AIX Tuning

Networking

Check the current values of the network tuning parameters:

no -a | more

or

ifconfig en0
en0:
...
        tcp_sendspace 131072 tcp_recvspace 65536 rfc1323 0

Specifies the various restrictions on resource usage on the user account.

Check the change with the following command

# ulimit -a
...
open files                      (-n) 2000

Perform the following steps to change the open file limit to 10,000 files. Edit the /etc/security/limits file.

nofiles =  10000 
nofiles_hard = 10000

Save and close the file, logoff from the system, and logon again