Hi Solai, Thanks for testing.
> One concern is that this targeted workload did not demonstrate nonzero > physical-read counters or read timing. That is expected. The pages you just wrote are still in shared buffers, so later scans count as blks_hit and there is nothing to read from disk. Restart the server and scan the table again, and blks_read and blk_read_time should go up. The regression test covers this path. Thanks, Shihao
