Setting Kernel Parameters

[Said MOKHTARI]

The parameter your are trying to set are not for Linux (RedHat), i guess
they are for Solaris or HPUX

The right params for ORacle 9i are
# configuration du fichier /etc/sysctl.conf

#Disable packet forwarding
net.ipv4.ip_forwardi = 0
#Enable source route verification
net.ipv4.conf.default.rp_filter = 1
#Disable the magic-sysrq key
kernel.sysrq = 0
# Parametres for Oracle9i R2 (9.0.2) and +
kernel.sem =  250 32000 100 128
# kernel.shmmax = 2147483647 (2Gb) if you have 4GB RAM
kernel.shmmax = 2147483647
kernel.shmmni = 4096
kernel.shmall = 2097152
fs.file-max = 65536
net.ipv4.ip_local_port_range = 1024 65000

# to activate the new params (hot) :
sysctl -p

Verify the file /etc/pam.d/system-auth :
session    required    /lib/security/pam_limits.so
session    required    /lib/security/pam_unix.so

Add these lines to the file /etc/security/limits.conf
oracle        soft        nofile        4096
oracle        hard        nofile        8192


E. Craig Brown wrote:

> I am trying to change the default values for kernel parameters
> rmem_default, rmem_max, wmem_default and wmem_max. I modify the
> /etc/sysctl.conf file and add rows:
> rmem_default = 262144
> rmem_max = 262144
> wmem_default = 262144
> wmem_max = 262144
>
> In case this looks familiar, I am doing this to install an Oracle
> database. I have set the values of other kernel parameters in this
> way, however, when I try to set these and execute sysctl -p, these
> four return a message of
> error: 'rmem_default' is an unknown key
> error: 'rmem_max' is an unknown key
> error: 'wmem_default' is an unknown key
> error: 'wmem_max' is an unknown key
> Do any of you have any ideas as to why these parameters will not be
> set? I run the command "/sbin/sysctl -a | grep rmem_default" and have
> a message return the current value of each of these as expected. My
> guess is that while I am using the specific string that the Oracle
> Documentation guide suggests to use to change the values of these
> parameters, I probably need a different syntax.
> Thank you,
> Craig
>
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