PGXC_STAT_ACTIVITY displays information about the query performed by the current user on all the CNs in the current cluster.Run the following command to view blocked quer
usename text Name of the user logged in to the backend application_name text Name of the application connected to the backend client_addr inet IP address of the client connected to the backend. If this column isnull, either the client is connected via a Unix socket on the server machine o...
Bourne(BASH), Korn, C shell8Command Line▶ To interact with the shell we need a terminal emulator ▶ In Unix-like systems (e.g. Mac) the terminal is usuallyknown as "terminal"▶ Windows does not really provide a terminal; instead itprovides the command prompt9Command Prompt in ...
Everything in Unix is treated as files. This includes devices, directories and sockets — all of these are files. Stat command displays file or filesystem status as explained in this article. File Stat – Display Information About File For example, to find out more information about 101hacks....
vmstat 语法格式 代码语言:javascript 代码运行次数:0 运行 vmstat[options][delay[count 命令行参数,可选 delay:间隔多久统计一次数据,可选 count:统计一次,可选 注意:若只传了 delay,则统计次数是无限次,结束统计后会打印本次所有数据的平均值 小栗子 ...
x COMMAND 命令名/命令行 y WCHAN 若该进程在睡眠,则显示睡眠中的系统函数名 z Flags 任务标志,参考 sched.h 默认情况下仅显示比较重要的 PID、USER、PR、NI、VIRT、RES、SHR、S、%CPU、%MEM、TIME+、COMMAND 列。可以通过下面的快捷键来更改显示内容。
查看CPU相关命令 #限制某个线程的cpu使用率 sudo cpulimit -p pid -l 50 ps -eo %cpu,args | ...
waiting in queue: The statement is in the queue. Empty: The statement is running. state text Backend status. Its value can be: active: The backend is executing a query. idle: The backend is waiting for a new client command. idle in transaction: The backend is in a transaction, but the...
Not very much known is the machstat command in AIX that can be used to display the status of the Power Status Register, and thus can be helpful to identify any issues with either Power or Cooling. # machstat -f 0 0 0 If it returns all zeroes, everything is fine. Anything else ...
mand simply invokes a shell. On Unix systems, the shell is taken from the environment variable SHELL, or defaults to "sh". On MS-DOS and OS/2 systems, the shell is the normal command processor. | <m> shell-command <m> represents any mark letter. Pipes a section of the input file ...