Administration guide > Tune and performance


Operational checklist


AIX operating system settings

  1. TCP_KEEPINTVL

    The TCP_KEEPINTVL setting is part of a socket keep-alive protocol that enables detection of network outage. The property specifies the interval between packets that are sent to validate the connection. When you are using WebSphere eXtreme Scale, set the value to 10.

    To check the current setting...

    # no -o tcp_keepintvl

    To change the current setting...

    # no -o tcp_keepintvl=10

    The TCP_KEEPINTVL setting is in half seconds.

  2. TCP_KEEPINIT

    The TCP_KEEPINIT setting is part of a socket keep-alive protocol that enables detection of network outage. The property specifies the initial timeout value for TCP connection. When you are using WebSphere eXtreme Scale, set the value to 40.

    To check the current setting...

    # no -o tcp_keepinit

    To change the current setting...

    # no -o tcp_keepinit=40

    The TCP_KEEPINIT setting is in half seconds.


Transport behavior

To modify the transport behavior of the grid, edit...

java/jre/lib/orb.properties


startOgServer

Use parameters in the startOgServer script. In particular, use the following parameters:


Port settings

WebSphere eXtreme Scale has to open ports for communications for some transports. These ports are all dynamically defined. However, if a firewall is in use between containers then specify the ports. Use the following information about the ports:


Security settings

Verify that security settings are configured correctly:

To verify the security settings, you can try to use a malicious client to connect to the configuration. For example, when the SSL-Required setting is configured, a client that has a TCP_IP setting with or a client with the wrong trust store should not be able to connect to the server. When authentication is required, a client with no credential, such as a user ID and password, should not be able to connect to the sever. When authorization is enforced, a client with no access authorization should not be granted the access to the server resources.


Monitor the environment

Options

See...


Parent topic:

Plan the WebSphere eXtreme Scale environment


Parent topic:

Tune and performance


Related concepts

Plan overview
Hardware and software requirements
JEE considerations
Cache topology: In-memory and distributed caching
Catalog service
Container servers, partitions, and shards
Capacity planning
Operating systems and network tuning
Plan for network ports
ORB properties and file descriptor settings
JVM tuning for WebSphere eXtreme Scale
Use WebSphere Real Time


Related tasks

Configure failover detection
Tune the dynamic cache provider
Tune the cache sizing agent for accurate memory consumption estimates

Related reference

Directory conventions