[LUGSB] processes

Vinay Pai vinay at cs.sunysb.edu
Wed Oct 27 15:18:35 EDT 2004 

If you want to prevent stuff from starting up at runtime, use the 
sysv-rc-conf tool to pick which daemons start.   I think Redhat also has 
some GUI tool, but I don't remember... I switched to Debian a few years 
ago.

Anyhow, like other people have said, don't read too much into the memory 
usage numbers.  Shared libraries, video framebuffers, memory mapped files, 
and all kinds of other things inflate those.  Look at the output of 
"free".  The the difference between the "Used" and "Cached" fields gives 
you the amount of RAM actually used.

Also look at the output of "vmstat" after you've been using your system 
for a while.  If you see big numbers for "si and so" that means your 
system has been swapping pages in and out of memory, i.e. its been 
thrashing, and freeing more memory will help.  If not, you probably won't 
see much improvement by freeing up RAM.

Vinay



On Wed, 27 Oct 2004, Henry Lee wrote:

> does anyone know how to stop unnecessary processes in linux? i have red hat 
> linux 9 on a laptop, every time i start up red hat, it will have about 230MB 
> worth of processes running (i checked using system monitor) how do i kill 
> some processes to make the system more efficient?
> thanks!
> -henry
>
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>From lightningskull at hotmail.com Wed Oct 27 16:49:08 2004
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Subject: RE: [LUGSB] processes
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<html><div style='background-color:'><DIV class=RTE>
<P>theres a program called rcconf that I use to determine boot processes, might be useful... also, to stop processes once they're running use ps (use the -e flag to show all processes) then kill (-9 flag for force) PID of the process you want dead<BR><BR></P></DIV><BR><BR><BR>Quidquid latine dictum sit, altum viditur. 
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>----Original Message Follows---- 
<DIV></DIV>From: "Henry Lee" &lt;henryleesd at hotmail.com&gt; 
<DIV></DIV>Reply-To: Linux Users Group at Stony Brook &lt;lugsb at fsl.cs.sunysb.edu&gt; 
<DIV></DIV>To: lugsb at fsl.cs.sunysb.edu 
<DIV></DIV>Subject: [LUGSB] processes 
<DIV></DIV>Date: Wed, 27 Oct 2004 00:53:16 -0400 
<DIV></DIV>
<DIV></DIV>does anyone know how to stop unnecessary processes in linux? i have red hat linux 9 on a laptop, every time i start up red hat, it will have about 230MB worth of processes running (i checked using system monitor) how do i kill some processes to make the system more efficient? 
<DIV></DIV>thanks! 
<DIV></DIV>-henry 
<DIV></DIV>
<DIV></DIV>_________________________________________________________________ 
<DIV></DIV>Get ready for school! Find articles, homework help and more in the Back to School Guide! http://special.msn.com/network/04backtoschool.armx 
<DIV></DIV>
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>From nhorvath at ic.sunysb.edu Wed Oct 27 18:27:57 2004
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From: "Nick Horvath" <nhorvath at ic.sunysb.edu>
To: "'Linux Users Group at Stony Brook'" <lugsb at fsl.cs.sunysb.edu>
Subject: RE: [LUGSB] processes
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It would be easier if you gave me a list of what is there and I can try and
figure out what you probably don't need. You can leave out things you know
you obviously need (like "network", "mount", etc.).
-Nick

-----Original Message-----
From: lugsb-bounces at fsl.cs.sunysb.edu
[mailto:lugsb-bounces at fsl.cs.sunysb.edu] On Behalf Of Henry Lee
Sent: Wednesday, October 27, 2004 1:37 PM
To: lugsb at fsl.cs.sunysb.edu
Subject: RE: [LUGSB] processes

hey, Nick, thanks for your info. do you have a listing of all the processes 
that are safe to kill, or some thing like that?
thanks!
-henry

>From: "Nick Horvath" <nhorvath at ic.sunysb.edu>
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>To simply kill a process you can just type kill and then the pid of the
>process (can be found in top or other system monitor programs) to use kill
>on processes you do not own you will need to become root and then kill 
>them.
>To solve your problem of these excess programs (which I assume start with
>Red Hat 9) you are going to want to edit your /etc/rc.d/rc#.d directories
>(the # is replaced with a number 0-6 which represents the runlevel). You 
>can
>go through these directories and remove the links that you are sure are
>things you don't need. You should know what you are removing though because
>if you remove the wrong things you can cause your system to lose
>functionality or not boot altogether. You will need to remove things from
>all the different runlevel directories. Let me know if you need more help.
>-Nick
>
>-----Original Message-----
>From: lugsb-bounces at fsl.cs.sunysb.edu
>[mailto:lugsb-bounces at fsl.cs.sunysb.edu] On Behalf Of Henry Lee
>Sent: Wednesday, October 27, 2004 12:53 AM
>To: lugsb at fsl.cs.sunysb.edu
>Subject: [LUGSB] processes
>
>does anyone know how to stop unnecessary processes in linux? i have red hat
>linux 9 on a laptop, every time i start up red hat, it will have about 
>230MB
>
>worth of processes running (i checked using system monitor) how do i kill
>some processes to make the system more efficient?
>thanks!
>-henry
>
>_________________________________________________________________
>Get ready for school! Find articles, homework help and more in the Back to
>School Guide! http://special.msn.com/network/04backtoschool.armx
>
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