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Re: slow speeds after 2 million rows inserted

From: Richard Broersma Jr <rabroersma(at)yahoo(dot)com>
To: Nikola Milutinovic <alokin1(at)yahoo(dot)com>, Chad Wagner <chad(dot)wagner(at)gmail(dot)com>
Cc: PostgreSQL general <pgsql-general(at)postgresql(dot)org>
Subject: Re: slow speeds after 2 million rows inserted
Date: 2006-12-31 17:00:50
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-general
> It was really some time ago, since I have experimented with this. My las experiment was on PG
> 7.2 or 7.3. I was inserting cca 800,000 rows. Inserting without transactions took 25 hrs.
> Inserting with 10,000 rows per transaction took about 2.5 hrs. So, the speedup was 10x. I have
> not experimented with the transaction batch size, but I suspect that 1,000 would not show much
> speedup.
> > 2. Vacuuming also makes no difference for a heavy insert-only table, only slows it down.
> Makes sense. Since my application was dumping all records each month and inserting new ones,
> vacuum was really needed, but no speedup.
> > 3. Table size plays no real factor.

Maybe this link my be useful,  it contains additional links to various postgresql preformance


Richard Broersma Jr.

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