mysql.slow_log Table

The mysql.slow_log table records details of queries that exceed the long_query_time threshold when slow query logging to tables is enabled.

System tables should not normally be edited directly. Use the related SQL statements instead.

The mysql.slow_log table stores the contents of the Slow Query Log if slow logging is active and the output is being written to table (see Writing logs into tables).

It contains the following fields:

Field	Type	Null	Key	Default	Description
start_time	timestamp(6)	NO		CURRENT_TIMESTAMP(6)	Time the query began.
user_host	mediumtext	NO		NULL	User and host combination.
query_time	time(6)	NO		NULL	Total time the query took to execute.
lock_time	time(6)	NO		NULL	Total time the query was locked.
rows_sent	int(11)	NO		NULL	Number of rows sent.
rows_examined	int(11)	NO		NULL	Number of rows examined.
db	varchar(512)	NO		NULL	Default database.
last_insert_id	int(11)	NO		NULL	last_insert_id.
insert_id	int(11)	NO		NULL	Insert id.
server_id	int(10) unsigned	NO		NULL	The server's id.
sql_text	mediumtext	NO		NULL	Full query.
thread_id	bigint(21) unsigned	NO		NULL	Thread id.
rows_affected	int(11)	NO		NULL	Number of rows affected by an UPDATE or DELETE (from MariaDB 10.1.2)

Example

SELECT * FROM mysql.slow_log\G
...
*************************** 2. row ***************************
    start_time: 2014-11-11 07:56:28.721519
     user_host: root[root] @ localhost []
    query_time: 00:00:12.000215
     lock_time: 00:00:00.000000
     rows_sent: 1
 rows_examined: 0
            db: test
last_insert_id: 0
     insert_id: 0
     server_id: 1
      sql_text: SELECT SLEEP(12)
     thread_id: 74
...

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