CDC Polling mecahnism
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Thread: CDC Polling mecahnism

  1. #1
    Join Date
    Sep 2002
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    edinburgh
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    CDC Polling mecahnism

    Can anyone explicitly explain how SQL Server conducts polling for CDC, the documentation states that:-

    "The capture job is started immediately. It runs continuously, processing a maximum of 1000 transactions per scan cycle with a wait of 5 seconds between cycles"

    What I want to know is how physically is this 'wait' happening. I can see that it is not the CDC job itself, as there is not scheduler attached to it, every re-run every 5 seconds. Does this mean that it is a continuous loop, re checking every 5 seconds?

    Thanks

  2. #2
    Join Date
    Sep 2002
    Posts
    5,891
    It's similar to log reader job of replication, wait is not in schedule but in cdc processing logic.

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