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Re: Too many processes question.



On Fri, 2007-01-26 at 07:55 +0000, James Wilkinson wrote:
> I wrote:
> > So a "slow" computer is actually rarely to do with raw processor power.
> > It's much more likely to be some combination of the hard disk not using
> > DMA, or there being a memory hog on the system that is causing it to
> > swap a lot, or there being something running in the background that is
> > really accessing the hard drive a lot.
> > 
> > You may have noticed that I like blaming the hard drive for speed
> > problems. Les, is the hard drive light on much?
> 
> Les replied:
> > All the time (I'm pretty sure that is broken on this system, because I
> > can usually hear the drive spin up or the arm movement anyway).  The
> > problem seems to be though, with all that stuff in memory, that my main
> > memory (only 256M on this machine) is pretty filled up.  And I think
> > that 256M of OS and X is just way the heck too much.  
> > 
> > I really don't want too much going on, just X and its requriements, The
> > Kernal, the print stuff, the USB stuff and the CD and DVD.  So what is
> > with 104 processes.  Even Windows only shows 54 on my XP box, and I
> > thought Windows was a HOG.
> 
> Well, one thing is that Unix has always worked with multiple small
> processes where Windows has wanted One Big Monolith. (And Unix has been
> less buggy for it).
> 
> Having said that, Fedora does come with more stuff running than is
> always strictly necessary. To begin with, I'd recommend running
> system-config-services and seeing what is configured to run.
> 
> You may want to turn off:
>  * auditd, msctrans, setroubleshoot until you have trouble getting something to run and
>    think SELinux might be a culprit
>  * autofs
>  * avahi-daemon
>  * bluetooth, hidd and pand
>  * CPUspeed if your CPU can't take advantage of power-saving
>  * dhcdbd
>  * diskdump and netdump
>  * dund
>  * there's no point having firstboot enabled any more
>  * gpm if you rarely drop down to a virtual console
>  * irda if you're not using infrared
>  * irqbalance (I doubt you've got a hyperthreading or SMP system with
>    256 MB)
>  * mdmpd and multipathd
>  * netfs and netplugd
>  * nfs, nfslock, rpcgssd, rpcidmapd, rpcsvcgssd
>  * nscd
>  * pscd
>  * smb (Samba)
>  * sshd
>  * ypbind
>  * yum-updatesd (this means you'd be responsible for running yum or
>    similar to update the system -- every week at least)
> 
> If there are no on-demand services, you can turn xinetd off, too.
> 
> Not all of these may be there or turned on by default. And there may be
> other things that you've got installed and running that you don't use.
> 
> Having looked into the services (and stopped ones you don't want -- it
> may be easiest to go to run-level 3 and back, or reboot), then run the
> top command. Press "shift-M", which sorts the entries by "RES", defined
> as "the non-swapped physical memory a task has used". Take a look at the
> largest processes. If you see something you're pretty sure you don't
> need, see if you can turn it off.
> 
> Ask again if you need more help.
> 
> Hope this helps,
> 
> James.
> 
> -- 
> E-mail:     james@ | Remember, half-measures can be very effective if all you
> aprilcottage.co.uk | deal with are half-wits.
> 
Thanks, James,
	I knew Some of these and may have the majority turned off already.  My
goal is a stripped simple system too use to demo somthing.  This is a
great help.

Regards,
Les H


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