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Re: about memory usage with application written with php and mysql [message #172505 is a reply to message #172496]

Mon, 21 February 2011 13:11

alvaro.NOSPAMTHANX
Messages: 277
Registered: September 2010

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El 21/02/2011 13:30, lovecreatesbeauty escribió/wrote:
> I'm writing code with PHP 5, Apache 2 and Mysql 5 on Debian 6.
>
> After system just starts up, it has this much memory:
> Mem: 514644k total, 494964k used, 375900k free,
>
> After playing with my web application written with PHP and Mysql for a
> while, the system shows the memory usage as this:
> Mem: 514644k total, 494964k used, 4876k free,
>
> ...
>
> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
> 2184 www-data 20 0 65060 28m 2680 D 4.1 5.6 0:02.55 apache2
[...]
> 1564 mysql 20 0 139m 3500 792 S 0.6 0.7 0:04.24 mysqld
> 2185 www-data 20 0 40476 2352 888 S 0.0 0.5 0:00.01 apache2
> ...
>
> I wait a bit longer, it seems the system has more memory back now:
> Mem: 514644k total, 475472k used, 39172k free, 3600k
> buffers

I'm not sure about your exact question but Linux tends to consider free
memory as a wasted resource (why purchase RAM if you are not using it?)
so it normally tries to give it some use (cache or whatever). System
load is often a better indicator.

--
-- http://alvaro.es - Álvaro G. Vicario - Burgos, Spain
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[Message index]

		about memory usage with application written with php and mysql By: lovecreatesbeauty on Mon, 21 February 2011 12:30
		Re: about memory usage with application written with php and mysql By: alvaro.NOSPAMTHANX on Mon, 21 February 2011 13:11
		Re: about memory usage with application written with php and mysql By: lovecreatesbeauty on Mon, 21 February 2011 16:51
		Re: about memory usage with application written with php and mysql By: Peter H. Coffin on Mon, 21 February 2011 17:01
		Re: about memory usage with application written with php and mysql By: Jerry Stuckle on Mon, 21 February 2011 17:28

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