10.14 Examining Server Thread (Process) Information.md

原文地址：https://dev.mysql.com/doc/refman/8.0/en/thread-information.html

10.14 Examining Server Thread (Process) Information

• 10.14.1 Accessing the Process List
• 10.14.2 Thread Command Values
• 10.14.3 General Thread States
• 10.14.4 Replication Source Thread States
• 10.14.5 Replication I/O (Receiver) Thread States
• 10.14.6 Replication SQL Thread States
• 10.14.7 Replication Connection Thread States
• 10.14.8 NDB Cluster Thread States
• 10.14.9 Event Scheduler Thread States

To ascertain what your MySQL server is doing, it can be helpful to examine the process list, which indicates the operations currently being performed by the set of threads executing within the server. For example:

mysql> SHOW PROCESSLIST\G
*************************** 1. row ***************************
     Id: 5
   User: event_scheduler
   Host: localhost
     db: NULL
Command: Daemon
   Time: 2756681
  State: Waiting on empty queue
   Info: NULL
*************************** 2. row ***************************
     Id: 20
   User: me
   Host: localhost:52943
     db: test
Command: Query
   Time: 0
  State: starting
   Info: SHOW PROCESSLIST

Threads can be killed with the KILL statement. See Section 15.7.8.4, “KILL Statement”.