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Update tiflash system tables #20253

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Update tiflash system tables
JaySon-Huang Apr 23, 2025
f4f988b
Update information-schema/information-schema-tiflash-indexes.md
JaySon-Huang Apr 24, 2025
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55 changes: 55 additions & 0 deletions information-schema/information-schema-tiflash-indexes.md
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@@ -0,0 +1,55 @@
---
title: TIFLASH_INDEXES
summary: 了解 information_schema 表 `TIFLASH_INDEXES`。
---

# TIFLASH_TABLES

> **警告：**
>
> 请不要在生产环境中使用该系统表，因为该表字段信息尚未固定下来，可能会在 TiDB 未来版本中发生变化。

`TIFLASH_INDEXES` 表提供有关 TiFlash 副本上索引构建的的统计信息。

```sql
USE information_schema;
DESC tiflash_indexes;
```

```sql
+-------------------------+---------------+------+------+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------------------------+---------------+------+------+---------+-------+
| TIDB_DATABASE | varchar(64) | YES | | NULL | |
| TIDB_TABLE | varchar(64) | YES | | NULL | |
| TABLE_ID | bigint | YES | | NULL | |
| COLUMN_NAME | varchar(64) | YES | | NULL | |
| INDEX_NAME | varchar(64) | YES | | NULL | |
| COLUMN_ID | bigint | YES | | NULL | |
| INDEX_ID | bigint | YES | | NULL | |
| INDEX_KIND | varchar(64) | YES | | NULL | |
| ROWS_STABLE_INDEXED | bigint | YES | | NULL | |
| ROWS_STABLE_NOT_INDEXED | bigint | YES | | NULL | |
| ROWS_DELTA_INDEXED | bigint | YES | | NULL | |
| ROWS_DELTA_NOT_INDEXED | bigint | YES | | NULL | |
| ERROR_MESSAGE | varchar(1024) | YES | | NULL | |
| TIFLASH_INSTANCE | varchar(64) | YES | | NULL | |
+-------------------------+---------------+------+------+---------+-------+
```

`TIFLASH_INDEXES` 表中各列的字段含义如下：

- `TIDB_DATABASE`：表所属的数据库的名称。
- `TIDB_TABLE`：表的名称。
- `TABLE_ID`：表的内部 ID，该 ID 在一个 TiDB 集群内部唯一。
- `COLUMN_NAME`：索引所在的列名
- `INDEX_NAME`：索引的名称
- `COLUMN_ID`：索引所在的列 ID
- `INDEX_ID`：索引的 ID
- `INDEX_KIND`：索引的类型
- `ROWS_STABLE_INDEXED`：TiFlash 副本中 Stable 层已经构建完索引的行数
- `ROWS_STABLE_NOT_INDEXED`：TiFlash 副本中 Stable 层未构建索引的行数
- `ROWS_DELTA_INDEXED`：TiFlash 副本中 Delta 层已经构建完索引的行数
- `ROWS_DELTA_NOT_INDEXED`：TiFlash 副本中 Delta 层未构建索引的行数
- `ERROR_MESSAGE`：索引构建过程中遇到不可恢复的错误信息
- `TIFLASH_INSTANCE`：TiFlash 实例地址。
59 changes: 27 additions & 32 deletions information-schema/information-schema-tiflash-segments.md
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Expand Up @@ -9,7 +9,7 @@ summary: 了解 information_schema 表 `TIFLASH_SEGMENTS`。
>
> 请不要在生产环境中使用该系统表，因为该表字段信息尚未固定下来，可能会在 TiDB 未来版本中发生变化。

`TIFLASH_SEGMENTS` 表提供了 TiFlash 内部数据表的统计信息。
`TIFLASH_SEGMENTS` 表提供了 TiFlash 内部数据表内分片(Segment)的统计信息。

```sql
USE information_schema;
Expand All @@ -20,47 +20,42 @@ DESC tiflash_segments;
+-------------------------------+-------------+------+------+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------------------------------+-------------+------+------+---------+-------+
| DATABASE | varchar(64) | YES | | NULL | |
| TABLE | varchar(64) | YES | | NULL | |
| TIDB_DATABASE | varchar(64) | YES | | NULL | |
| TIDB_TABLE | varchar(64) | YES | | NULL | |
| TABLE_ID | bigint(64) | YES | | NULL | |
| IS_TOMBSTONE | bigint(64) | YES | | NULL | |
| SEGMENT_ID | bigint(64) | YES | | NULL | |
| TABLE_ID | bigint | YES | | NULL | |
| IS_TOMBSTONE | bigint | YES | | NULL | |
| SEGMENT_ID | bigint | YES | | NULL | |
| RANGE | varchar(64) | YES | | NULL | |
| EPOCH | bigint(64) | YES | | NULL | |
| ROWS | bigint(64) | YES | | NULL | |
| SIZE | bigint(64) | YES | | NULL | |
| EPOCH | bigint | YES | | NULL | |
| ROWS | bigint | YES | | NULL | |
| SIZE | bigint | YES | | NULL | |
| DELTA_RATE | double | YES | | NULL | |
| DELTA_MEMTABLE_ROWS | bigint(64) | YES | | NULL | |
| DELTA_MEMTABLE_SIZE | bigint(64) | YES | | NULL | |
| DELTA_MEMTABLE_COLUMN_FILES | bigint(64) | YES | | NULL | |
| DELTA_MEMTABLE_DELETE_RANGES | bigint(64) | YES | | NULL | |
| DELTA_PERSISTED_PAGE_ID | bigint(64) | YES | | NULL | |
| DELTA_PERSISTED_ROWS | bigint(64) | YES | | NULL | |
| DELTA_PERSISTED_SIZE | bigint(64) | YES | | NULL | |
| DELTA_PERSISTED_COLUMN_FILES | bigint(64) | YES | | NULL | |
| DELTA_PERSISTED_DELETE_RANGES | bigint(64) | YES | | NULL | |
| DELTA_CACHE_SIZE | bigint(64) | YES | | NULL | |
| DELTA_INDEX_SIZE | bigint(64) | YES | | NULL | |
| STABLE_PAGE_ID | bigint(64) | YES | | NULL | |
| STABLE_ROWS | bigint(64) | YES | | NULL | |
| STABLE_SIZE | bigint(64) | YES | | NULL | |
| STABLE_DMFILES | bigint(64) | YES | | NULL | |
| STABLE_DMFILES_ID_0 | bigint(64) | YES | | NULL | |
| STABLE_DMFILES_ROWS | bigint(64) | YES | | NULL | |
| STABLE_DMFILES_SIZE | bigint(64) | YES | | NULL | |
| STABLE_DMFILES_SIZE_ON_DISK | bigint(64) | YES | | NULL | |
| STABLE_DMFILES_PACKS | bigint(64) | YES | | NULL | |
| DELTA_MEMTABLE_ROWS | bigint | YES | | NULL | |
| DELTA_MEMTABLE_SIZE | bigint | YES | | NULL | |
| DELTA_MEMTABLE_COLUMN_FILES | bigint | YES | | NULL | |
| DELTA_MEMTABLE_DELETE_RANGES | bigint | YES | | NULL | |
| DELTA_PERSISTED_PAGE_ID | bigint | YES | | NULL | |
| DELTA_PERSISTED_ROWS | bigint | YES | | NULL | |
| DELTA_PERSISTED_SIZE | bigint | YES | | NULL | |
| DELTA_PERSISTED_COLUMN_FILES | bigint | YES | | NULL | |
| DELTA_PERSISTED_DELETE_RANGES | bigint | YES | | NULL | |
| DELTA_CACHE_SIZE | bigint | YES | | NULL | |
| DELTA_INDEX_SIZE | bigint | YES | | NULL | |
| STABLE_PAGE_ID | bigint | YES | | NULL | |
| STABLE_ROWS | bigint | YES | | NULL | |
| STABLE_SIZE | bigint | YES | | NULL | |
| STABLE_DMFILES | bigint | YES | | NULL | |
| STABLE_DMFILES_ID_0 | bigint | YES | | NULL | |
| STABLE_DMFILES_ROWS | bigint | YES | | NULL | |
| STABLE_DMFILES_SIZE | bigint | YES | | NULL | |
| STABLE_DMFILES_SIZE_ON_DISK | bigint | YES | | NULL | |
| STABLE_DMFILES_PACKS | bigint | YES | | NULL | |
| TIFLASH_INSTANCE | varchar(64) | YES | | NULL | |
+-------------------------------+-------------+------+------+---------+-------+
33 rows in set (0.00 sec)
```

`TIFLASH_SEGMENTS` 表中各列的字段含义如下：

- `DATABASE`：Segment 所属表在 TiFlash 内部所属的数据库的名称。
- `TABLE`：Segment 所属表在 TiFlash 内部的名称。
- `TIDB_DATABASE`：Segment 所属表所属的数据库的名称。
- `TIDB_TABLE`：Segment 所属表的名称。
- `TABLE_ID`：Segment 所属表的内部 ID，该 ID 在一个 TiDB 集群内部唯一。
Expand Down
55 changes: 25 additions & 30 deletions information-schema/information-schema-tiflash-tables.md
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Original file line number Diff line number Diff line change
Expand Up @@ -20,68 +20,63 @@ DESC tiflash_tables;
+-------------------------------------------+--------------+------+------+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------------------------------------------+--------------+------+------+---------+-------+
| DATABASE | varchar(64) | YES | | NULL | |
| TABLE | varchar(64) | YES | | NULL | |
| TIDB_DATABASE | varchar(64) | YES | | NULL | |
| TIDB_TABLE | varchar(64) | YES | | NULL | |
| TABLE_ID | bigint(64) | YES | | NULL | |
| IS_TOMBSTONE | bigint(64) | YES | | NULL | |
| SEGMENT_COUNT | bigint(64) | YES | | NULL | |
| TOTAL_ROWS | bigint(64) | YES | | NULL | |
| TOTAL_SIZE | bigint(64) | YES | | NULL | |
| TOTAL_DELETE_RANGES | bigint(64) | YES | | NULL | |
| TABLE_ID | bigint | YES | | NULL | |
| IS_TOMBSTONE | bigint | YES | | NULL | |
| SEGMENT_COUNT | bigint | YES | | NULL | |
| TOTAL_ROWS | bigint | YES | | NULL | |
| TOTAL_SIZE | bigint | YES | | NULL | |
| TOTAL_DELETE_RANGES | bigint | YES | | NULL | |
| DELTA_RATE_ROWS | double | YES | | NULL | |
| DELTA_RATE_SEGMENTS | double | YES | | NULL | |
| DELTA_PLACED_RATE | double | YES | | NULL | |
| DELTA_CACHE_SIZE | bigint(64) | YES | | NULL | |
| DELTA_CACHE_SIZE | bigint | YES | | NULL | |
| DELTA_CACHE_RATE | double | YES | | NULL | |
| DELTA_CACHE_WASTED_RATE | double | YES | | NULL | |
| DELTA_INDEX_SIZE | bigint(64) | YES | | NULL | |
| DELTA_INDEX_SIZE | bigint | YES | | NULL | |
| AVG_SEGMENT_ROWS | double | YES | | NULL | |
| AVG_SEGMENT_SIZE | double | YES | | NULL | |
| DELTA_COUNT | bigint(64) | YES | | NULL | |
| TOTAL_DELTA_ROWS | bigint(64) | YES | | NULL | |
| TOTAL_DELTA_SIZE | bigint(64) | YES | | NULL | |
| DELTA_COUNT | bigint | YES | | NULL | |
| TOTAL_DELTA_ROWS | bigint | YES | | NULL | |
| TOTAL_DELTA_SIZE | bigint | YES | | NULL | |
| AVG_DELTA_ROWS | double | YES | | NULL | |
| AVG_DELTA_SIZE | double | YES | | NULL | |
| AVG_DELTA_DELETE_RANGES | double | YES | | NULL | |
| STABLE_COUNT | bigint(64) | YES | | NULL | |
| TOTAL_STABLE_ROWS | bigint(64) | YES | | NULL | |
| TOTAL_STABLE_SIZE | bigint(64) | YES | | NULL | |
| TOTAL_STABLE_SIZE_ON_DISK | bigint(64) | YES | | NULL | |
| STABLE_COUNT | bigint | YES | | NULL | |
| TOTAL_STABLE_ROWS | bigint | YES | | NULL | |
| TOTAL_STABLE_SIZE | bigint | YES | | NULL | |
| TOTAL_STABLE_SIZE_ON_DISK | bigint | YES | | NULL | |
| AVG_STABLE_ROWS | double | YES | | NULL | |
| AVG_STABLE_SIZE | double | YES | | NULL | |
| TOTAL_PACK_COUNT_IN_DELTA | bigint(64) | YES | | NULL | |
| MAX_PACK_COUNT_IN_DELTA | bigint(64) | YES | | NULL | |
| TOTAL_PACK_COUNT_IN_DELTA | bigint | YES | | NULL | |
| MAX_PACK_COUNT_IN_DELTA | bigint | YES | | NULL | |
| AVG_PACK_COUNT_IN_DELTA | double | YES | | NULL | |
| AVG_PACK_ROWS_IN_DELTA | double | YES | | NULL | |
| AVG_PACK_SIZE_IN_DELTA | double | YES | | NULL | |
| TOTAL_PACK_COUNT_IN_STABLE | bigint(64) | YES | | NULL | |
| TOTAL_PACK_COUNT_IN_STABLE | bigint | YES | | NULL | |
| AVG_PACK_COUNT_IN_STABLE | double | YES | | NULL | |
| AVG_PACK_ROWS_IN_STABLE | double | YES | | NULL | |
| AVG_PACK_SIZE_IN_STABLE | double | YES | | NULL | |
| STORAGE_STABLE_NUM_SNAPSHOTS | bigint(64) | YES | | NULL | |
| STORAGE_STABLE_NUM_SNAPSHOTS | bigint | YES | | NULL | |
| STORAGE_STABLE_OLDEST_SNAPSHOT_LIFETIME | double | YES | | NULL | |
| STORAGE_STABLE_OLDEST_SNAPSHOT_THREAD_ID | bigint(64) | YES | | NULL | |
| STORAGE_STABLE_OLDEST_SNAPSHOT_THREAD_ID | bigint | YES | | NULL | |
| STORAGE_STABLE_OLDEST_SNAPSHOT_TRACING_ID | varchar(128) | YES | | NULL | |
| STORAGE_DELTA_NUM_SNAPSHOTS | bigint(64) | YES | | NULL | |
| STORAGE_DELTA_NUM_SNAPSHOTS | bigint | YES | | NULL | |
| STORAGE_DELTA_OLDEST_SNAPSHOT_LIFETIME | double | YES | | NULL | |
| STORAGE_DELTA_OLDEST_SNAPSHOT_THREAD_ID | bigint(64) | YES | | NULL | |
| STORAGE_DELTA_OLDEST_SNAPSHOT_THREAD_ID | bigint | YES | | NULL | |
| STORAGE_DELTA_OLDEST_SNAPSHOT_TRACING_ID | varchar(128) | YES | | NULL | |
| STORAGE_META_NUM_SNAPSHOTS | bigint(64) | YES | | NULL | |
| STORAGE_META_NUM_SNAPSHOTS | bigint | YES | | NULL | |
| STORAGE_META_OLDEST_SNAPSHOT_LIFETIME | double | YES | | NULL | |
| STORAGE_META_OLDEST_SNAPSHOT_THREAD_ID | bigint(64) | YES | | NULL | |
| STORAGE_META_OLDEST_SNAPSHOT_THREAD_ID | bigint | YES | | NULL | |
| STORAGE_META_OLDEST_SNAPSHOT_TRACING_ID | varchar(128) | YES | | NULL | |
| BACKGROUND_TASKS_LENGTH | bigint(64) | YES | | NULL | |
| BACKGROUND_TASKS_LENGTH | bigint | YES | | NULL | |
| TIFLASH_INSTANCE | varchar(64) | YES | | NULL | |
+-------------------------------------------+--------------+------+------+---------+-------+
54 rows in set (0.00 sec)
```

`TIFLASH_TABLES` 表中各列的字段含义如下：

- `DATABASE`：表在 TiFlash 内部所属的数据库的名称。
- `TABLE`：表在 TiFlash 内部的名称。
- `TIDB_DATABASE`：表所属的数据库的名称。
- `TIDB_TABLE`：表的名称。
- `TABLE_ID`：表的内部 ID，该 ID 在一个 TiDB 集群内部唯一。
Expand Down
7 changes: 5 additions & 2 deletions information-schema/information-schema.md
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Original file line number Diff line number Diff line change
Expand Up @@ -96,8 +96,11 @@ Information Schema 提供了一种查看系统元数据的 ANSI 标准方法。
| [`TIDB_INDEXES`](/information-schema/information-schema-tidb-indexes.md) | 提供有关 TiDB 表的索引信息。 |
| [`TIDB_INDEX_USAGE`](/information-schema/information-schema-tidb-index-usage.md) | 提供 TiDB 节点上有关访问索引的统计信息。 ｜
| [`TIDB_SERVERS_INFO`](/information-schema/information-schema-tidb-servers-info.md) | 提供 TiDB 服务器的列表 |
| [`TIDB_TRX`](/information-schema/information-schema-tidb-trx.md) | 提供 TiDB 节点上正在执行的事务的信息。 |
| [`TIDB_TRX`](/information-schema/information-schema-tidb-trx.md) | 提供 TiDB 节点上正在执行的事务的信息。 |
| [`TIFLASH_INDEXES`](/information-schema/information-schema-tiflash-indexes.md) | 提供有关 TiFlash 副本上索引构建的的统计信息。 |
| [`TIFLASH_REPLICA`](/information-schema/information-schema-tiflash-replica.md) | 提供有关 TiFlash 副本的详细信息。 |
| [`TIFLASH_SEGMENTS`](/information-schema/information-schema-tiflash-segments.md) | 提供有关 TiFlash 内部数据表内分片(Segment)的统计信息。 |
| [`TIFLASH_TABLES`](/information-schema/information-schema-tiflash-tables.md) | 提供有关 TiFlash 内部数据表的统计信息。 |
| [`TIKV_REGION_PEERS`](/information-schema/information-schema-tikv-region-peers.md) | 提供 Region 存储位置的详细信息。 |
| [`TIKV_REGION_STATUS`](/information-schema/information-schema-tikv-region-status.md) | 提供 Region 的统计信息。 |
| [`TIKV_REGION_STATUS`](/information-schema/information-schema-tikv-region-status.md) | 提供 Region 的统计信息。 |
| [`TIKV_STORE_STATUS`](/information-schema/information-schema-tikv-store-status.md) | 提供 TiKV 服务器的基本信息。 |