ANALYZE_STATUS
ANALYZE_STATUS 表提供关于正在运行的统计信息采集任务以及有限数量历史任务的信息。
从 TiDB v6.1.0 开始，ANALYZE_STATUS 表支持显示集群级别的任务。即使在 TiDB 重启后，你仍然可以通过此表查看重启前的任务记录。在 TiDB v6.1.0 之前，ANALYZE_STATUS 表只能显示实例级别的任务，任务记录在重启后会被清除。
从 TiDB v6.1.0 开始，你可以通过系统表 mysql.analyze_jobs 查看最近 7 天内的历史任务。
USE information_schema;
DESC analyze_status;
+----------------------+---------------------+------+------+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+----------------------+---------------------+------+------+---------+-------+
| TABLE_SCHEMA | varchar(64) | YES | | NULL | |
| TABLE_NAME | varchar(64) | YES | | NULL | |
| PARTITION_NAME | varchar(64) | YES | | NULL | |
| JOB_INFO | longtext | YES | | NULL | |
| PROCESSED_ROWS | bigint(64) unsigned | YES | | NULL | |
| START_TIME | datetime | YES | | NULL | |
| END_TIME | datetime | YES | | NULL | |
| STATE | varchar(64) | YES | | NULL | |
| FAIL_REASON | longtext | YES | | NULL | |
| INSTANCE | varchar(512) | YES | | NULL | |
| PROCESS_ID | bigint(64) unsigned | YES | | NULL | |
| REMAINING_SECONDS | bigint(64) unsigned | YES | | NULL | |
| PROGRESS | varchar(20) | YES | | NULL | |
| ESTIMATED_TOTAL_ROWS | bigint(64) unsigned | YES | | NULL | |
+----------------------+---------------------+------+------+---------+-------+
14 行结果（0.00 秒）
SELECT * FROM information_schema.analyze_status;
+--------------+------------+----------------+--------------------------------------------------------------------+----------------+---------------------+---------------------+----------+-------------+----------------+------------+----------------------+----------+-----------------------+
| TABLE_SCHEMA | TABLE_NAME | PARTITION_NAME | JOB_INFO | PROCESSED_ROWS | START_TIME | END_TIME | STATE | FAIL_REASON | INSTANCE | PROCESS_ID | REMAINING_SECONDS | PROGRESS | ESTIMATED_TOTAL_ROWS |
+--------------+------------+----------------+--------------------------------------------------------------------+----------------+---------------------+---------------------+----------+-------------+----------------+------------+----------------------+----------+-----------------------+
| 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 | NULL | NULL | 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 | NULL | NULL | 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 | NULL | NULL | 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 | NULL | NULL | 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 | NULL | NULL | 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 | NULL | NULL | NULL |
| test | t | p1 | analyze table all columns with 256 buckets, 500 topn, 1 samplerate | 1000000 | 2022-05-27 11:30:12 | 2022-05-27 11:40:12 | running | NULL | 127.0.0.1:4000 | 690208308 | 600s | 0.25 | 4000000 |
+--------------+------------+----------------+--------------------------------------------------------------------+----------------+---------------------+---------------------+----------+-------------+----------------+------------+----------------------+----------+-----------------------+
6 行结果（0.00 秒）
ANALYZE_STATUS 表中的字段说明如下：
TABLE_SCHEMA：所属数据库的名称。TABLE_NAME：表的名称。PARTITION_NAME：分区表的名称。JOB_INFO：ANALYZE任务的信息。如果分析的是索引，则此信息会包含索引名。当tidb_analyze_version = 2时，此信息还会包括采样率等配置项。PROCESSED_ROWS：已处理的行数。START_TIME：ANALYZE任务的开始时间。END_TIME：ANALYZE任务的结束时间。STATE：ANALYZE任务的执行状态，其值可以是pending、running、finished或failed。FAIL_REASON：任务失败的原因。如果执行成功，值为NULL。INSTANCE：执行任务的 TiDB 实例。PROCESS_ID：执行任务的进程 ID。REMAINING_SECONDS：任务预计剩余时间（秒）。PROGRESS：任务的进度。ESTIMATED_TOTAL_ROWS：任务需要分析的总行数。