AIX - System Parameters

Base

Display system parameters:

lsattr -E -l sys0

Change system parameters:

chdev -l sys0 -a {parameter}={value}
# Ex: chdev -l sys0 -a maxuproc=150

Enabling I/O Completion Ports:

# Get status
lsdev | grep iocp

# Enable:
smitty iocp

# Restart the system to make the changes permanent.
shutdown -Fr

Tunable

Available tunable:

# Path: /etc/tunables
schedo
vmo
ioo
raso
no
nfso
asoo

Display value options:

{tunable} -a
# Ex: vmo -a

Display options details:

{tunable} -L
# Ex: no -L

Display hidden options:

{tunable} -F
# Ex: no -F

Set new value:

{tunable} -o {option}={value}
# Ex: no -o tcp_keepidle=600