Shulou(Shulou.com)06/01 Report--

CentOS how to view the number of threads of a process, many novices are not very clear about this, in order to help you solve this problem, the following editor will explain in detail for you, people with this need can come to learn, I hope you can gain something.

1. Query according to the process number:

# pstree-p process number

# top-Hp process number

two。 Query by process name:

# pstree-p `ps-e | grep server | awk'{print $1}'`

# pstree-p `ps-e | grep server | awk'{print $1}'`| wc-l

Pipes and command replacements are used here

I only learned about command replacement today, that is, commands enclosed in ``will be executed first, and then their output will be used as parameters for other commands.

The output (process number) of ps-e | grep server | awk'{print $1}'is used as the parameter of pstree-p.

The difference between pipe and command replacement is:

Pipe: pipe symbol "|" the output of the command on the left serves as the input of the command on the right

Command replacement: use the output of the command in the command substitution character "``" as an argument to the corresponding location of other commands

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