From: Tom Lane <tgl@sss.pgh.pa.us>
To: Aleksei Arefjev <aleksei.arefjev@nordicgaming.com>
Cc: Richard Huxton <dev@archonet.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: transactions start time
Date: Wed, 25 Jul 2012 10:56:20 -0400
Message-ID: <22919.1343228180@sss.pgh.pa.us> (raw)
In-Reply-To: <CAFTgB8gkQTLL_+xo7vspiEXN28L18=hDxQ7y1dSLUsicv_8R8Q@mail.gmail.com>
References: <CAFTgB8iMS8LYLbdCTmv=RBzDHhFaCvEBG9CAD3EyDxzuBvyTMA@mail.gmail.com>
<500ED9A2.3040101@archonet.com>
<CAFTgB8gkQTLL_+xo7vspiEXN28L18=hDxQ7y1dSLUsicv_8R8Q@mail.gmail.com>
Aleksei Arefjev <aleksei.arefjev@nordicgaming.com> writes:
> On 24 July 2012 20:21, Richard Huxton <dev@archonet.com> wrote:
>> I'm not sure if I'm reading this right, but are there more than 48 million
>> BEGINs that took 0s each (presumably rounded down) and then a handful
>> taking about 0.8s?
I'm wondering exactly where/how the duration was measured. If it was at
a client, maybe the apparent delay had something to do with network
glitches? It seems suspicious that all the outliers are around 0.8s.
It would be useful to look to see if there's any comparable pattern
for statements other than BEGIN.
As Richard says, a BEGIN by itself ought to take negligible time.
regards, tom lane
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Reply to all the recipients using the --to and --cc options:
reply via email
To: pgsql-performance@postgresql.org
Cc: tgl@sss.pgh.pa.us, aleksei.arefjev@nordicgaming.com, dev@archonet.com
Subject: Re: transactions start time
In-Reply-To: <22919.1343228180@sss.pgh.pa.us>
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
This inbox is served by DDX for PostgreSQL; see mirroring instructions
for how to clone and mirror all data and code used for this inbox