pg.ddx.io  pgsql-patches@postgresql.org mailing list archive  

help / color / mirror / Atom feed
From: Joshua D. Drake <jd@commandprompt.com>
To: Andrew Dunstan <andrew@dunslane.net>
Cc: Simon Riggs <simon@2ndquadrant.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Stephen Frost <sfrost@snowman.net>
Cc: pgsql-patches@postgresql.org
Subject: Re: pg_dump additional options for performance
Date: Sun, 27 Jul 2008 17:24:42 -0700
Message-ID: <488D11CA.9070803@commandprompt.com> (raw)
In-Reply-To: <488D07E0.4020303@dunslane.net>
References: <20080721115602.GG18846@tamriel.snowman.net>
	<1216831237.3894.676.camel@ebony.2ndQuadrant>
	<1216832987.3894.678.camel@ebony.2ndQuadrant>
	<20080724032047.GI18846@tamriel.snowman.net>
	<1216885031.3894.739.camel@ebony.2ndQuadrant>
	<21687.1216886041@sss.pgh.pa.us>
	<1216889809.3894.747.camel@ebony.2ndQuadrant>
	<2818.1217027784@sss.pgh.pa.us>
	<1217063104.3894.1100.camel@ebony.2ndQuadrant>
	<23540.1217089204@sss.pgh.pa.us>
	<20080726164355.GH16005@tamriel.snowman.net>
	<24327.1217094186@sss.pgh.pa.us>
	<1217095404.16378.184.camel@jd-laptop>
	<1217151454.3894.1225.camel@ebony.2ndQuadrant>
	<488CA8ED.6080908@commandprompt.com>
	<488D07E0.4020303@dunslane.net>

Andrew Dunstan wrote:
> 
> 
> Joshua D. Drake wrote:
>>
>> Agreed but that is a problem I understand with a solution I don't. I 
>> am all eyes on a way to fix that. One thought I had and please, be 
>> gentle in response was some sort of async transaction capability. I 
>> know that libpq has the ability to send async queries. Is it possible 
>> to do this:
>>
>> send async(copy table to foo)
>> send async(copy table to bar)
>> send async(copy table to baz)
>>
>> Where all three copies are happening in the background?
>>
>>
> 
> IIRC, libpq doesn't let you have more than one async query active at one 
> time.

Now that I think on it harder, this isn't even a libpq problem (although 
its involved), we need the postmaster do be able to do a background 
async query. Which is (I am guessing) why libpq can only do one at a time.

Sincerely,

Joshua D. Drake





view thread (54+ messages)  latest in thread

Message-ID: <488D11CA.9070803@commandprompt.com>
Permalink:  ../488D11CA.9070803@commandprompt.com/
Also on:    postgresql.org/message-id/488D11CA.9070803@commandprompt.com

 · 

reply
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-patches@postgresql.org
  Cc: jd@commandprompt.com, andrew@dunslane.net, simon@2ndquadrant.com, tgl@sss.pgh.pa.us, sfrost@snowman.net
  Subject: Re: pg_dump additional options for performance
  In-Reply-To: <488D11CA.9070803@commandprompt.com>

* 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