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From:David Brian Chait Date:February 4 2011 2:14am
Subject:RE: How do increase memory allocated to MySQL?
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Yannis,
	How is the data structured? Can you give us an example of the queries that you are trying
to run? Do you have indexes in place? A very inefficient query, or poorly structured
database can lead to this type of timeout issue on the type of low end hardware that you
are using.

Thanks,
David

-----Original Message-----
From: Yannis Haralambous [mailto:yannis.haralambous@stripped] 
Sent: Thursday, February 03, 2011 5:43 PM
To: mysql@stripped
Cc: YAGO@stripped
Subject: How do increase memory allocated to MySQL?

Hi everybody,

I have loaded a very big amount of data in my MySQL database (coming from the YAGO
project): 

-rw-rw----  1 yannis  admin           65  3 fév 16:07 db.opt
-rw-rw----  1 yannis  admin   6392030392  3 fév 21:35 wasfoundin.MYD
-rw-rw----  1 yannis  admin  11085793280  4 fév 04:54 wasfoundin.MYI
-rw-rw----  1 yannis  admin         8668  3 fév 16:09 wasfoundin.frm

as you can see the MYI file is 11Gb and the MYD file 6.4Gb.

Whenever I try to send a query through phpmyadmin, it crashes and I get returned to the
initial page of phpmyadmin.
When I send an SQL query directly, it works, but it takes many minutes (a simple SELECT
will take about 10 minutes).

I'm using the latest version of MAMP under MacOS X (on a MacBook Pro 2.6 GHz Intel Core 2
with 4Gb of RAM).

What can I do to make phpmyadmin work? Is it a chance to gain more speed when interacting
through regular SQL queries, or is it hopeless?
Where can I find more information about using MySQL with such big tables?

Thanks in advance 

--
-------------------------------------------------------
Yannis Haralambous
Directeur d'études
ADRESSE TEMPORAIRE :
University of Aizu
Aizu-Wakamatsu, Fukushima-ken  965-8580, Japon ADRESSE PERMANENTE :
Institut Télécom, Télécom Bretagne
Département Informatique
UMR CNRS 3192 Lab-STICC
Technopôle Brest Iroise
CS 83818, 29238 Brest Cedex 3, France
Tel: +33 2 29 00 14 27
Fax: +33 2 29 00 12 82
Email: yannis.haralambous@stripped
Internet: http://omega.enstb.org/yannis
ICBM address: 48°21'31.57"N 4°34'16.76"W
Twitter: y_haralambous
-------------------------------------------------------
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...the ball I threw while playing in the park has not yet reached the ground

Es gab eine Zeit, wo ich nur ungern über Schubert sprechen, nur Nächtens den
Bäumen und Sternen von ihm vorerzählen mögen.

Thread
How do increase memory allocated to MySQL?Yannis Haralambous4 Feb
  • RE: How do increase memory allocated to MySQL?David Brian Chait4 Feb
    • Re: How do increase memory allocated to MySQL?Yannis Haralambous4 Feb
      • Re: How do increase memory allocated to MySQL?Johan De Meersman4 Feb
      • RE: How do increase memory allocated to MySQL?Jerry Schwartz4 Feb
      • Re: How do increase memory allocated to MySQL?Kevin Spencer5 Feb
        • Re: How do increase memory allocated to MySQL?Feris Thia5 Feb
RE: How do increase memory allocated to MySQL?David Brian Chait4 Feb