T18:08:12Z")\
**Posts on this page:** 7\
**Page:** 2

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**Author:** ![matthewb](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/matthewb/32/34_2.png) [@matthewb](https://forums.percona.com/u/matthewb)\
**Post date:** [January 9, 2025, 9:26pm UTC](https://forums.percona.com/t/mysql-8-4-high-memory-consumption/35935/21 "2025-01-09T21:26:11Z")

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Thanks. I see their reply. Did you run 5.7 on this same machine, with same operating system? Or did you also upgrade OS?

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**Author:** ![CharlesR](https://avatars.discourse-cdn.com/v4/letter/c/54ee81/32.png) [@CharlesR](https://forums.percona.com/u/CharlesR)\
**Post date:** [January 9, 2025, 9:45pm UTC](https://forums.percona.com/t/mysql-8-4-high-memory-consumption/35935/22 "2025-01-09T21:45:02Z")

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5.7 was in Ubuntu version 22

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**Author:** ![CharlesR](https://avatars.discourse-cdn.com/v4/letter/c/54ee81/32.png) [@CharlesR](https://forums.percona.com/u/CharlesR)\
**Post date:** [January 17, 2025, 3:13pm UTC](https://forums.percona.com/t/mysql-8-4-high-memory-consumption/35935/23 "2025-01-17T15:13:27Z")

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Hi @matthewb ,

Maybe I should have made this configuration on my OS.

> **[Don’t Start Using Your MySQL Server Until You’ve Configured Your OS](https://www.percona.com/blog/dont-start-using-your-mysql-server-until-youve-configured-your-os/)**
>
> Reviewing the best practices for optimization we follow in Percona Managed Services before using a MySQL server in production and stage environment.

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<div class="post-metadata">

**Author:** ![matthewb](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/matthewb/32/34_2.png) [@matthewb](https://forums.percona.com/u/matthewb)\
**Post date:** [January 17, 2025, 5:46pm UTC](https://forums.percona.com/t/mysql-8-4-high-memory-consumption/35935/24 "2025-01-17T17:46:56Z")

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jemalloc is certainly a good thing. PS detects if this is installed. I don’t like messing with OOM score because that’s more of a band-aid than fixing the issue.

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**Author:** ![CharlesR](https://avatars.discourse-cdn.com/v4/letter/c/54ee81/32.png) [@CharlesR](https://forums.percona.com/u/CharlesR)\
**Post date:** [January 17, 2025, 5:55pm UTC](https://forums.percona.com/t/mysql-8-4-high-memory-consumption/35935/25 "2025-01-17T17:55:37Z")

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I did the tests and now the memory is being freed.

Shouldn’t this already be the Installation default?

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<div class="post-metadata">

**Author:** ![matthewb](https://sea1.discourse-cdn.com/flex019/user_avatar/forums.percona.com/matthewb/32/34_2.png) [@matthewb](https://forums.percona.com/u/matthewb)\
**Post date:** [January 17, 2025, 8:13pm UTC](https://forums.percona.com/t/mysql-8-4-high-memory-consumption/35935/26 "2025-01-17T20:13:20Z")

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> [@CharlesR](#):
>
> Shouldn’t this already be the Installation default?

Not all workloads are the same, not all OS is the same, etc. jemalloc does not fix 100% of issues.

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<div class="post-metadata">

**Author:** ![CharlesR](https://avatars.discourse-cdn.com/v4/letter/c/54ee81/32.png) [@CharlesR](https://forums.percona.com/u/CharlesR)\
**Post date:** [January 23, 2025, 6:48pm UTC](https://forums.percona.com/t/mysql-8-4-high-memory-consumption/35935/28 "2025-01-23T18:48:18Z")

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> [@matthewb](#):
>
> jemalloc

Using jemalloc the problem was solved.

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