Message-ID: <4CF682A7.4030109@vmsinfo.com>
Date: Wed, 01 Dec 2010 12:15:19 -0500
From: Mladen Gogala <mladen.gogala@vmsinfo.com>
Organization: VMS
User-Agent: Thunderbird 2.0.0.24 (X11/20101027)
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To: Mario Splivalo <mario.splivalo@megafon.hr>
CC: "jd@commandprompt.com" <jd@commandprompt.com>,
	"pgsql-performance@postgresql.org" <pgsql-performance@postgresql.org>
Subject: Re: SELECT INTO large FKyed table is slow
References: <4CF24103.8030209@megafon.hr>
	<1291168052.20631.1963.camel@jd-desktop>
	<4CF5FF0A.9040605@megafon.hr> <4CF678FC.9050003@vmsinfo.com>
	<4CF67F2A.4070703@megafon.hr>
In-Reply-To: <4CF67F2A.4070703@megafon.hr>
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Mario Splivalo wrote:
> I'll try what Pierre suggested, on whole new filesystem. This one did 
> get quite filled with thousands of files that I deleted while the 
> database was working.
>
> 	Mario
>   

Yes, that is a good idea. That's the reason why we need a 
defragmentation tool on Linux. Unfortunately, the only file system that 
currently has a decent defragmentation tool is XFS and that is a paid 
option, at least with Red Hat. Greg Smith has recently posted a 
wonderful review of PostgreSQL on various file systems:

http://blog.2ndquadrant.com/en/2010/04/the-return-of-xfs-on-linux.html

There is a operating system which comes with a very decent extent based 
file system and a defragmentation tool, included in the OS. The file 
system is called "NTFS" and company is in the land of Redmond, WA where 
the shadows lie. One OS to rule them all...

-- 
 
Mladen Gogala 
Sr. Oracle DBA
1500 Broadway
New York, NY 10036
(212) 329-5251
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