Installation guide

17
To view the current value specified for these kernel parameters, and to change them if
necessary:
■ Enter commands similar to the following to view the current values of the kernel
parameters:
shmmax Minimum: 536870912
Maximum: A value that is 1
byte less than the physical
memory
Recommended: More than
half the physical memory
See My Oracle Support Note
567506.1 for additional
information about
configuring
shmmax .
/proc/sys/kernel/shmmax
shmmni 4096 /proc/sys/kernel/shmmni
file
- max 6815744 /proc/sys/fs/file-max
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
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
Note: If the current value of any parameter is higher than the value
listed in this table, then do not change the value of that parameter.
Note: Make a note of the current values and identify any values that
you must change.
Parameter Command
semmsl , semmns ,
semopm , and semmni
# /sbin/sysctl -a | grep sem
This command displays the value of the semaphore
parameters in the order listed.
shmall , shmmax , and
shmmni
# /sbin/sysctl -a | grep shm
Parameter Minimum Value File