Appendix E. Kernel Parameters (98-oracle-kernel.conf)

vm.swappiness = 1
vm.dirty_background_ratio = 3
vm.dirty_ratio = 80
vm.dirty_expire_centisecs = 500
vm.dirty_writeback_centisecs = 100
kernel.sem = 250 32000 100 128
fs.aio-max-nr = 1048576
net.ipv4.ip_local_port_range = 9000 65500
net.core.rmem_default = 262144
net.core.rmem_max = 4194304
net.core.wmem_default = 262144
net.core.wmem_max = 1048576

#NOTE: These are just starting values and are not a "one-size fits all" solution.
Note

The following parameters have been removed as the default value is equal or higher than the suggested recommendation by Oracle. Included in the list are:

  • kernel.shmmax
  • kernel.shmall
  • kernel.shmmni
  • fs.file-max
  • kernel.panic_on_oops