From 9d2504c0426be595a893ec11271eeae3b5da6851 Mon Sep 17 00:00:00 2001
From: Weizhen Wang <wangweizhen@pingcap.com>
Date: Wed, 18 Sep 2024 11:51:06 +0800
Subject: [PATCH 1/3] *: add tidb_auto_analyze_concurrency

Signed-off-by: Weizhen Wang <wangweizhen@pingcap.com>
---
 system-variables.md | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/system-variables.md b/system-variables.md
index 07981bf18e5cc..b356d577dfb4f 100644
--- a/system-variables.md
+++ b/system-variables.md
@@ -1199,6 +1199,15 @@ mysql> SELECT job_info FROM mysql.analyze_jobs ORDER BY end_time DESC LIMIT 1;
 1 row in set (0.00 sec)
 ```
 
+### tidb_auto_analyze_concurrency <span class="version-mark">New in v8.4.0</span>
+
+- Scope: GLOBAL
+- Persists to cluster: Yes
+- Applies to hint [SET_VAR](/optimizer-hints.md#set_varvar_namevar_value): No
+- Default value: `2`
+- Range: `[1, 2147483647]`
+- This variable is used to set the concurrency of executing the automatic update of statistics.
+
 ### tidb_auto_analyze_end_time
 
 - Scope: GLOBAL

From 29114fb3d0654972d0746ac9f6fd778f25c2ef63 Mon Sep 17 00:00:00 2001
From: Aolin <aolin.zhang@pingcap.com>
Date: Mon, 23 Sep 2024 14:35:03 +0800
Subject: [PATCH 2/3] add type

Signed-off-by: Aolin <aolin.zhang@pingcap.com>
---
 system-variables.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/system-variables.md b/system-variables.md
index b356d577dfb4f..84851ff1bb267 100644
--- a/system-variables.md
+++ b/system-variables.md
@@ -1204,6 +1204,7 @@ mysql> SELECT job_info FROM mysql.analyze_jobs ORDER BY end_time DESC LIMIT 1;
 - Scope: GLOBAL
 - Persists to cluster: Yes
 - Applies to hint [SET_VAR](/optimizer-hints.md#set_varvar_namevar_value): No
+- Type: Integer
 - Default value: `2`
 - Range: `[1, 2147483647]`
 - This variable is used to set the concurrency of executing the automatic update of statistics.

From 9de3d6a7be881f4723828cc45831071a41d24505 Mon Sep 17 00:00:00 2001
From: Weizhen Wang <wangweizhen@pingcap.com>
Date: Tue, 24 Sep 2024 13:11:45 +0800
Subject: [PATCH 3/3] Update system-variables.md

---
 system-variables.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/system-variables.md b/system-variables.md
index 84851ff1bb267..ab58df0c7eb8a 100644
--- a/system-variables.md
+++ b/system-variables.md
@@ -1205,7 +1205,7 @@ mysql> SELECT job_info FROM mysql.analyze_jobs ORDER BY end_time DESC LIMIT 1;
 - Persists to cluster: Yes
 - Applies to hint [SET_VAR](/optimizer-hints.md#set_varvar_namevar_value): No
 - Type: Integer
-- Default value: `2`
+- Default value: `1`
 - Range: `[1, 2147483647]`
 - This variable is used to set the concurrency of executing the automatic update of statistics.