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Re: Windows 2000 Slower Than Windows XP (SOLVED)

From: "Quinton Lawson" <qlawson(at)adelphia(dot)net>
To: <pgsql-general(at)postgresql(dot)org>
Subject: Re: Windows 2000 Slower Than Windows XP (SOLVED)
Date: 2005-01-23 04:25:30
Message-ID: 000901c50103$946d2e00$6501a8c0@travis (view raw, whole thread or download thread mbox)
Lists: pgsql-docspgsql-general
Thank you Joe for leading me in the right direction.  I found the solution to the problem.  It wasn't a hardware related problem or an OLE DB driver problem...  

By default, Windows XP installs the QoS Packet Scheduler service.  It is not installed by default on Windows 2000.  After I installed QoS Packet Scheduler on the Windows 2000 machine, the latency problem vanished.

I am a happy PostgreSQL user now :)


  ----- Original Message ----- 
  From: Joe Audette 
  To: pgsql-general(at)postgresql(dot)org 
  Sent: Saturday, January 22, 2005 9:47 PM
  Subject: Re: [GENERAL] Windows 2000 Slower Than Windows XP

  Sounds like it could be a networking issue to me.
  Perhaps the xp machine is resolving the db server name
  more efficiently.
  do both the xp machine and the win2k machine
  1 have comparable network cards?
  2 on the same subnet as each other and the db?
  3 using the same dns or wins server?

  you could try putting an entry in the hosts file on
  the slow machine to resolve the name of the db machine
  and see if that helps.

  I'm no expert on Postgre SQL so maybe there is a
  driver difference or something that others on the list
  would know better.

  Hope that helps,


  --- Quinton Lawson <qlawson(at)adelphia(dot)net> wrote:

  > I have been having quite a time trying to figure
  > this one out.  I have installed PostgreSQL OLE DB
  > drivers (ver on two separate machines. 
  > The only difference between the two machines is the
  > OS, 2000 Pro (SP4) and XP Pro (SP2) and both are
  > fully updated from fresh installs.  The PostgreSQL
  > 8.0 server is running on another Windows XP Pro
  > machine (SP2, fully updated).
  > I am performing a Select query like this: 
  > SELECT column1, column2, column3 FROM table1 WHERE
  > column4 = 'value1' AND column5 ='value2' ORDER BY
  > column1, column2;
  > Connection String:
  > Provider=PostgreSQL.1;Password="";User
  > ID=client1;Data Source=server;Location=Media
  > Database;Extended Properties=""
  > The results take approximately 2 seconds on the XP
  > machine and 8 seconds on the 2000 machine.
  > Explain Analyze yields nearly identical times (45ms)
  > between the two.
  > Any ideas why this is occuring?
  > Thank You,
  > qlawson


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