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Dec 9, 2024
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Announce GA of memory control on stats cache (#19604) #19626

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Update releases/release-7.4.0.md
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@hfxsd @ti-chi-bot
hfxsd authored and ti-chi-bot committed Dec 9, 2024
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Expand Up @@ -201,7 +201,7 @@ Quick access: [Quick start](https://docs.pingcap.com/tidb/v7.4/quick-start-with-

* Memory control for the statistics cache is generally available (GA) [#45367](https://github.com/pingcap/tidb/issues/45367) @[hawkingrei](https://github.com/hawkingrei)

Starting from v6.1.0, TiDB introduces the system variable [`tidb_stats_cache_mem_quota`](https://github.com/system-variables.md#tidb_stats_cache_mem_quota-new-in-v610), allowing TiDB instances to cache table statistics for faster execution plan generation and improved SQL performance. By configuring the system variable, you can limit memory usage for the statistics cache. When the cache reaches its limit, TiDB automatically evicts inactive entries, helping control instance memory usage and improve stability.
TiDB instances can cache table statistics for faster execution plan generation and improved SQL performance. Starting from v6.1.0, TiDB introduces the system variable [`tidb_stats_cache_mem_quota`](https://github.com/system-variables.md#tidb_stats_cache_mem_quota-new-in-v610). By configuring the system variable, you can limit memory usage for the statistics cache. When the cache reaches its limit, TiDB automatically evicts inactive entries, helping control instance memory usage and improve stability.

Starting from v7.4.0, this feature becomes generally available (GA).

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