How big can a string value be in a Service Task?

Michael Scott: how big can a string value be in a service task? Is there a limit?

zell: We have a maxMessageSize of 4 MB, which incl. metadata. Means it is probably less, but we anyway recommend to store bigger data on an external datastore and reference that via an id/key. Big variables impact the processing and exporting performance of the system.

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