v5.3-v5.0: emphasize experimental for stats feedback (#11750) (#11759)

pingcap · Dec 28, 2022 · 61b39d6 · 61b39d6
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diff --git a/statistics.md b/statistics.md
@@ -147,7 +147,7 @@ Three system variables related to automatic update of statistics are as follows:
 
 When the ratio of the number of modified rows to the total number of rows of `tbl` in a table is greater than `tidb_auto_analyze_ratio`, and the current time is between `tidb_auto_analyze_start_time` and `tidb_auto_analyze_end_time`, TiDB executes the `ANALYZE TABLE tbl` statement in the background to automatically update the statistics of this table.
 
-Before v5.0, when the query is executed, TiDB collects feedback with the probability of `feedback-probability` and uses it to update the histogram and Count-Min Sketch. **In v5.0, this feature is disabled by default, and it is not recommended to enable this feature.**
+Before v5.0, when the query is executed, TiDB collects feedback with the probability of `feedback-probability` and uses it to update the histogram and Count-Min Sketch. **In the current version, this feature is experimental and disabled by default, and it is not recommended to enable this feature in the production environment.**
 
 ### Control `ANALYZE` concurrency
 

diff --git a/tidb-configuration-file.md b/tidb-configuration-file.md
@@ -423,6 +423,10 @@ Configuration items related to performance.
 
 ### `feedback-probability`
 
+> **Warning:**
+>
+> `feedback-probability` is an experimental feature in the current version. It is not recommended to use it in the production environment.
+
 - The probability that TiDB collects the feedback statistics of each query.
 - Default value: `0`
 - This feature is disabled by default, and it is not recommended to enable this feature. If it is enabled, TiDB collects the feedback of each query at the probability of `feedback-probability`, to update statistics.