Minimum Parameter Settings for Installation

Use this table to set parameters manually if you cannot use the fixup scripts.

Note:

  • Unless otherwise specified, the kernel parameter and shell limit values shown in the following table are minimum values only. For production database systems, Oracle recommends that you tune these values to optimize the performance of the system. See the operating system documentation for more information about tuning kernel parameters.

  • If the current value for any parameter is greater than the value listed in this table, then the Fixup scripts do not change the value of that parameter.

Table A-1 Minimum Operating System Resource Parameter Settings

Parameter Value File

semmsl

semmns

semopm

semmni

250

32000

100

128

/proc/sys/kernel/sem
shmall

Greater than or equal to the value of shmmax, in pages.

/proc/sys/kernel/shmall
shmmax

Half the size of physical memory in bytes

See My Oracle Support Note 567506.1 for additional information about configuring shmmax.

/proc/sys/kernel/shmmax
shmmni

4096

/proc/sys/kernel/shmmni
panic_on_oops

1

/proc/sys/kernel/panic_on_oops
file-max

6815744

/proc/sys/fs/file-max
aio-max-nr

1048576

Note: This value limits concurrent outstanding requests and should be set to avoid I/O subsystem failures.

/proc/sys/fs/aio-max-nr
ip_local_port_range

Minimum: 9000

Maximum: 65500

/proc/sys/net/ipv4/ip_local_port_range
rmem_default

262144

/proc/sys/net/core/rmem_default
rmem_max

4194304

/proc/sys/net/core/rmem_max
wmem_default

262144

/proc/sys/net/core/wmem_default
wmem_max

1048576

/proc/sys/net/core/wmem_max