Integration Server automatically executes when it loads a package into memory is called :
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Flow service
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Startup service
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Auto Initialize service
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Pipeline
In webMethods Integration Server, a Startup Service is a special Flow service configured to execute automatically when its package is loaded into memory (typically during server startup). This is useful for initialization tasks like loading configuration data or establishing connections. Flow services and Pipeline are general concepts, not specific to auto-execution on package load.
A 'startup service' is a flow service specifically flagged to run automatically whenever the Integration Server loads its containing package into memory — commonly used for initialization tasks like setting global variables or opening connections. A regular flow service only runs when explicitly invoked, so it wouldn't fire automatically on package load.