topic Tunable Kernel Parameters for Linux in Operating System - Linux

Tunable Kernel Parameters for Linux

K.C. Chan — Wed, 09 Oct 2002 13:05:20 GMT

Does any knows of any white papers or howto on "Tunable kernel parameters for Linux". Thanks.

Re: Tunable Kernel Parameters for Linux

Roberto_30 — Wed, 09 Oct 2002 13:32:22 GMT

Have you read "Understanding the Linux Kernel" by O'really ?

Or do you need something like below ?

memory loss
Skill: B - Jul 14, 1999
If you've ever seen the error "unable to allocate dma buffer" or "/dev/dsp: out of memory" then what has happened is the kernel cannot allocate memory for the dsp (memory under 16 meg) you can fix this problem by recompiling the kernel and selecting persistant dma buffer in the sound...

net-pf-what!?
Skill: B - Jul 14, 1999
Tired of seeing:

modprobe: can't locate module net-pf-4
modprobe: can't locate module net-pf-5

add the following two lines to
/etc/conf.modules to disable IPX & Appletalk

alias net-pf-4 off
alias net-pf-5...

Did you know?
Skill: B - Jul 14, 1999
Many kernel options are runtime configurable from /proc/sys

Here's a fun one:
echo 1 > /proc/sys/net/ipv4/icmp_echo_ignore_all

(ignore all ping...

Let me kwon how can help you ?

Roberto

Re: Tunable Kernel Parameters for Linux

K.C. Chan — Wed, 09 Oct 2002 16:05:19 GMT

Roberto,
I just want to be able to look up a list of parameters and short description of it, such as max number of file you can open, amount of resources each user can have(spawning thread), etc....Is there a howto or white paper on this? Thanks.

Re: Tunable Kernel Parameters for Linux

Stuart Browne — Wed, 09 Oct 2002 22:44:08 GMT

Will kernel documentation do?

In the kernel-documentation RPM (in RedHat atleast), there should be a directory called 'sysctl'. This has 4 text files in it documenting tunable parameters for different subsystems (kernel, file systems, virtual machine, sunrpc).

Most of the tunable options are listed in these files, and descriptions of what each option actually does.

These can all be manipulated using the 'sysctl' utility, or by forwarding data into the /proc/sys/ virtual files.

Hope this helps.

Re: Tunable Kernel Parameters for Linux

I_M — Thu, 10 Oct 2002 01:53:02 GMT

Hi

You may set some kernel parameters by "sysctl" command.
If you want to know what you can set?, use "sysctl -a" to see all the values.

Good luck

Re: Tunable Kernel Parameters for Linux

U.SivaKumar_2 — Thu, 10 Oct 2002 04:30:46 GMT

Hi,
Read my attachment.

regards,
U.SivaKumar

Re: Tunable Kernel Parameters for Linux

U.SivaKumar_2 — Thu, 10 Oct 2002 04:30:59 GMT

Hi,
Read my attachment.

regards,
U.SivaKumar

Re: Tunable Kernel Parameters for Linux

U.SivaKumar_2 — Thu, 10 Oct 2002 04:31:09 GMT

Hi,
Read my attachment.

regards,
U.SivaKumar