Q about swap size

Bill Davidsen davidsen at tmr.com
Sun Jul 11 20:25:23 UTC 2010

Robert G. (Doc) Savage wrote:
> On Sun, 2010-07-11 at 09:01 -0700, JD wrote:
>> On 07/11/2010 09:10 AM, Robert G. (Doc) Savage wrote:
>>> I've been running Fedora on my old Thinkpad A22p (P-III/M w/512MB) 
>> With only half a gig of ram, you will end up thrashing like crazy.
>> Of course you will have a high load factor.
>> How about putting in it the maximum amount of ram the notebook can handle.
>> Ram is cheap now!
> JD,
> I'd love to, but the operative word in my msg was "old". The memory
> sockets in the A22p support only 256MB SODIMMs. 512MB was huge in those
> days.
> Since sending my last message I discovered that F13, like earlier
> versions, insists on installing the beagle indexer. That's a serious
> performance killer on an old machine. Removing beagle, beagle-gnome, and
> beagle-evolution has provided some relief, but there's something else
> still feeding on my system. I'm looking for other CPU/RAM hungry
> services I don't need. Like beagle, they may not be controlled by
> chkconfig.
If you are out of CPU rather than memory, and that looks likely, there's one 
more thing you can do to find the culprit. Install the system accounting 
package, and run that for a while. You will then be able to generate a report of 
the CPU and memory usage of processes as they terminate. At the least you will 
have to do a sort and find the processes with high CPU usage overall (total 
CPU-sec), and you might want to look for processes which use a high percentage 
of CPU as well.

Once you can see where the CPU is going you can address the problem. That may 
mean tuning, it may mean installing puppy linux, or tiny core linux, or deciding 
that you like Fedora well enough to live with the issue.

Sitting and observing top may give you an answer, or you might see false 
positives instead. Accounting can be turned on and off, so you can only try it 
when you think you have the problem.

I run several VMs with less memory than that and they run okay, so depending on 
what you are doing I don't think the memory is your problem.

Bill Davidsen <davidsen at tmr.com>
   "We have more to fear from the bungling of the incompetent than from
the machinations of the wicked."  - from Slashdot

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