SHOW ANALYZE STATUS
The SHOW ANALYZE STATUS statement shows the statistics collection tasks being executed by TiDB and a limited number of historical task records.
Starting from TiDB v6.1.0, the SHOW ANALYZE STATUS statement supports showing cluster-level tasks. Even after a TiDB restart, you can still view task records before the restart using this statement. Before TiDB v6.1.0, the SHOW ANALYZE STATUS statement can only show instance-level tasks, and task records are cleared after a TiDB restart.
Starting from TiDB v6.1.0, you can view the history tasks within the last 7 days through the system table mysql.analyze_jobs.
Synopsis
- ShowAnalyzeStatusStmt
- ShowLikeOrWhereOpt
ShowAnalyzeStatusStmt ::= 'SHOW' 'ANALYZE' 'STATUS' ShowLikeOrWhereOpt
ShowLikeOrWhereOpt ::= 'LIKE' SimpleExpr | 'WHERE' Expression
Examples
mysql> create table t(x int, index idx(x)) partition by hash(x) partitions 2;
Query OK, 0 rows affected (0.69 sec)
mysql> set @@tidb_analyze_version = 1;
Query OK, 0 rows affected (0.00 sec)
mysql> analyze table t;
Query OK, 0 rows affected (0.20 sec)
mysql> show analyze status;
+--------------+------------+----------------+-------------------+----------------+---------------------+---------------------+----------+-------------+----------------+------------+
| Table_schema | Table_name | Partition_name | Job_info | Processed_rows | Start_time | End_time | State | Fail_reason | Instance | Process_ID |
+--------------+------------+----------------+-------------------+----------------+---------------------+---------------------+----------+-------------+----------------+------------+
| test | t | p1 | analyze index idx | 0 | 2022-05-27 11:29:46 | 2022-05-27 11:29:46 | finished | NULL | 127.0.0.1:4000 | NULL |
| test | t | p0 | analyze index idx | 0 | 2022-05-27 11:29:46 | 2022-05-27 11:29:46 | finished | NULL | 127.0.0.1:4000 | NULL |
| test | t | p1 | analyze columns | 0 | 2022-05-27 11:29:46 | 2022-05-27 11:29:46 | finished | NULL | 127.0.0.1:4000 | NULL |
| test | t | p0 | analyze columns | 0 | 2022-05-27 11:29:46 | 2022-05-27 11:29:46 | finished | NULL | 127.0.0.1:4000 | NULL |
+--------------+------------+----------------+-------------------+----------------+---------------------+---------------------+----------+-------------+----------------+------------+
4 rows in set (0.01 sec)
mysql> set @@tidb_analyze_version = 2;
Query OK, 0 rows affected (0.00 sec)
mysql> analyze table t;
Query OK, 0 rows affected, 2 warnings (0.03 sec)
mysql> show analyze status;
+--------------+------------+----------------+--------------------------------------------------------------------+----------------+---------------------+---------------------+----------+-------------+----------------+------------+
| Table_schema | Table_name | Partition_name | Job_info | Processed_rows | Start_time | End_time | State | Fail_reason | Instance | Process_ID |
+--------------+------------+----------------+--------------------------------------------------------------------+----------------+---------------------+---------------------+----------+-------------+----------------+------------+
| test | t | p1 | analyze table all columns with 256 buckets, 500 topn, 1 samplerate | 0 | 2022-05-27 11:30:12 | 2022-05-27 11:30:12 | finished | NULL | 127.0.0.1:4000 | NULL |
| test | t | p0 | analyze table all columns with 256 buckets, 500 topn, 1 samplerate | 0 | 2022-05-27 11:30:12 | 2022-05-27 11:30:12 | finished | NULL | 127.0.0.1:4000 | NULL |
| test | t | p1 | analyze index idx | 0 | 2022-05-27 11:29:46 | 2022-05-27 11:29:46 | finished | NULL | 127.0.0.1:4000 | NULL |
| test | t | p0 | analyze index idx | 0 | 2022-05-27 11:29:46 | 2022-05-27 11:29:46 | finished | NULL | 127.0.0.1:4000 | NULL |
| test | t | p1 | analyze columns | 0 | 2022-05-27 11:29:46 | 2022-05-27 11:29:46 | finished | NULL | 127.0.0.1:4000 | NULL |
| test | t | p0 | analyze columns | 0 | 2022-05-27 11:29:46 | 2022-05-27 11:29:46 | finished | NULL | 127.0.0.1:4000 | NULL |
+--------------+------------+----------------+--------------------------------------------------------------------+----------------+---------------------+---------------------+----------+-------------+----------------+------------+
6 rows in set (0.00 sec)
MySQL compatibility
This statement is a TiDB extension to MySQL syntax.