Re: Many DataFileRead - IO waits

Hello,
I'm not able to use your perfs diagrams,
but it seems to me that not using 3rd column of that index (int_otherid2)
generates an IO problem.

Could you give us the result of

explain (analyze,buffers) SELECT
tabledata.uuid_id,tabledata.int_id,tabledata.timestamp_date,tabledata.int_otherid,tabledata.float_value,tabledata.int_otherid2,tabledata.int_otherid3,tabledata.int_rowver
FROM tabledata
WHERE timestamp_date <= '2020-02-24 03:05:00.013'::timestamp without time
zone
ND int_otherid3 = '3ad2b707-a068-42e8-b0f2-6c8570953760'
AND tabledata.int_id=8149
ORDER BY timestamp_date DESC
LIMIT 1

and this for each value of int_otherid3 ?
and tell us if you are able to change the sql ?

Thanks
Regards
PAscal

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