Hi,
If you like to modify only a few tunables or modules use kctune or kcmodule respectively:
# kctune nproc=1000
# kcmodule krm=loaded
If tunables/modules are dynamic you├в re done, else you need to reboot.
In order to perform many changes at once, e.g. apply tunable settings from another system do
the following:
1) Export the current kernel configuration to a file:
# kconfig -e system_config
* The current configuration (including any changes being held for
next boot) has been exported to /root/system_config.
NOTE: The obsolete system_prep script has been rewritten to incoke kconfig -e
2) Now change the tunable values by editing this file:
# vi system_config
*
* Created on Thu Jul 31 11:08:37 2003
*
version 1
configuration nextboot "" [3f27e819]
*
* Module entries
*
module drmfglrx auto 0.1.0
module drmfgl auto 0.1.0
module gvid_him_rad auto 0.1.0
...
...
module lba best [3F0E6070]
module sba best [3F0E6070]
module root best [3F0E6070]
*
* Swap entries
*
*
* Dump entries
*
*
* Driver binding entries
*
*
* Tunables entries
*
tunable secure_sid_scripts 0x0
tunable nstrpty 60
tunable dbc_max_pct 20
tunable vx_ninode 30000
NOTE: Do not try to change modules. Tunables only.
3) Now import the modified configuration:
If you modified only dynamic tunables, then changes will be applied immediately:
# kconfig -i system
WARNING: The automatic 'backup' configuration currently contains the
configuration that was in use before the last reboot of this
system.
==> Do you wish to update it to contain the current configuration
before making the requested change? y
* The automatic 'backup' configuration has been updated.
* system has been imported. The changes have been applied to the
currently running system.
If you modified at least one static tunable it takes a reboot to apply the changes:
# kconfig -i system_config
* The automatic 'backup' configuration has been updated.
NOTE: The configuration being loaded contains changes that cannot be
applied immediately:
-- The tunable vx_ninode cannot be changed in a dynamic fashion.
NOTE: The changes will be held for next boot.
* system_config has been imported. The changes will take effect
at next boot.
Regards,
Sooraj
"UNIX is basically a simple operating system, but you have to be a genius to understand the simplicity" - Dennis Ritchie
