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:

IDThe client's process ID.
USERThe username associated with the process.
HOSTThe host the client is connected to.
DBThe default database of the process (NULL if no default).
COMMANDThe command type. See Thread Command Values.
TIMEThe amount of time, in seconds, the process has been in its current state. For a replica SQL thread before MariaDB 10.1, this is the time in seconds between the last replicated event's timestamp and the replica machine's real time.
STATESee Thread States.
INFOThe statement being executed.
PROGRESSThe total progress of the process (0-100%) (see Progress Reporting).

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:

TIME_MSThe amount of time, in milliseconds, the process has been in its current state.
STAGEThe stage the process is currently in.
MAX_STAGEThe maximum number of stages.
PROGRESSThe progress of the process within the current stage (0-100%).
MEMORY_USEDThe amount of memory used by the process.
EXAMINED_ROWSThe number of rows the process has examined.

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.

Threads can be killed using their thread_id, or, since MariaDB 10.0.5, their query_id, with the KILL statement.

Since queries on this table are locking, if the performance_schema is enabled, you may want to query the THREADS table instead.


| 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 |


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