Configuring an Engine
The process execution options are the following:
Process Execution | Description |
Option |
|
|
|
Maximum number of | The maximum number of concurrent sessions supported |
sessions | by the engine. Attempts to open additional sessions will |
| raise an exception. The default value is 300. |
Maximum number of | The maximum number of concurrent process instance |
processes | executions supported by the engine. Attempts to |
| instantiate additional process instances will raise an |
| exception. The default value is 0 (no maximum) |
The number of process instances retained in memory. | |
process limit | When the number of |
| exceeds this limit, the engine swaps out dormant process |
| instances, allowing for execution of newly activated |
| process instances. The default value is 1000. |
The time interval (in milliseconds) at which the engine | |
| checks the number of process instances resident in |
| memory and swaps out dormant process instances. The |
| default value is 10,000 milliseconds. |
|
|
For information about how to use these configuration options, see “How to Tune Process Execution” on page 116.
14.Specify engine recovery behavior.
If an engine goes down, and then recovers, you can specify how long the engine waits for clients to reconnect and the behavior of the engine in the event the client does not reconnect before the timeout period.
By default, an engine waits 10 minutes (600000 milliseconds) for a client to reconnect. You can modify this value from the Options tab. If a client fails to reconnect to the engine after the timeout period, by default, the engine suspends the session. You can change the default behavior, and specify that the engine terminates the session.
15.When you have finished configuring your engine, click the Create button to create the configuration file.
The engine configuration file is saved to a standard location on the central server (see “Engine Configuration File” on page 90).
Chapter 4 Managing Engines 103
