mysqld 多线程 用pstree -p 显示

http://blog.chinaunix.net/uid-22566367-id-3751084.html

http://blog.csdn.net/fly2nn/article/details/6980236

pstree -p 6762    :mysqld 多线程序,当一个请求来,就建立一个线程 (12244 ,15470) 为MYSQL登陆对应的服务线程,其他线程不变

进程的pid:
[root@localhost ~]# ps -ef | grep mysqld | grep -v "grep" | awk '{print $2}'
6762

查看进程的所有线程
[root@localhost ~]# ps -L 6762
  PID   LWP TTY      STAT   TIME COMMAND
 6762  6762 pts/1    Sl+    0:02 ./mysqld --debug
 6762  6763 pts/1    Sl+    0:00 ./mysqld --debug
 6762  6764 pts/1    Sl+    0:00 ./mysqld --debug
 6762  6765 pts/1    Sl+    0:00 ./mysqld --debug
 6762  6766 pts/1    Sl+    0:00 ./mysqld --debug
 6762  6767 pts/1    Sl+    0:00 ./mysqld --debug
 6762  6768 pts/1    Sl+    0:00 ./mysqld --debug
 6762  6769 pts/1    Sl+    0:00 ./mysqld --debug
 6762  6770 pts/1    Sl+    0:00 ./mysqld --debug
 6762 12244 pts/1    Sl+    0:00 ./mysqld --debug

查看所有子进程:
[root@localhost ~]# pstree -p 6762

mysqld(6762)─┬─{mysqld}(6763)
             ├─{mysqld}(6764)
             ├─{mysqld}(6765)
             ├─{mysqld}(6766)
             ├─{mysqld}(6767)
             ├─{mysqld}(6768)
             ├─{mysqld}(6769)
             ├─{mysqld}(6770)
             ├─{mysqld}(12244)

查看进程的当前状态:
[root@localhost ~]# cat /proc/12244/status
Name:   mysqld
State:  S (sleeping)
Tgid:   6762
Pid:    12244
PPid:   4383


            

原文地址:https://www.cnblogs.com/zengkefu/p/4951422.html