Hi,
can anybody tell me what is the computational complexity of
external sorting algorithm used by postgres in terms of time and space.
And one more question is how does # of DISK I/O's vary by varying jsf and
size of data while using external sorting algorithms to sort(I mean is it
like linea
hai...
I have installed postgresql from sourcecode.I would like to know
how pages are replaced in the bufferpool when we join two relations.I
tried to trace it by editing files
pgsql/src/backend/storage/buffer/(bufmgr.c,freelist.c).But i feel still I
am missing some information after ob
On Fri, 8 Sep 2006, Heikki Linnakangas wrote:
Date: Fri, 08 Sep 2006 14:30:01 +0100
From: Heikki Linnakangas <[EMAIL PROTECTED]>
To: Praveen Kumar N <[EMAIL PROTECTED]>
Cc: pgsql-hackers@postgresql.org
Subject: Re: [HACKERS] postgresql shared buffers
Praveen Kumar N wrote:
ri, 08 Sep 2006 14:57:57 +0100
From: Heikki Linnakangas <[EMAIL PROTECTED]>
To: Praveen Kumar N <[EMAIL PROTECTED]>
Cc: pgsql-hackers@postgresql.org
Subject: Re: [HACKERS] postgresql shared buffers
Praveen Kumar N wrote:
Let me explain once more.
I have two relations which are 10 times
On Fri, 8 Sep 2006, Heikki Linnakangas wrote:
Date: Fri, 08 Sep 2006 15:22:19 +0100
From: Heikki Linnakangas <[EMAIL PROTECTED]>
To: Praveen Kumar N <[EMAIL PROTECTED]>
Cc: pgsql-hackers@postgresql.org
Subject: Re: [HACKERS] postgresql shared buffers
Praveen Kumar N wrote:
Foll
Fri, 08 Sep 2006 15:30:37 +0100
From: Heikki Linnakangas <[EMAIL PROTECTED]>
To: Praveen Kumar N <[EMAIL PROTECTED]>
Cc: pgsql-hackers@postgresql.org
Subject: Re: [HACKERS] postgresql shared buffers
Praveen Kumar N wrote:
On Fri, 8 Sep 2006, Heikki Linnakangas wrote:
Looks like Alvaro
Hi,
can anybody explain me what is the difference between system cache
and buffer cache?
I found that keywords in PostgreSql FAQ
http://www.postgresql.org/docs/faqs.FAQ_DEV.html#item2.1
thanks in advance.
Regards,
--
N Praveen Kumar
Imagination is more important than knowledge...
Buffer cache is implemented using bufferpool right(I mean in the main
memory).how about system cache? Can we control the size of system cache?
On Tue, 19 Sep 2006, Heikki Linnakangas wrote:
System cache is a per-row cache of system catalog tables. It's used to speed
up lookup of things like
