From 3bf9042c24b6c133f98c59edffc5b7eac8bccc0c Mon Sep 17 00:00:00 2001 From: xixirangrang Date: Mon, 28 Oct 2024 17:38:10 +0800 Subject: [PATCH 1/3] Apply suggestions from code review Co-authored-by: Roger Song --- releases/release-8.4.0.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/releases/release-8.4.0.md b/releases/release-8.4.0.md index 43f1248c8a869..603718e2e39b6 100644 --- a/releases/release-8.4.0.md +++ b/releases/release-8.4.0.md @@ -154,7 +154,7 @@ Quick access: [Quick start](https://docs.pingcap.com/tidb/v8.4/quick-start-with- * Support switching resource groups for runaway queries [#54434](https://github.com/pingcap/tidb/issues/54434) @[JmPotato](https://github.com/JmPotato) **tw@hfxsd** - Starting from TiDB v8.4.0, you can switch the resource group of runaway queries to a specific one. If the `COOLDOWN` mechanism fails to lower resource consumption, you can create a [resource group](/tidb-resource-control.md#create-a-resource-group) and set the `SWITCH_GROUP` parameter to move identified runaway queries to this group. Meanwhile, subsequent queries within the same session will continue to execute in the original resource group. By switching resource groups, you can manage resource usage more precisely, and control the resource consumption more strictly. + Starting from TiDB v8.4.0, you can switch the resource group of runaway queries to a specific one. If the `COOLDOWN` mechanism fails to lower resource consumption, you can create a [resource group](/tidb-resource-control.md#create-a-resource-group), limit its resource size, and set the `SWITCH_GROUP` parameter to move identified runaway queries to this group. Meanwhile, subsequent queries within the same session will continue to execute in the original resource group. By switching resource groups, you can manage resource usage more precisely, and control the resource consumption more strictly. For more information, see [documentation](/tidb-resource-control.md#query_limit-parameters). From d663eaa6ed293bb9b7ab33cce323f2d8bf5a457e Mon Sep 17 00:00:00 2001 From: xixirangrang Date: Wed, 30 Oct 2024 10:30:59 +0800 Subject: [PATCH 2/3] Update releases/release-8.4.0.md Co-authored-by: you06 --- releases/release-8.4.0.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/releases/release-8.4.0.md b/releases/release-8.4.0.md index 603718e2e39b6..f1662bc8000aa 100644 --- a/releases/release-8.4.0.md +++ b/releases/release-8.4.0.md @@ -362,7 +362,7 @@ Starting from v8.4.0, the following contents are removed from the `TiDB-communit + TiDB - Optimize the efficiency of constructing BatchCop tasks when scanning a large amount of data [#55915](https://github.com/pingcap/tidb/issues/55915) [#55413](https://github.com/pingcap/tidb/issues/55413) @[wshwsh12](https://github.com/wshwsh12) **tw@caiqian** - - Optimize MEMDB implementation to reduce write latency in transactions and TiDB CPU usage [#55287](https://github.com/pingcap/tidb/issues/55287) @[you06](https://github.com/you06) **tw@hfxsd** + - Optimize the transaction's buffer to reduce write latency in transactions and TiDB CPU usage [#55287](https://github.com/pingcap/tidb/issues/55287) @[you06](https://github.com/you06) **tw@hfxsd** - Optimize the execution performance of DML statements when the system variable `tidb_dml_type` is set to `"bulk"` [#50215](https://github.com/pingcap/tidb/issues/50215) @[ekexium](https://github.com/ekexium) **tw@qiancai** - Support using [Optimizer Fix Control 47400](/optimizer-fix-controls.md#47400-new-in-v840) to control whether the optimizer limits the minimum value estimated for `estRows` to `1`, which is consistent with databases such as Oracle and DB2 [#47400](https://github.com/pingcap/tidb/issues/47400) @[terry1purcell](https://github.com/terry1purcell) **tw@Oreoxmt** - Add write control to the [`mysql.tidb_runaway_queries`](/mysql-schema/mysql-schema.md#system-tables-related-to-runaway-queries) log table to reduce overhead caused by a large number of concurrent writes [#54434](https://github.com/pingcap/tidb/issues/54434) @[HuSharp](https://github.com/HuSharp) **tw@lilin90** From 7a749c27b0486229e13469933fafba75d4cb7473 Mon Sep 17 00:00:00 2001 From: Aolin Date: Wed, 30 Oct 2024 15:46:33 +0800 Subject: [PATCH 3/3] update release date --- releases/release-8.4.0.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/releases/release-8.4.0.md b/releases/release-8.4.0.md index f1662bc8000aa..bcdca233061e6 100644 --- a/releases/release-8.4.0.md +++ b/releases/release-8.4.0.md @@ -5,7 +5,7 @@ summary: Learn about the new features, compatibility changes, improvements, and # TiDB 8.4.0 Release Notes -Release date: October 30, 2024 +Release date: xx xx, 2024 TiDB version: 8.4.0