session waiting IO while background writer writing data

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Subject: session waiting IO while background writer writing data
From: James Pang <jamespang886@xxxxxxxxx>
Date: Mon, 14 Apr 2025 13:30:07 +0800

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

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