Install AIX7

This section covers only new installations on both the Application and Database servers (if applicable).

In addition to AIX7 default installation setting, install AIX7 with following options:

To install AIX, see the AIX documentation. See and

To ensure that the disk configuration is correct, refer to Disk configuration and the appendix "Storage and IO tuning for AIX/Oracle" in Oracle and AIX for M3 BE 15.1.x Administrator's Guide.

  1. JFS2 filesystem
  2. 64-bit Kernel
  3. Server Pack

Additional AIX7 Configuration

Service pack and technology levels

  1. After BOS installation, upgrade AIX7 to latest recommended Service Pack and Technology Level from

Edit AIX7 configuration files

  1. Change system PATH if necessary in /etc/environment.

  2. Change the default value in /etc/security/limits to:

    Field Value
    Fsize -1
    core 2097151
    cpu -1
    data -1
    rss -1
    stack -1
    nofiles 2000

AIX7 base tuning

  1. Run the following commands:


    Note the different values for minperm% depending on your memory configuration.

    /usr/sbin/chdev -l sys0 -a maxuproc=16384
    /usr/sbin/vmo -p -o minperm%=5 (physical RAM <32 GB)
    /usr/sbin/vmo -p -o minperm%=10 (physical RAM >32 GB but <64 GB)
    /usr/sbin/vmo -p -o minperm%=20 (physical RAM >64 GB)

Verifying UDP and TCP kernel parameters

  1. Run this command to check your current range for ephemeral ports:

    # /usr/sbin/no -a | fgrep ephemeral
    tcp_ephemeral_low = 32768
    tcp_ephemeral_high = 65535
    udp_ephemeral_low = 32768 
    udp_ephemeral_high = 65535

Check permissions on /tmp

  1. Run the command

    ls -la /
  2. The permissions on /tmp should be drwxrwxrwt.

    If sticky bit (t) is missing, log on as root and run the command

    chmod +t /tmp