Details
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Bug
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Status: Closed (View Workflow)
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Critical
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Resolution: Fixed
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10.3.7, 10.4.2, 10.1.37, 10.2.21
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None
Description
As per the manual,
Slow_queries
Description: Number of queries which took longer than long_query_time to run. The slow query log does not need to be active for this to be recorded.
https://mariadb.com/kb/en/library/server-status-variables/#slow_queries
But in real scenario, we have to active slow query log otherwise, it will not be recoded.
MariaDB [test]> select @@long_query_time, @@slow_query_log;
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+-------------------+------------------+
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| @@long_query_time | @@slow_query_log |
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+-------------------+------------------+
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| 10.000000 | 0 |
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+-------------------+------------------+
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1 row in set (0.029 sec)
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|
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MariaDB [test]> show global status like 'slow_queries';
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+---------------+-------+
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| Variable_name | Value |
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+---------------+-------+
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| Slow_queries | 0 |
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+---------------+-------+
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1 row in set (0.005 sec)
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|
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MariaDB [test]> set global long_query_time=0.1;
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Query OK, 0 rows affected (0.027 sec)
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|
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MariaDB [test]> \r
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Connection id: 10
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Current database: test
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|
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MariaDB [test]> select sleep(1) from mysql.user limit 2;
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+----------+
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| sleep(1) |
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+----------+
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| 0 |
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| 0 |
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+----------+
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2 rows in set (2.079 sec)
|
|
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MariaDB [test]> show global status like 'slow_queries';
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+---------------+-------+
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| Variable_name | Value |
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+---------------+-------+
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| Slow_queries | 0 |
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+---------------+-------+
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1 row in set (0.005 sec)
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|
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MariaDB [test]> set global slow_query_log=ON;
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Query OK, 0 rows affected (0.038 sec)
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MariaDB [test]> \r
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Connection id: 11
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Current database: test
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MariaDB [test]> select @@long_query_time, @@slow_query_log;
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+-------------------+------------------+
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| @@long_query_time | @@slow_query_log |
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+-------------------+------------------+
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| 0.100000 | 1 |
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+-------------------+------------------+
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1 row in set (0.001 sec)
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|
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MariaDB [test]> select sleep(1) from mysql.user limit 2;
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+----------+
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| sleep(1) |
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+----------+
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| 0 |
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| 0 |
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+----------+
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2 rows in set (1.996 sec)
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|
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MariaDB [test]> show global status like 'slow_queries';
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+---------------+-------+
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| Variable_name | Value |
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+---------------+-------+
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| Slow_queries | 1 |
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+---------------+-------+
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1 row in set (0.005 sec)
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Attachments
Issue Links
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