Re: BUG #15609: synchronous_commit=off insert performance regression with secondary indexes

From: Peter Geoghegan <pg(at)bowt(dot)ie>
To: "Saul, Jean Paolo" <paolo(dot)saul(at)verizonconnect(dot)com>
Cc: Andrew Gierth <andrew(at)tao11(dot)riddles(dot)org(dot)uk>, PostgreSQL mailing lists <pgsql-bugs(at)lists(dot)postgresql(dot)org>
Subject: Re: BUG #15609: synchronous_commit=off insert performance regression with secondary indexes
Date: 2019-02-12 01:22:52
Message-ID: CAH2-Wzm+9tmVqpJWM28P_OEhMj2_ihydyt=rziLV3SDnu3NTTQ@mail.gmail.com
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-bugs

On Mon, Feb 11, 2019 at 5:19 PM Saul, Jean Paolo
<paolo(dot)saul(at)verizonconnect(dot)com> wrote:
> Just to clarify we were using shared_buffers=30GB for our initial pgbench runs that would take a few hours to complete. In an attempt to make the tests repeatable before submitting I have simplified the steps.

Can you retry, but pass "-M prepared" to pgbench? That can easily make
something like this 40%+ faster. I'm not supposing that that'll change
the difference very significantly, but you'll at least have more
signal and less noise that way.

--
Peter Geoghegan

In response to

Responses

Browse pgsql-bugs by date

  From Date Subject
Next Message Chapman Flack 2019-02-12 01:24:22 Re: BUG #15629: Typo in Documentation
Previous Message Chapman Flack 2019-02-12 01:21:35 Re: Re: BUG #15629: Typo in Documentation