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Kernel Parameters - Oracle

In this third part of a five-part article series on installing Oracle Database XE, you'll begin the installation process on a Linux platform. This article is excerpted from chapter 27 of the book Beginning PHP and Oracle: From Novice to Professional, written by W. Jason Gilmore and Bob Bryla (Apress; ISBN: 1590597702).

TABLE OF CONTENTS:
  1. Oracle Database XE: Installing on a Linux Platform
  2. Kernel Parameters
By: Apress Publishing
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November 11, 2010

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For Oracle Database XE to install and run successfully, you must ensure that the kernel parameters in Table 27-1 have the corresponding minimum values. The Oracle installer checks these values before installation will proceed.

Table 27-1. Minimum Linux Kernel Parameter Values

Kernel ParameterMinimum Parameter Value
semmsl250
semmns32000
semopm100
semmni128
shmmax536870912
shmmni4096
shmall2097152
file-max65536
ip_local_port_range102465000

 

  

  

  

  

  

  

  

  

  

You can confirm these parameters from a shell prompt using thesysctlandegrep commands as follows:

[root@phpxe ~]# /sbin/sysctl -a | egrep 'sem|shm|file-max|ip_local' net.ipv4.ip_local_port_range = 1024  65000 vm.hugetlb_shm_group = 0
kernel.sem = 250       32000    100  128 kernel.shmmni = 4096
kernel.shmall = 2097152
kernel.shmmax = 2147483648
fs.file-max = 65536
[root@phpxe ~]#

The kernel parameterssemmsl,semmns,semopm, andsemmnicorrespond to the four values in thesysctloutput for parameterkernel.sem. Many of these parameters will already be at least set at their minimum values. For those parameters that need to be changed, edit the file/etc/sysctl.conf and change the parameters to these minimum values. You can change these values in the running kernel immediately by running the command
/sbin/sysctl -p. These values will be set automatically in the future when your workstation starts.

Please check back next week for the continuation of this article.



 
 
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