Re: MVCC cons - Mailing list pgsql-general

From Kenneth Downs
Subject Re: MVCC cons
Date
Msg-id 46C203DB.7030605@secdat.com
Whole thread Raw
In response to Re: MVCC cons  (Tom Lane <tgl@sss.pgh.pa.us>)
Responses Re: MVCC cons  (Ron Johnson <ron.l.johnson@cox.net>)
List pgsql-general
Tom Lane wrote:
Kenneth Downs <ken@secdat.com> writes: 
Speaking as an end-user, I can give only one I've ever seen, which is 
performance.  Because of MVCC, Postgres's write performance (insert and 
update) appears on my systems to be almost exactly linear to row size.  
Inserting 1000 rows into a table with row size 100 characters takes 
twice as long as inserting 1000 rows into a table with row size 50 
characters.   
Not sure why you'd think that's specific to MVCC.  It sounds like purely
an issue of disk write bandwidth.
		regards, tom lane 

I did not see this in MS SQL Server.

-- 
Kenneth Downs
Secure Data Software, Inc.
www.secdat.com    www.andromeda-project.org
631-689-7200   Fax: 631-689-0527
cell: 631-379-0010

pgsql-general by date:

Previous
From: "Phoenix Kiula"
Date:
Subject: Compound Indexes
Next
From: Tom Lane
Date:
Subject: Re: pqlib in c++: PQconnectStart PQconnectPoll