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

pingcap · Dec 28, 2022 · a27c7fd · a27c7fd
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diff --git a/statistics.md b/statistics.md
@@ -217,7 +217,7 @@ When the ratio of the number of modified rows to the total number of rows of `tb
 >
 > Currently, the automatic update does not record the configuration items input at manual `ANALYZE`. Therefore, when you use the `WITH` syntax to control the collecting behavior of `ANALYZE`, you need to manually set scheduled tasks to collect statistics.
 
-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
@@ -450,6 +450,10 @@ 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.