Siebel Business Analytics Applications Installation and Administration Guide > DAC Quick Start > DAC Common Tasks >

Determining the Informatica Server Maximum Sessions Parameter Setting

You set the Maximum Sessions parameter value when performing the procedure Registering Informatica Servers in the DAC Client. This parameter specifies the maximum number of workflows that can be executed in parallel on the Informatica server. If the number of sessions is zero or is not specified, the DAC server assigns the default value of five for the DAC Lite version and 10 for the full DAC version. The DAC Lite version cannot run more than five sessions in parallel.

You should consider the following factors when determining the Maximum Sessions parameter value:

• How powerful the machine is that hosts the Informatica Server.
• How many Informatica Server servers are available.
• The number of Runnable tasks in the queue. A Runnable task is a task for which the Depends On tasks have completed and is ready to be run but is waiting for an Informatica slot to be available. For information about the different task run statuses, see About the DAC Current Run Tab.

  For an optimal run, the runnable queue should be at zero or should reach zero in a short time. For example, Figure 14 shows an ideal performance run when 15 sessions were run in parallel. There were many runnable tasks before the process began, but the queue soon reached zero.

  You can generate a run analysis such as Figure 14 from the right-click menu (Get Run Information > Get Graph) on the DAC Current Run and Run History tabs. If you find that the runnable curve does not reach zero in a short time, you should increase the Maximum Sessions parameter value to make more Informatica slots available.

  Figure 14. Sample Performance Run