15.7.7.37 SHOW STATUS Statement

SHOW [GLOBAL | SESSION] STATUS
    [LIKE 'pattern' | WHERE expr]

SHOW STATUS provides server status information (see Section 7.1.10, “Server Status Variables”). This statement does not require any privilege. It requires only the ability to connect to the server.

Status variable information is also available from these sources:

• Performance Schema tables. See Section 29.12.15, “Performance Schema Status Variable Tables”.

• The mysqladmin extended-status command. See Section 6.5.2, “mysqladmin — A MySQL Server Administration Program”.

For SHOW STATUS, a LIKE clause, if present, indicates which variable names to match. A WHERE clause can be given to select rows using more general conditions, as discussed in Section 28.8, “Extensions to SHOW Statements”.

SHOW STATUS accepts an optional GLOBAL or SESSION variable scope modifier:

• With a GLOBAL modifier, the statement displays the global status values. A global status variable may represent status for some aspect of the server itself (for example, Aborted_connects), or the aggregated status over all connections to MySQL (for example, Bytes_received and Bytes_sent). If a variable has no global value, the session value is displayed.

• With a SESSION modifier, the statement displays the status variable values for the current connection. If a variable has no session value, the global value is displayed. LOCAL is a synonym for SESSION.

• If no modifier is present, the default is SESSION.

The scope for each status variable is listed at Section 7.1.10, “Server Status Variables”.

Each invocation of the SHOW STATUS statement uses an internal temporary table and increments the global Created_tmp_tables value.

Partial output is shown here. The list of names and values may differ for your server. The meaning of each variable is given in Section 7.1.10, “Server Status Variables”.

mysql> SHOW STATUS;
+--------------------------+------------+
| Variable_name            | Value      |
+--------------------------+------------+
| Aborted_clients          | 0          |
| Aborted_connects         | 0          |
| Bytes_received           | 155372598  |
| Bytes_sent               | 1176560426 |
| Connections              | 30023      |
| Created_tmp_disk_tables  | 0          |
| Created_tmp_tables       | 8340       |
| Created_tmp_files        | 60         |
...
| Open_tables              | 1          |
| Open_files               | 2          |
| Open_streams             | 0          |
| Opened_tables            | 44600      |
| Questions                | 2026873    |
...
| Table_locks_immediate    | 1920382    |
| Table_locks_waited       | 0          |
| Threads_cached           | 0          |
| Threads_created          | 30022      |
| Threads_connected        | 1          |
| Threads_running          | 1          |
| Uptime                   | 80380      |
+--------------------------+------------+

With a LIKE clause, the statement displays only rows for those variables with names that match the pattern:

mysql> SHOW STATUS LIKE 'Key%';
+--------------------+----------+
| Variable_name      | Value    |
+--------------------+----------+
| Key_blocks_used    | 14955    |
| Key_read_requests  | 96854827 |
| Key_reads          | 162040   |
| Key_write_requests | 7589728  |
| Key_writes         | 3813196  |
+--------------------+----------+