| From: | "Hayato Kuroda (Fujitsu)" <kuroda(dot)hayato(at)fujitsu(dot)com> |
|---|---|
| To: | 'lakshmi' <lakshmigcdac(at)gmail(dot)com> |
| Cc: | Mircea Cadariu <cadariu(dot)mircea(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, "tomas(at)vondra(dot)me" <tomas(at)vondra(dot)me> |
| Subject: | RE: parallel data loading for pgbench -i |
| Date: | 2026-02-20 09:59:15 |
| Message-ID: | TYRPR01MB121560B291DA3CD262CC7A09AF568A@TYRPR01MB12156.jpnprd01.prod.outlook.com |
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| Lists: | pgsql-hackers |
Dear Iakshmi,
Thanks for the measurement!
> For scale 500, the serial initialization on my system takes around 34.3 seconds.
> Using parallel initialization without partitions (-j 10) makes the client-side
> data generation noticeably faster,But the overall runtime ends up slightly
> higher because the vacuum phase becomes much longer.
To confirm, do you know the reason why the VACUUMing needs more time than serial case?
Best regards,
Hayato Kuroda
FUJITSU LIMITED
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