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This is an automated cherry-pick of pingcap#21725
Signed-off-by: ti-chi-bot <[email protected]>
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‎garbage-collection-configuration.md

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>
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> - For TiDB versions before v7.1.3, it is recommended to disable Compaction Filter to speed up GC.
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> - For TiDB versions from v7.1.3 to v7.5.6, TiDB automatically triggers compaction based on the number of redundant versions in each Region [`region-compact-min-redundant-rows`](/tikv-configuration-file.md#region-compact-min-redundant-rows-new-in-v710) and the percentage of redundant versions [`region-compact-redundant-rows-percent`](/tikv-configuration-file.md#region-compact-redundant-rows-percent-new-in-v710) to improve Compaction Filter GC performance. In this case, adjust these configuration items instead of disabling Compaction Filter.
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> - Starting from v7.5.7, [`region-compact-min-redundant-rows`](/tikv-configuration-file.md#region-compact-min-redundant-rows-new-in-v710) and [`region-compact-redundant-rows-percent`](/tikv-configuration-file.md#region-compact-redundant-rows-percent-new-in-v710) are deprecated. TiDB now automatically triggers compaction based on [`gc.auto-compaction.redundant-rows-threshold`](/tikv-configuration-file.md#redundant-rows-threshold-new-in-v757-and-v900) and [`gc.auto-compaction.redundant-rows-percent-threshold`](/tikv-configuration-file.md#redundant-rows-percent-threshold-new-in-v757-and-v900). In this case, adjust these configuration items instead of disabling Compaction Filter.
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=======
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> - Starting from v7.5.7, [`region-compact-min-redundant-rows`](/tikv-configuration-file.md#region-compact-min-redundant-rows-new-in-v710) and [`region-compact-redundant-rows-percent`](/tikv-configuration-file.md#region-compact-redundant-rows-percent-new-in-v710) are deprecated. TiDB now automatically triggers compaction based on [`gc.auto-compaction.redundant-rows-threshold`](/tikv-configuration-file.md#redundant-rows-threshold-new-in-v757) and [`gc.auto-compaction.redundant-rows-percent-threshold`](/tikv-configuration-file.md#redundant-rows-percent-threshold-new-in-v757). In this case, adjust these configuration items instead of disabling Compaction Filter.
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>>>>>>> 48918f3b0b (tikv: update auto compaction config (#21656) (#21725))
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</CustomContent>

‎releases/release-8.5.3.md

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## Compatibility changes
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- Add the following system variables for internal use by the [Cost Model](/cost-model.md). It is **NOT** recommended to modify these variables: [`tidb_opt_hash_agg_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_hash_agg_cost_factor-new-in-v853-and-v900), [`tidb_opt_hash_join_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_hash_join_cost_factor-new-in-v853-and-v900), [`tidb_opt_index_join_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_index_join_cost_factor-new-in-v853-and-v900), [`tidb_opt_index_lookup_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_index_lookup_cost_factor-new-in-v853-and-v900), [`tidb_opt_index_merge_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_index_merge_cost_factor-new-in-v853-and-v900), [`tidb_opt_index_reader_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_index_reader_cost_factor-new-in-v853-and-v900), [`tidb_opt_index_scan_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_index_scan_cost_factor-new-in-v853-and-v900), [`tidb_opt_limit_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_limit_cost_factor-new-in-v853-and-v900), [`tidb_opt_merge_join_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_merge_join_cost_factor-new-in-v853-and-v900), [`tidb_opt_sort_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_sort_cost_factor-new-in-v853-and-v900), [`tidb_opt_stream_agg_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_stream_agg_cost_factor-new-in-v853-and-v900), [`tidb_opt_table_full_scan_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_table_full_scan_cost_factor-new-in-v853-and-v900), [`tidb_opt_table_range_scan_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_table_range_scan_cost_factor-new-in-v853-and-v900), [`tidb_opt_table_reader_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_table_reader_cost_factor-new-in-v853-and-v900), [`tidb_opt_table_rowid_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_table_rowid_cost_factor-new-in-v853-and-v900), [`tidb_opt_table_tiflash_scan_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_table_tiflash_scan_cost_factor-new-in-v853-and-v900), and [`tidb_opt_topn_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_topn_cost_factor-new-in-v853-and-v900) [#60357](https://github.com/pingcap/tidb/issues/60357) @[terry1purcell](https://github.com/terry1purcell)
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- Add the following system variables for internal use by the [Cost Model](/cost-model.md). It is **NOT** recommended to modify these variables: [`tidb_opt_hash_agg_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_hash_agg_cost_factor-new-in-v853), [`tidb_opt_hash_join_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_hash_join_cost_factor-new-in-v853), [`tidb_opt_index_join_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_index_join_cost_factor-new-in-v853), [`tidb_opt_index_lookup_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_index_lookup_cost_factor-new-in-v853), [`tidb_opt_index_merge_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_index_merge_cost_factor-new-in-v853), [`tidb_opt_index_reader_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_index_reader_cost_factor-new-in-v853), [`tidb_opt_index_scan_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_index_scan_cost_factor-new-in-v853), [`tidb_opt_limit_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_limit_cost_factor-new-in-v853), [`tidb_opt_merge_join_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_merge_join_cost_factor-new-in-v853), [`tidb_opt_sort_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_sort_cost_factor-new-in-v853), [`tidb_opt_stream_agg_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_stream_agg_cost_factor-new-in-v853), [`tidb_opt_table_full_scan_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_table_full_scan_cost_factor-new-in-v853), [`tidb_opt_table_range_scan_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_table_range_scan_cost_factor-new-in-v853), [`tidb_opt_table_reader_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_table_reader_cost_factor-new-in-v853), [`tidb_opt_table_rowid_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_table_rowid_cost_factor-new-in-v853), [`tidb_opt_table_tiflash_scan_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_table_tiflash_scan_cost_factor-new-in-v853), and [`tidb_opt_topn_cost_factor`](https://docs.pingcap.com/tidb/v8.5/system-variables/#tidb_opt_topn_cost_factor-new-in-v853) [#60357](https://github.com/pingcap/tidb/issues/60357) @[terry1purcell](https://github.com/terry1purcell)
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- Reintroduce the [telemetry](https://docs.pingcap.com/tidb/v8.5/telemetry) feature. However, it only logs telemetry-related information locally and no longer sends data to PingCAP over the network [#61766](https://github.com/pingcap/tidb/issues/61766) @[Defined2014](https://github.com/Defined2014)
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## Improvements

‎system-variable-reference.md

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- [System Variables](/system-variables.md#tidb_opt_hash_agg_cost_factor-new-in-v853-and-v900)
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- [System Variables](/system-variables.md#tidb_opt_hash_agg_cost_factor-new-in-v853)
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- [TiDB 8.5.3 Release Notes](/releases/release-8.5.3.md)
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- [System Variables](/system-variables.md#tidb_opt_hash_join_cost_factor-new-in-v853)
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- [TiDB 8.5.3 Release Notes](/releases/release-8.5.3.md)
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- [System Variables](/system-variables.md#tidb_opt_index_join_cost_factor-new-in-v853)
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- [TiDB 8.5.3 Release Notes](/releases/release-8.5.3.md)
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- [System Variables](/system-variables.md#tidb_opt_index_lookup_cost_factor-new-in-v853-and-v900)
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- [System Variables](/system-variables.md#tidb_opt_index_lookup_cost_factor-new-in-v853)
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- [TiDB 8.5.3 Release Notes](/releases/release-8.5.3.md)
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- [System Variables](/system-variables.md#tidb_opt_index_merge_cost_factor-new-in-v853-and-v900)
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- [System Variables](/system-variables.md#tidb_opt_index_merge_cost_factor-new-in-v853)
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- [TiDB 8.5.3 Release Notes](/releases/release-8.5.3.md)
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- [System Variables](/system-variables.md#tidb_opt_index_reader_cost_factor-new-in-v853)
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- [TiDB 8.5.3 Release Notes](/releases/release-8.5.3.md)
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- [System Variables](/system-variables.md#tidb_opt_index_scan_cost_factor-new-in-v853-and-v900)
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- [System Variables](/system-variables.md#tidb_opt_index_scan_cost_factor-new-in-v853)
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- [TiDB 8.5.3 Release Notes](/releases/release-8.5.3.md)
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- [System Variables](/system-variables.md#tidb_opt_limit_cost_factor-new-in-v853-and-v900)
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- [System Variables](/system-variables.md#tidb_opt_limit_cost_factor-new-in-v853)
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- [TiDB 8.5.3 Release Notes](/releases/release-8.5.3.md)
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- [System Variables](/system-variables.md#tidb_opt_merge_join_cost_factor-new-in-v853)
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- [TiDB 8.5.3 Release Notes](/releases/release-8.5.3.md)
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- [System Variables](/system-variables.md#tidb_opt_sort_cost_factor-new-in-v853)
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- [TiDB 8.5.3 Release Notes](/releases/release-8.5.3.md)
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- [System Variables](/system-variables.md#tidb_opt_stream_agg_cost_factor-new-in-v853)
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- [System Variables](/system-variables.md#tidb_opt_table_full_scan_cost_factor-new-in-v853)
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- [System Variables](/system-variables.md#tidb_opt_table_reader_cost_factor-new-in-v853)
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@@ -5073,7 +5073,7 @@ SHOW WARNINGS;
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- Range: `[0, 2147483647]`
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- Default value: `1`
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### tidb_opt_table_full_scan_cost_factor <span class="version-mark">New in v8.5.3 and v9.0.0</span>
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### tidb_opt_table_full_scan_cost_factor <span class="version-mark">New in v8.5.3</span>
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> **Warning:**
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>
@@ -5085,7 +5085,7 @@ SHOW WARNINGS;
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- Range: `[0, 2147483647]`
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- Default value: `1`
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### tidb_opt_table_range_scan_cost_factor <span class="version-mark">New in v8.5.3 and v9.0.0</span>
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### tidb_opt_table_range_scan_cost_factor <span class="version-mark">New in v8.5.3</span>
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> **Warning:**
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>
@@ -5097,7 +5097,7 @@ SHOW WARNINGS;
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- Range: `[0, 2147483647]`
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- Default value: `1`
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### tidb_opt_table_reader_cost_factor <span class="version-mark">New in v8.5.3 and v9.0.0</span>
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### tidb_opt_table_reader_cost_factor <span class="version-mark">New in v8.5.3</span>
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> **Warning:**
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>
@@ -5109,7 +5109,7 @@ SHOW WARNINGS;
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- Range: `[0, 2147483647]`
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- Default value: `1`
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### tidb_opt_table_rowid_cost_factor <span class="version-mark">New in v8.5.3 and v9.0.0</span>
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### tidb_opt_table_rowid_cost_factor <span class="version-mark">New in v8.5.3</span>
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> **Warning:**
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>
@@ -5121,7 +5121,7 @@ SHOW WARNINGS;
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- Range: `[0, 2147483647]`
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- Default value: `1`
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### tidb_opt_table_tiflash_scan_cost_factor <span class="version-mark">New in v8.5.3 and v9.0.0</span>
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### tidb_opt_table_tiflash_scan_cost_factor <span class="version-mark">New in v8.5.3</span>
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> **Warning:**
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>
@@ -5133,7 +5133,7 @@ SHOW WARNINGS;
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- Range: `[0, 2147483647]`
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- Default value: `1`
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### tidb_opt_topn_cost_factor <span class="version-mark">New in v8.5.3 and v9.0.0</span>
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### tidb_opt_topn_cost_factor <span class="version-mark">New in v8.5.3</span>
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> **Warning:**
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>

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