Gentoo Archives: gentoo-performance

From: Joost Roeleveld <joost@××××××××.org>
To: gentoo-performance@l.g.o
Subject: Re: [gentoo-performance] Horrible performance
Date: Thu, 26 Aug 2010 10:06:58
Message-Id: 201008261110.27743.joost@antarean.org
In Reply to: Re: [gentoo-performance] Horrible performance by Alex Schuster
On Thursday 26 August 2010 01:06:59 Alex Schuster wrote:
> J. Roeleveld writes: > > Can you post the result of: "ps axu"? > > This will give an indication which processes are running and using a > > lot of memory. > > The fifth colums gives the memory, right? Should this add up to the total > of the 'used' column in free -m? > > Because it does not: > > wonko@weird ~ $ free -m > total used free shared buffers cached > Mem: 3452 3117 334 0 39 279 > -/+ buffers/cache: 2798 653 > Swap: 4094 1472 2622 > > wonko@weird ~ $ total=0; for rss in $( ps aux | grep -v USER | awk '{print > $6}' ); do (( total += rss )); done; echo $(( total / 1024 )) > 1984 > > So, I get a sum of around 2 G with ps, while free -m shows 4.5 G. Whoops? > Am I missing something here, or does it look like lots of RAM is not being > freed? > > Wonko
Don't forget the buffers/cache. The 2.5G you're missing is what is used in the buffers/cache line. At least, that is how I see it. Also, I generally look at the percentages used for the memory to find the memory-hogs. And your tv-viewer (java) is using quite a bit as well. Maybe someone with more experience with tv-viewer apps can take a look and maybe give a few pointers? -- Joost