Introduction to the memory methods used in viewing a program under Linux

Introduction to the memory methods used in viewing a program under Linux

When developing and operating on Linux, it is unavoidable to look at the memory consumed by a program. Common methods are summarized as follows (note the fourth method):

First type: Ps-aux | grep process_name

For example: now you want to monitor the memory of/USR/BIN/SSHD, first to find the PID, and then use top for targeted monitoring, RES is the memory value, see the next two graphs: 650) this.width=650; "Src=" https:// S3.51cto.com/wyfs02/m00/93/27/wkiol1kii4thfsqdaaakwdrvle8194.png "title=" 11.PNG "alt=" Wkiol1kii4thfsqdaaakwdrvle8194.png "/>

Top-p 1231, as follows: 650) this.width=650; "Src=" Https://s3.51cto.com/wyfs02/M02/93/28/wKioL1kIi_ Mqqw4aaaawvdqix78669.png "title=" 11.PNG "alt=" Wkiol1kii_mqqw4aaaawvdqix78669.png "/>

The second kind: top-p PID View program case as shown!

The third type: Cat/proc/pid/status

This will print out the details of the current process, where memory is Vmrss.
Note: The PID is to be replaced with an ID number.

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!!! Fourth: Linux View the processes that occupy the highest memory

ps aux|head-1;ps aux|grep-v pid|sort-rn-k +4|head
or Top (then press p, note that this is capitalized), as follows:

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This combination of commands is actually the following two lines of command:
PS aux|head-1ps aux|grep-v pid|sort-rn-k +3|head
the first sentence is primarily to get the title (USER PID%cpu%MEM VSZ RSS TTY STAT START time COMMAND).
the next grep-v pid is to remove the title of the PS aux command, that is, grep does not contain the three-letter combination of the PID line, and then the result is sorted using sort.
sort-rn-k +3 the-rn R in this command is ordered in reverse order, n is sorted by numeric size, and-K +3 is sorted for the contents of column 3rd, and the first 10 rows of data are obtained by using the Head command. (where | represents a pipeline operation)

Extended:

Linux viewing processes that occupy the highest CPU
PS Aux|head-1;ps aux|grep-v pid|sort-rn-k +3|head
or top (then press m, note that this is uppercase)

This article is from the "Hand of the Paladin Control" blog, please make sure to keep this source http://wutengfei.blog.51cto.com/10942117/1921273

Introduction to the memory methods used in viewing a program under Linux