Re: Setting Linux Kernel Parameters

Lord!

All I have to do on Windows is click 'Install'!

I did actually manage this last year, before the NT version of 9i was out, and it worked. Did I keep my notes? No. Am I stupid?

(Don't answer that!)

Thanks for this -though I have to tell you, I managed to make more sense of the hieroglyphs at Luxor.

;-o

HJR

--
------------------------------------------
Resources for Oracle : www.hjrdba.com
============================

"samy atoui" <s.atoui_at_bigfoot.com> wrote in message
news:3CA5BB53.F56001AC_at_bigfoot.com...


> Hello Howard,

> the "clean way" is to consider your run-levels as another poster

> mentioned.

> Advantage: you have fine-grained control which scripts are executed.

> eg run-levels on RH box (may vary if you use another distribution):

>

> cat /etc/inittab

> #

> # inittab       This file describes how the INIT process should set up

> #               the system in a certain run-level.

> #

> # Author:       Miquel van Smoorenburg, <miquels_at_drinkel.nl.mugnet.org>

> #               Modified for RHS Linux by Marc Ewing and Donnie Barnes

> #

>

> # Default runlevel. The runlevels used by RHS are:

> #   0 - halt (Do NOT set initdefault to this)

> #   1 - Single user mode

> #   2 - Multiuser, without NFS (The same as 3, if you do not have

> networking)

> #   3 - Full multiuser mode

> #   4 - unused

> #   5 - X11

> #   6 - reboot (Do NOT set initdefault to this)

> #

> id:3:initdefault:

>

> # System initialization.

> si::sysinit:/etc/rc.d/rc.sysinit

>

> l0:0:wait:/etc/rc.d/rc 0

> l1:1:wait:/etc/rc.d/rc 1

> l2:2:wait:/etc/rc.d/rc 2

> l3:3:wait:/etc/rc.d/rc 3

> l4:4:wait:/etc/rc.d/rc 4

> l5:5:wait:/etc/rc.d/rc 5

> l6:6:wait:/etc/rc.d/rc 6

> <snip>

>

> Welcome to Linux!

> Manuela Mueller

>

> "Howard J. Rogers" wrote:

> >

> > Thank you!

> >

> > That alternative approach is ringing bells now. Here's what I did (and

as


> > far as I can tell, it's certainly doing the deed):

> >

> > cd /etc

> > vi rc.config

> > bung the lines

> > cd /proc/sys/kernel

> > echo blah blah blah > sem

> > echo xxx > shmmax

> > echo yyy > shmmni

> >

> > (these are the only parameters that needed changing)

> >

> > Save file, reboot, and the changed values are now visible every time I

cat


> > sem.

> >

> > Is there a problem doing things this way?  You mentioned editing

rc.local


> > "for now"... why is doing it that way considered a short-term thing,

since


> > it seems to do the job perfectly well.  I tried editing rc.local, but it

> > didn't seem to work, whereas rc.config did.  Anything wrong with doing

it


> > this way rather than that?

> >

> > Sorry for what are probably painfully obvious questions.

> >

> > Regards

> > HJR

> > --

> > ------------------------------------------

> > Resources for Oracle : www.hjrdba.com

> > ============================

> >

> > "crappy" <crappygolucky_at_hotmail.com> wrote in message

> > news:ce31c410.0203292257.25f51f8e_at_posting.google.com...

> > > actually modifying those .h files is probably not such a great idea,

> > > because doing it is so .. well, permament.  also that will require you

> > > re-compile the kernel, which is also something you mentioned:

> > > generally something which, if you're not experienced with it, you

> > > shouldn't try unless you're prepared to spend some time figuring out

> > > what went wrong (you do learn a lot in the process tho).

> > >

> > > in fact, your initial approach is probably better: echo the params to

> > > the proc "filesystem".  those changes take effect immediately, but not

> > > permamently as you said.  now, .profile is something that happens on

> > > each login (not precisely, but close enough) so that's not it: the

> > > place you want to put it in is in a startup script, that is, /etc/rc.d

> > > ... to do it "right" will require a little reading about run levels,

> > > but you can always just put it in the rc.local ("for now").

> > >

> > >

> > > "Howard J. Rogers" <dba_at_hjrdba.com> wrote in message

> > news:<a837go$g83$1_at_lust.ihug.co.nz>...

> > > > Lovely. That's really useful, so thank you.

> > > >

> > > > But it unfortunately doesn't tell me *how* to modify those

parameters,


> > which

> > > > is what I actually needed to know.  The structure of those files

looks a


> > bit

> > > > tricky, and I don't want to bodge them up. It then also says 'if you

> > modify

> > > > them, rebuild the kernel', which again I'm sure is sound advice, but

it


> > > > doesn't say *how* to do that.

> > > >

> > > > If these aren't steps which are easily describable, then fair

enough: if


> > I

> > > > have to get the Big Boys Book of Linux for Windows Users out of the

> > library,

> > > > I'll do it.  I just thought maybe it wasn't that tricky... ?

> > > >

> > > > Regards

> > > > HJR

> > > > --

> > > > ------------------------------------------

> > > > Resources for Oracle : www.hjrdba.com

> > > > ============================

> > > >

> > > >

> > > >

> > > > "Eve Hoellwarth" <hoellwarth-e_at_gmx.at> wrote in message

> > > > news:v94aausclahcbd0nritk14o2cd1s7nhsst_at_4ax.com...

> > > > > "Howard J. Rogers"  wrote

> > > > >

> > > > > >Would anyone care to enlighten a poor Windows user on how to go

about


> > > >  making

> > > > > >the kernel parameter changes you need to make on a Linux box

before


> > > > > >installing Oracle a permanent fixture of the kernel?

> > > > > >

> > > > > >In other words, for installation, I do the following one-off

> > exercise:

> > > > > >

> > > > > >cd /proc/sys/kernel

> > > > > >

> > > > > >echo 250 32000 100 128 > sem

> > > > > >

> > > > > >echo 33554432 > shmmax

> > > > > >

> > > > > >echo 4096 > shmmni

> > > >

> > > > > >And installation proceeds smoothly accordingly.  But how to make

the


> > > >  change

> > > > > >permanent?  In the deepest recesses of my brain, the words

".profile"


> > are

> > > > > >stirring into life, but not sure if that's really the way to do

it


> > (or

> > > >  whose

> > > > > >profile to alter if so, so that the settings are made

system-wide).


> > > > >

> > > > > Out from the linux install guide from technet.oracle.com

> > > > >

> > > >

> >

http://technet.oracle.com/docs/products/oracle8i/pdf/linux_installguide_817.


> > > > pdf:

> > > > >

> > > > > Set the kernel parameters for shared memory in

> > > > > /usr/src/linux/include/asm/shmparam.h and the semaphores in

> > > > > /usr/src/linux/include/linux/sem.h

> > > > >

> > > > > In .profile you should set your oracle environment variables

> > > > >

> > > > > hth

> > > > > Eve

> > > > >