10.14 Examining Server Thread (Process) Information.md

Author: zhangyijun402

10.14 Examining Server Thread (Process) Information.md

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+原文地址：https://dev.mysql.com/doc/refman/8.0/en/thread-information.html
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+## 10.14 Examining Server Thread (Process) Information
+
+- [10.14.1 Accessing the Process List](https://dev.mysql.com/doc/refman/8.0/en/processlist-access.html)
+- [10.14.2 Thread Command Values](https://dev.mysql.com/doc/refman/8.0/en/thread-commands.html)
+- [10.14.3 General Thread States](https://dev.mysql.com/doc/refman/8.0/en/general-thread-states.html)
+- [10.14.4 Replication Source Thread States](https://dev.mysql.com/doc/refman/8.0/en/source-thread-states.html)
+- [10.14.5 Replication I/O (Receiver) Thread States](https://dev.mysql.com/doc/refman/8.0/en/replica-io-thread-states.html)
+- [10.14.6 Replication SQL Thread States](https://dev.mysql.com/doc/refman/8.0/en/replica-sql-thread-states.html)
+- [10.14.7 Replication Connection Thread States](https://dev.mysql.com/doc/refman/8.0/en/replica-connection-thread-states.html)
+- [10.14.8 NDB Cluster Thread States](https://dev.mysql.com/doc/refman/8.0/en/mysql-cluster-thread-states.html)
+- [10.14.9 Event Scheduler Thread States](https://dev.mysql.com/doc/refman/8.0/en/event-scheduler-thread-states.html)
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+
+
+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:
+
+```sql
+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`](https://dev.mysql.com/doc/refman/8.0/en/kill.html) statement. See [Section 15.7.8.4, “KILL Statement”](https://dev.mysql.com/doc/refman/8.0/en/kill.html).