Re: [tlug] Tip 'o the Day: discovering the real memory usage of aprocess

[David E <dave@???>]

On Date: Wed, 8 Feb 2006 13:26:34 +0900, Josh Glover <jmglov@example.com> wrote:
> ls -lyu <your_username>

Did you mean ps -lyu ??

> 
> By default, top(1) shows the virtual and resident memory sizes of
> processes, which is a little misleading, in that shared libraries are
> counted over and over again, painting a scarier picture of memory
> usage than the actual situation. Thanks to a comment attached to a
> very useful entry[1] in a very useful blog[2], I discovered the above
> invocation of ps(1), which will list, in the "SZ" column, the size of
> the process itself, discounting shared libraries and such.
> 
> For more details on all of this, see the blog entry itself: [1].
> 
> For more details on what ps(1)'s "SZ" column is really representing,
> search the manpage for '^size':
> 
> size       SZ       approximate amount of swap space that would be required if
>                     the process were to dirty all writable pages and then be
>                     swapped out. This number is very rough!
> 
> Cheers,
> Josh
> 
> [1] http://virtualthreads.blogspot.com/2006/02/understanding-memory-usage-on-linux.html
> [2] http://virtualthreads.blogspot.com/
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