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
