Re: Same query doing slow then quick

[Julien Cigar <jcigar@xxxxxxxxx>]

On 09/26/2012 16:41, FFW_Rude wrote:

Ok done to 512Mb and 2048Mb

I'm relaunching. See you in a few hours (so tommorrow)

with 250 000 rows and proper indexes it should run in less than a second.
be sure your indexes are set properly and that they're used (use EXPLAIN ANALYZE for that) within your query ...

Rude - Last Territory

Ou écouter ?

http://www.deezer.com/fr/music/last-territory/the-last-hope-3617781       (Post-apocalyptic Metal)

http://www.deezer.com/fr/music/rude-undertaker    (Pop-Rock)

Ou acheter ?

La Fnac

http://recherche.fnac.com/fmia14622213/Last-Territory

http://recherche.fnac.com/fmia14770622/Rude-Undertaker

iTunes

http://itunes.apple.com/us/artist/last-territory/id533857009?ign-mpt=uo%3D4

---

Date: Wed, 26 Sep 2012 07:17:56 -0700
From: [hidden email]
To: [hidden email]
Subject: Re: Same query doing slow then quick

On 09/26/2012 16:14, FFW_Rude wrote:
> Thank for you answer.
>
> shared_buffer is at 24Mb
> effective_cache_size at 2048Mb
>
> What do you mean properly ? That's not really helping a novice...
>

from my previous mail:

before looking further, please configure shared_buffers and
effective_cache_size properly, it's fundamental
you'll probably need to raise SHMALL/SHMMAX, take a look at:
http://www.postgresql.org/docs/current/static/kernel-resources.html
for 4GB of RAM I would start with shared_buffers to 512MB and
effective_cache_size to 2GB

>
>
> --
> View this message in context: http://postgresql.1045698.n5.nabble.com/Same-query-doing-slow-then-quick-tp5725486p5725505.html
> Sent from the PostgreSQL - performance mailing list archive at Nabble.com.
>
>


--
No trees were killed in the creation of this message.
However, many electrons were terribly inconvenienced.



--
Sent via pgsql-performance mailing list ([hidden email])
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-performance

jcigar.vcf (304 bytes) Download Attachment

---

If you reply to this email, your message will be added to the discussion below:

http://postgresql.1045698.n5.nabble.com/Same-query-doing-slow-then-quick-tp5725486p5725506.html

To unsubscribe from Same query doing slow then quick, click here.
NAML

---

View this message in context: RE: Same query doing slow then quick
Sent from the PostgreSQL - performance mailing list archive at Nabble.com.

-- 
No trees were killed in the creation of this message.
However, many electrons were terribly inconvenienced.

begin:vcard
fn:Julien Cigar
n:Cigar;Julien
org;quoted-printable:Belgian Biodiversity Platform;ULB (Universit=C3=A9 Libre de Bruxelles)
adr:;;;Brussels;;;Belgium
email;internet:jcigar@xxxxxxxxx
tel;work:+32(0)26505752
x-mozilla-html:FALSE
url:http://www.biodiversity.be
version:2.1
end:vcard

-- 
Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx)
To make changes to your subscription:
http://www.postgresql.org/mailpref/pgsql-performance