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How to join two sources with summary indexing to improve performance?

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Hello, I am quite green at Splunk and have a problem I could use some help with. My data is coming from a postgres database via the Splunk DB Connect App, where each input (source) into Splunk is a postgres table. I am trying to join two sources, which I can do in a regular search, but am trying to improve performance since my join search is running quite long, so I am looking at summary indexing. The two sources are as follows: **action_times** action_time act_id **actions_table** act_id operation Here is the base search that returns the expected results. source="action_times" | join type=inner act_id [search source="actions_table"] | stats count by operation I have been able to set up a summary index and schedule a report which runs the search above, but the `actions_table` really does not update often so most subsequent runs of the scheduled report return no events, despite there being tens of thousands of events from `action_times`. **What I would like to do...** - I would like to use summary indexing to pull in the joined data, either with an actual join command, or without. If there is any other helpful information I can provide, please let me know. Thank you,

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