My problem is when i retrieve too many data from database and select using odbc node
when my workflow is run exception The timeout (30 secs) was exceeded while waiting for a response from DropPoint transactionRequest Please help how to resize defalut timelimit of workflow.
The timeout you mention is the timeout on the connection that is using a DropPoint and not a timeout on the workflow as a whole.
From within the connections pane, open the connection you are using on the workflow and modify the timeout setting there.
Separate to this, if you're calling the workflow via rest api, you can set a timeout. To override the default there, add the query string: _timeout=300 to the url in your consuming app (i.e. Not in the endpoint url setting in Flowgear).