| From: | Peter Geoghegan <pg(at)bowt(dot)ie> |
|---|---|
| To: | Tomas Vondra <tomas(at)vondra(dot)me> |
| Cc: | Andres Freund <andres(at)anarazel(dot)de>, Robert Haas <robertmhaas(at)gmail(dot)com>, Melanie Plageman <melanieplageman(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Georgios <gkokolatos(at)protonmail(dot)com>, Thomas Munro <thomas(dot)munro(at)gmail(dot)com>, Konstantin Knizhnik <knizhnik(at)garret(dot)ru>, Dilip Kumar <dilipbalaut(at)gmail(dot)com> |
| Subject: | Re: index prefetching |
| Date: | 2025-07-16 16:39:28 |
| Message-ID: | CAH2-Wz=9fmfs4rX0NMs+VBm9ZekGApaQZ3XGihTxTY46+Vngbg@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Wed, Jul 16, 2025 at 11:29 AM Peter Geoghegan <pg(at)bowt(dot)ie> wrote:
> For example, with "linear_10 / eic=16 / sync", it looks like "complex"
> has about half the latency of "simple" in tests where selectivity is
> 10. The advantage for "complex" is even greater at higher
> "selectivity" values. All of the other "linear" test results look
> about the same.
It's hard to interpret the raw data that you've provided. For example,
I cannot figure out where "selectivity" appears in the raw CSV file
from your results repro.
Can you post a single spreadsheet or CSV file, with descriptive column
names, and a row for every test case you ran? And with the rows
ordered such that directly comparable results/rows appear close
together?
Thanks
--
Peter Geoghegan
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