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 mariadb-admin 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 |
|---|---|
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. See Thread Command Values. |
TIME | The 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. |
STATE | See Thread States. |
INFO | The statement being executed. |
TIME_MS | Query statement time. |
STAGE | Stage of the statement execution. |
MAX_STAGE | Last stage of the statement executeion. |
PROGRESS | The total progress of the process (0-100%) (see Progress Reporting). |
MEMORY_USED | Memory used by the statement. |
MAX_MEMORY_USED | Peak value of the memory usage for this statement. |
EXAMINED_ROWS | Rows examined. |
SENT_ROWS | Rows sent to client. |
QUERY_ID | ID of the statement being executed. |
INFO_BINARY | Info in binary charset. |
TID | OS thread ID (when applicable). |
TMP_SPACE_USED | Amount of space used in tmp directory. |
The information_schema.PROCESSLIST table contains a number of additional columns. See TIME_MS column in information_schema.PROCESSLIST for differences in the TIME column between MariaDB and MySQL.
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 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.
Examples
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 | +----+-----------------+-----------+------+---------+------+------------------------+------------------+----------+
