Unlike most other *NIX systems, Linux allows modification of most kernel parameters while the system is up and running. There is no need to reboot the system after making kernel parameter changes.
Oracle Database 10g Release 2 requires the following kernel parameter settings. The values given are minimums, so if your system uses a larger value, do not change it.
To set up kernel parameters, add these lines at the end of the file /etc/sysctl.conf if they are not present:
kernel.shmall = 2097152 kernel.shmmax = 536870912 kernel.shmmni = 4096 kernel.sem = 250 32000 100 128 fs.file-max = 65536 net.ipv4.ip_local_port_range = 1024 65000 net.core.rmem_default=262144 net.core.wmem_default=262144 net.core.rmem_max=262144 net.core.wmem_max=262144
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