[CentOS] Memory reporting...

[Peter Kjellstrom]

On Monday 06 July 2009, John Doe wrote:
> Hi,
>
> I have a little question about memory usage...
>
> When I do a free, I get:

/proc/meminfo may give you a more detailed summary.

/Peter

>              total       used       free     shared    buffers     cached
> Mem:      18482800   18030668     452132          0     683068    9426792
> -/+ buffers/cache:    7920808   10561992
>
> But, when I do a ps, mysql is the only process that takes noticable memory;
> and it is far from 7.9GBs...
>
> USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
> mysql    28346 36.0 15.6 3241196 2884692 ?     Sl   Jul04 981:19  \_
> /usr/libexec/mysqld --basedir=/usr --datadir=/IOL/mysql --user=mysql
> --pid-file=/var/run/mysqld/mysqld.pid --skip-external-locking --port=3306
> --socket=/IOL/mysql/mysql.sock
>
> Once you removed the buffers and the cached memory from the total used
> memory... what is left? Looks like I have "something" (that is not
> buffers/cached) that takes more than 4GB... Could it be disk cache or is it
> included in the cached value?
> Any idea?
>
> Thx,
> JD
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