MySQL Operation command Grooming (5)-Execute SQL statement query i.e. MySQL status description

In the daily MySQL operations, it is often to query the current MySQL executing SQL statements and other running MySQL-related threads, which is used in the MySQL processlist command.
Mysql> show processlist; //Query the SQL statement being executed
Mysql> Show full processlist; //Query the full SQL statement being executed
Mysql> Kill connection ID //Stop processlist query out of a thread, ID is the corresponding ID number
Mysql> show Processlist;

+------+-------+---------------------+--------+-------------+------+------------------------------------------- ----------------------------+------------------+| Id | User | Host | db | Command | Time | State | Info |+------+-------+---------------------+--------+-------------+------+------------------------------------ -----------------------------------+------------------+| 1574 | Root | localhost | HUANPC |  Sleep |                                                                       702 | | NULL | | 1955 | Root | localhost | NULL |    Query | 0 | init | Show Processlist | | 1958 | Slave | 192.168.1.102:37399 | NULL |   Binlog Dump | 10 | Master has sent all binlog to slave; Waiting for Binlog to be updated | NULL |+------+-------+---------------------+--------+-------------+------+-----------------------------------------------------------------------+----------------- -+3 rows in Set (0.00 sec) mysql> Kill connection 1574; Query OK, 0 rows Affected (0.00 sec) mysql> Show processlist;+------+-------+---------------------+------+---------- ---+------+-----------------------------------------------------------------------+------------------+| Id | User | Host | db | Command | Time | State | Info |+------+-------+---------------------+------+-------------+------+-------------------------------------- ---------------------------------+------------------+| 1955 | Root | localhost | NULL |    Query | 0 | init | Show Processlist | | 1958 | Slave | 192.168.1.102:37399 | NULL |   Binlog Dump | 18 | Master has sent all binlog to slave; Waiting for Binlog to be updated | NULL |+------+-------+---------------------+------+-------------+------+---------------------------------------- -------------------------------+------------------+2 rows in Set (0.00 sec)

In addition to this,show processlist can also view the current number of MySQL connections.
If it is the root account, you can see the current connection for all users.
If you are a normal account, you can only see the connection you are occupying.
Attention:
Show processlist; list only the first 100 articles
To use show full processlist if you want to list them all;

Use Show status to view MySQL status in a more comprehensive way
Mysql> Show status;

Parameter explanation:
Aborted_clients the number of connections that have been discarded because the client did not properly close the connection already dead.
Aborted_connects the number of times the connection to the MySQL server has failed.
Connections the number of attempts to connect to the MySQL server.
Created_tmp_tables the number of suppressed temporary tables that have been created when the statement is executed.
Delayed_insert_threads the number of deferred plug-in processor threads being used.
Delayed_writes the number of rows written with the insert Delayed.
Delayed_errors the number of rows written with insert Delayed for some errors (possibly repeating key values).
Flush_commands the number of times the flush command was executed.
Handler_delete the number of times a row was requested to be deleted from a table.
The number of times the Handler_read_first request reads the first row in the table.
The Handler_read_key requests a number based on the key read line.
The number of times a handler_read_next request reads into a row based on one key.
The number of times a HANDLER_READ_RND request reads into a row based on a fixed position.
Handler_update the number of times a row in the table was requested to be updated.
The number of times the Handler_write request inserts a row into the table.
key_blocks_used the number of blocks used for the keyword cache.
Key_read_requests the number of times a key value was requested to be read from the cache.
Key_reads the number of times a key value has been physically read from disk.
Key_write_requests requests a keyword block to be written to the cache count.
Key_writes the number of times a key-value block is physically written to disk.
Max_used_connections the maximum number of connections that are used at the same time.
Not_flushed_key_blocks a key block that has been changed in the key cache but has not been emptied to disk.
Not_flushed_delayed_rows the number of rows waiting to be written in the Insert delay queue.
Open_tables the number of open tables.
Open_files the number of open files.
Open_streams Number of open streams (primarily for log records)
Opened_tables the number of tables that have been opened.
Questions the number of queries destined for the server.
Slow_queries the number of queries that will take more than long_query_time time.
threads_connected the number of connections currently open.
Threads_running the number of threads that are not sleeping.
Uptime How many seconds the server has worked.

MySQL Operation command Grooming (5)-Execute SQL statement query i.e. MySQL status description