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Thread: session waiting IO while background writer writing data

session waiting IO while background writer writing data

From
James Pang
Date:
   pgv14.8 , we found all session waiting on "DataFileWrite", and at the same time, background writer is doing IO and waiting on "DataFileWrite". Is it possible to see "background writer" block or impact user sessions IO "DatafileWrite" if both running at the same time ? 

Thanks,

James