Python: Statistics on the physical memory consumed by the Apache process

The previous description of how to count the system remaining memory: http://msiyuetian.blog.51cto.com/8637744/1772888

The following is primarily a statistical analysis of the physical memory occupied by the Apache process

We can see which processes and their PID are in Apache using the following command

1) PS aux |grep httpd

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2) pidof httpd

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The directories corresponding to these processes are temporarily stored in the/proc/directory under the PID name, while the physical memory information of the recording process is recorded in the status file (Vmrss) in the corresponding PID directory, and the sum of the statistics Vmrss is the physical memory occupied by all Apache processes.

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The code is as follows:

Vim httpd.py

#!/usr/bin/env python Import OS From subprocess import Popen, PIPE Def getpid (): p = Popen ([' pidof ', ' httpd '], Stdout=pipe, Stderr=pipe) PIDs = P.stdout.read (). Split () For I in PIDs: fn = os.path.join ('/proc/', I, ' status ') With open (FN) as FD: For line in FD: If Line.startswith (' Vmrss '): Http_mem = Int (Line.split () [1]) Sum + = Http_mem Break return sum Def total_mem (f): With open (f) as FD: For line in FD: If Line.startswith (' Memtotal '): Total_mem = Int (Line.split () [1]) Return Total_mem if __name__ = = ' __main__ ': PIDs = Getpid () Http_mem = Parsepidfile (PIDs) Total = Total_mem ('/proc/meminfo ') Print "Apache memory is:%s KB"% Http_mem Print "Percent:%.2f"% (http_mem/float (total) *100) + '% '

Code Description :

The Subprocess module can invoke the command pidof httpd get the PID and output the return value

The validation results are as follows:

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We can visit Apache several times in the following ways to see the change in memory percentage

Yum Install-y elinks

Elinks-dump http://localhost

This article is from the "M April Days" blog, please be sure to keep this source http://msiyuetian.blog.51cto.com/8637744/1787950

Python: Statistics on the physical memory consumed by the Apache process