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Full Discussion: kernel parameter settings
Top Forums UNIX for Dummies Questions & Answers kernel parameter settings Post 32856 by grep on Monday 9th of December 2002 11:52:33 AM
Old 12-09-2002
kernel parameter settings
Hello All,

can someone clarify finally what are the kernel parameter settings
for ORACLE9i on SOLARIS9 ?

the following first part is copy paste from the sun's web rquirements
page for the installation


Kernel Parameter
Setting
Purpose
SEMMNI
100
Defines the maximum number of semaphore sets in the entire system.
SEMMNS
1024
Defines the maximum semaphores on the system. This setting is a
minimum recommended value, for initial installation only.

The SEMMNS parameter should be set to the sum of the
PROCESSES parameter for each Oracle database, adding the largest
one twice, and then adding an additional 10 for each database.
SEMMSL
256
Defines the minimum recommended value, for initial installation
only.
SHMMAX
4294967295
Defines the maximum allowable size of one shared memory segment.

4 GB = 4294967295
SHMMIN
1
Defines the minimum allowable size of a single shared memory
segment.
SHMMNI
100
Defines the maximum number of shared memory segments in the
entire system.
SHMSEG
10
Defines the maximum number of shared memory segments one
process can attac


AND THE FOLLOWING PART IS copy paste of another INSTALLATION GUIDE FOR ORACLE
VERSION 9.2..0.1.0
This is what they say:

Add or modify the following parameters, using any higher val
ues if they
already exist on your system. These settings can be placed at the end of the file.

set semsys:seminfo_semmni=100
set semsys:seminfo_semmns=1024
set semsys:seminfo_semmsl=256
set shmsys:shminfo_shmmax=4294967295
set shmsys:shminfo_shmmin=1
set shmsys:shminfo_shmmni=100
set shmsys:shminfo_shmseg=10


Please i will appreciate your time and help if you
can explain what are the right setings and format.

thanks,
 

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LEARN ABOUT MOJAVE

systemd-sysctl.service

SYSTEMD-SYSCTL.SERVICE(8)                                     systemd-sysctl.service                                     SYSTEMD-SYSCTL.SERVICE(8)

NAME

       systemd-sysctl.service, systemd-sysctl - Configure kernel parameters at boot

SYNOPSIS

       /lib/systemd/systemd-sysctl [OPTIONS...] [CONFIGFILE...]

       systemd-sysctl.service

DESCRIPTION

       systemd-sysctl.service is an early boot service that configures sysctl(8) kernel parameters by invoking /lib/systemd/systemd-sysctl.

       When invoked with no arguments, /lib/systemd/systemd-sysctl applies all directives from configuration files listed in sysctl.d(5). If one
       or more filenames are passed on the command line, only the directives in these files are applied.

       In addition, --prefix= option may be used to limit which sysctl settings are applied.

       See sysctl.d(5) for information about the configuration of sysctl settings. After sysctl configuration is changed on disk, it must be
       written to the files in /proc/sys before it takes effect. It is possible to update specific settings, or simply to reload all
       configuration, see Examples below.

OPTIONS

       --prefix=
           Only apply rules with the specified prefix.

       -h, --help
           Print a short help text and exit.

       --version
           Print a short version string and exit.

EXAMPLES

       Example 1. Reset all sysctl settings

           systemctl restart systemd-sysctl

       Example 2. View coredump handler configuration

           # sysctl kernel.core_pattern
           kernel.core_pattern = |/libexec/abrt-hook-ccpp %s %c %p %u %g %t %P %I

       Example 3. Update coredump handler configuration

           # /lib/systemd/systemd-sysctl --prefix kernel.core_pattern

       This searches all the directories listed in sysctl.d(5) for configuration files and writes /proc/sys/kernel/core_pattern.

       Example 4. Update coredump handler configuration according to a specific file

           # /lib/systemd/systemd-sysctl 50-coredump.conf

       This applies all the settings found in 50-coredump.conf. Either /etc/sysctl.d/50-coredump.conf, or /run/sysctl.d/50-coredump.conf, or
       /usr/lib/sysctl.d/50-coredump.conf will be used, in the order of preference.

       See sysctl(8) for various ways to directly apply sysctl settings.

SEE ALSO

       systemd(1), sysctl.d(5), sysctl(8),

systemd 237                                                                                                              SYSTEMD-SYSCTL.SERVICE(8)
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