SHOW PROCESSLIST
Syntax
SHOW [FULL] PROCESSLIST
Description
SHOW PROCESSLIST
shows you which threads are running. You
can also get this information from the
INFORMATION_SCHEMA.PROCESSLIST table or the mysqladmin processlist command. If you have the
PROCESS privilege
, you can see all threads.
Otherwise, you can see only your own threads (that is, threads associated with
the MariaDB account that you are using). If you do not use the
FULL
keyword, only the first 100 characters of each
statement are shown in the Info field.
The columns shown in SHOW PROCESSLIST;
are:
Name | Description | Introduced |
---|---|---|
ID | The client's process ID. | |
USER | The username associated with the process. | |
HOST | The host the client is connected to. | |
DB | The default database of the process (NULL if no default). | |
COMMAND | The command type. | |
TIME | The amount of time, in seconds, the process has been in its current state. | |
STATE | The state of the server. | |
INFO | The statement being executed. | |
PROGRESS | The total progress of the process (0-100%) (see Progress Reporting). | MariaDB 5.3 |
See TIME_MS column in INFORMATION_SCHEMA.PROCESSLIST for differences in the TIME
column between MariaDB and MySQL.
The INFORMATION_SCHEMA.PROCESSLIST table contains the following additional columns:
Name | Description | Introduced |
---|---|---|
TIME_MS | The amount of time, in milliseconds, the process has been in its current state. | MariaDB 5.1 |
STAGE | The stage the process is currently in. | MariaDB 5.3 |
MAX_STAGE | The maximum number of stages. | MariaDB 5.3 |
PROGRESS | The progress of the process within the current stage (0-100%). | MariaDB 5.3 |
MEMORY_USED | The amount of memory used by the process. | MariaDB 10.0.1 |
EXAMINED_ROWS | The number of rows the process has examined. | MariaDB 10.0.1 |
QUERY_ID | Query ID. | MariaDB 10.0.5 |
Note that the PROGRESS
field from the information schema, and the PROGRESS
field from SHOW PROCESSLIST
display different results. SHOW PROCESSLIST
shows the total progress, while the information schema shows the progress for the current stage only.
Examples
From MariaDB 5.1.x
SHOW FULL PROCESSLIST; +---------+-------+-----------+------+---------+------+-------+-----------------------+ | Id | User | Host | db | Command | Time | State | Info | +---------+-------+-----------+------+---------+------+-------+-----------------------+ | 1988880 | dbart | localhost | NULL | Query | 0 | NULL | SHOW FULL PROCESSLIST | +---------+-------+-----------+------+---------+------+-------+-----------------------+ SELECT * FROM information_schema.processlist; +---------+-------+-----------+------+---------+------+-----------+----------------------------------------------+---------+ | ID | USER | HOST | DB | COMMAND | TIME | STATE | INFO | TIME_MS | +---------+-------+-----------+------+---------+------+-----------+----------------------------------------------+---------+ | 1988880 | dbart | localhost | NULL | Query | 0 | executing | SELECT * FROM information_schema.processlist | 0.444 | +---------+-------+-----------+------+---------+------+-----------+----------------------------------------------+---------+
From MariaDB 5.5.x
SHOW FULL PROCESSLIST; +-----+------+-----------+------+---------+------+-------+-----------------------+----------+ | Id | User | Host | db | Command | Time | State | Info | Progress | +-----+------+-----------+------+---------+------+-------+-----------------------+----------+ | 126 | root | localhost | NULL | Query | 0 | NULL | SHOW FULL PROCESSLIST | 0.000 | +-----+------+-----------+------+---------+------+-------+-----------------------+----------+ SELECT * FROM information_schema.processlist; +-----+--------+-----------+------+---------+------+-----------+----------------------------------------------+---------+-------+-----------+----------+ | ID | USER | HOST | DB | COMMAND | TIME | STATE | INFO | TIME_MS | STAGE | MAX_STAGE | PROGRESS | +-----+--------+-----------+------+---------+------+-----------+----------------------------------------------+---------+-------+-----------+----------+ | 126 | root | localhost | NULL | Query | 0 | executing | SELECT * FROM information_schema.processlist | 344.718 | 0 | 0 | 0.000 | +-----+--------+-----------+------+---------+------+-----------+----------------------------------------------+---------+-------+-----------+----------+
From MariaDB 10.0.x
MariaDB [(none)]> SHOW PROCESSLIST; +----+-----------------+-----------+------+---------+------+------------------------+------------------+----------+ | Id | User | Host | db | Command | Time | State | Info | Progress | +----+-----------------+-----------+------+---------+------+------------------------+------------------+----------+ | 2 | event_scheduler | localhost | NULL | Daemon | 2693 | Waiting on empty queue | NULL | 0.000 | | 4 | root | localhost | NULL | Query | 0 | Table lock | SHOW PROCESSLIST | 0.000 | +----+-----------------+-----------+------+---------+------+------------------------+------------------+----------+ 2 rows in set (0.00 sec)