Re: Proposal of tunable fix for scalability of 8.4

From: Simon Riggs
Subject: Re: Proposal of tunable fix for scalability of 8.4
Date: ,
Msg-id: 1237037402.3963.36.camel@ebony.2ndQuadrant
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In response to: Proposal of tunable fix for scalability of 8.4  ("Jignesh K. Shah")
Responses: Re: Proposal of tunable fix for scalability of 8.4  ("Jignesh K. Shah")
List: pgsql-performance

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Proposal of tunable fix for scalability of 8.4  ("Jignesh K. Shah", )
 Re: Proposal of tunable fix for scalability of 8.4  ("Kevin Grittner", )
  Re: Proposal of tunable fix for scalability of 8.4  ("Jignesh K. Shah", )
   Re: Proposal of tunable fix for scalability of 8.4  ("Kevin Grittner", )
  Re: Proposal of tunable fix for scalability of 8.4  (Tom Lane, )
   Re: Proposal of tunable fix for scalability of 8.4  ("Jignesh K. Shah", )
    Re: Proposal of tunable fix for scalability of 8.4  (Simon Riggs, )
     Re: Proposal of tunable fix for scalability of 8.4  ("Jignesh K. Shah", )
     Re: Proposal of tunable fix for scalability of 8.4  ("Jignesh K. Shah", )
      Re: Proposal of tunable fix for scalability of 8.4  (Simon Riggs, )
       Re: Proposal of tunable fix for scalability of 8.4  ("Jignesh K. Shah", )
        Re: Proposal of tunable fix for scalability of 8.4  (Simon Riggs, )
        Re: Proposal of tunable fix for scalability of 8.4  (Gregory Stark, )
         Re: Proposal of tunable fix for scalability of 8.4  (Scott Carey, )
          Re: Proposal of tunable fix for scalability of 8.4  ("Jignesh K. Shah", )
  Re: Proposal of tunable fix for scalability of 8.4  (Scott Carey, )
   Re: Proposal of tunable fix for scalability of 8.4  (Tom Lane, )
    Re: Proposal of tunable fix for scalability of 8.4  ("Jignesh K. Shah", )
     Re: Proposal of tunable fix for scalability of 8.4  (decibel, )
      Re: Proposal of tunable fix for scalability of 8.4  ("Jignesh K. Shah", )
       Re: Proposal of tunable fix for scalability of 8.4  (Josh Berkus, )
    Re: Proposal of tunable fix for scalability of 8.4  (Scott Carey, )
     Re: Proposal of tunable fix for scalability of 8.4  ("Jignesh K. Shah", )
      Re: Proposal of tunable fix for scalability of 8.4  ("Kevin Grittner", )
      Re: Proposal of tunable fix for scalability of 8.4  (Scott Carey, )
       Re: Proposal of tunable fix for scalability of 8.4  ("Jignesh K. Shah", )
        Re: Proposal of tunable fix for scalability of 8.4  (Gregory Stark, )
         Re: Proposal of tunable fix for scalability of 8.4  ("Jignesh K. Shah", )
          Re: Proposal of tunable fix for scalability of 8.4  (Gregory Stark, )
         Re: Proposal of tunable fix for scalability of 8.4  (decibel, )
        Re: Proposal of tunable fix for scalability of 8.4  (Gregory Stark, )
        Re: Proposal of tunable fix for scalability of 8.4  ("Jignesh K. Shah", )
         Re: Proposal of tunable fix for scalability of 8.4  ("Kevin Grittner", )
          Re: Proposal of tunable fix for scalability of 8.4  (Scott Carey, )
           Re: Proposal of tunable fix for scalability of 8.4  ("Jignesh K. Shah", )
         Re: Proposal of tunable fix for scalability of 8.4  ("Kevin Grittner", )
         Re: Proposal of tunable fix for scalability of 8.4  ("Jignesh K. Shah", )
          Re: Proposal of tunable fix for scalability of 8.4  (Scott Carey, )
           Re: Proposal of tunable fix for scalability of 8.4  (Scott Carey, )
            Re: Proposal of tunable fix for scalability of 8.4  ("Jignesh K. Shah", )
          Re: Proposal of tunable fix for scalability of 8.4  ("Jignesh K. Shah", )
           Re: Proposal of tunable fix for scalability of 8.4  (decibel, )
            Re: Proposal of tunable fix for scalability of 8.4  ("Jignesh K. Shah", )
             Re: Proposal of tunable fix for scalability of 8.4  (Gregory Stark, )
              Re: Proposal of tunable fix for scalability of 8.4  ("Jignesh K. Shah", )
      Re: Proposal of tunable fix for scalability of 8.4  (Greg Smith, )
   Re: Proposal of tunable fix for scalability of 8.4  ("Jignesh K. Shah", )
    Re: Proposal of tunable fix for scalability of 8.4  (Scott Carey, )
    Re: Proposal of tunable fix for scalability of 8.4  (Greg Smith, )
     Re: Proposal of tunable fix for scalability of 8.4  (Scott Carey, )
      Re: Proposal of tunable fix for scalability of 8.4  (Robert Haas, )
       Re: Proposal of tunable fix for scalability of 8.4  (Tom Lane, )
        Re: Proposal of tunable fix for scalability of 8.4  (Scott Carey, )
        Re: Proposal of tunable fix for scalability of 8.4  ("Kevin Grittner", )
         Re: Proposal of tunable fix for scalability of 8.4  (Scott Carey, )
         Re: Proposal of tunable fix for scalability of 8.4  (, )
          Re: Proposal of tunable fix for scalability of 8.4  ("Kevin Grittner", )
           Re: Proposal of tunable fix for scalability of 8.4  ("Kevin Grittner", )
            Re: Proposal of tunable fix for scalability of 8.4  (Scott Carey, )
        Re: Proposal of tunable fix for scalability of 8.4  (Heikki Linnakangas, )
         Re: Proposal of tunable fix for scalability of 8.4  (Tom Lane, )
          Re: Proposal of tunable fix for scalability of 8.4  (Scott Carey, )
          Re: Proposal of tunable fix for scalability of 8.4  (Simon Riggs, )
         Re: Proposal of tunable fix for scalability of 8.4  (Matthew Wakeling, )
          Re: Proposal of tunable fix for scalability of 8.4  (Simon Riggs, )
           Re: Proposal of tunable fix for scalability of 8.4  (Matthew Wakeling, )
            Re: Proposal of tunable fix for scalability of 8.4  (Simon Riggs, )
             Re: Proposal of tunable fix for scalability of 8.4  (Matthew Wakeling, )
             Re: Proposal of tunable fix for scalability of 8.4  ("Jignesh K. Shah", )
              Re: Proposal of tunable fix for scalability of 8.4  (Matthew Wakeling, )
               Re: Proposal of tunable fix for scalability of 8.4  (Simon Riggs, )
           Re: Proposal of tunable fix for scalability of 8.4  (Tom Lane, )
            Re: Proposal of tunable fix for scalability of 8.4  (Simon Riggs, )
           Re: Proposal of tunable fix for scalability of 8.4  (Scott Carey, )
            Re: Proposal of tunable fix for scalability of 8.4  (Matthew Wakeling, )
             Re: Proposal of tunable fix for scalability of 8.4  (Tom Lane, )
             Re: Proposal of tunable fix for scalability of 8.4  (Scott Carey, )
             Re: Proposal of tunable fix for scalability of 8.4  (Simon Riggs, )
          Re: Proposal of tunable fix for scalability of 8.4  (Heikki Linnakangas, )
           Re: Proposal of tunable fix for scalability of 8.4  (Matthew Wakeling, )
       Re: Proposal of tunable fix for scalability of 8.4  (Scott Carey, )
        Re: Proposal of tunable fix for scalability of 8.4  (Robert Haas, )
         Re: Proposal of tunable fix for scalability of 8.4  ("Jignesh K. Shah", )
          Re: Proposal of tunable fix for scalability of 8.4  (Robert Haas, )
           Re: Proposal of tunable fix for scalability of 8.4  (Scott Carey, )
            Re: Proposal of tunable fix for scalability of 8.4  (Robert Haas, )
             Re: Proposal of tunable fix for scalability of 8.4  (Scott Carey, )
              Re: Proposal of tunable fix for scalability of 8.4  (Alvaro Herrera, )
               Re: Proposal of tunable fix for scalability of 8.4  (Alvaro Herrera, )
                Re: Proposal of tunable fix for scalability of 8.4  (Alvaro Herrera, )
                 Re: Proposal of tunable fix for scalability of 8.4  ("Jignesh K. Shah", )
                  Re: Proposal of tunable fix for scalability of 8.4  (Robert Haas, )
                   Re: Proposal of tunable fix for scalability of 8.4  ("Jignesh K. Shah", )
           Re: Proposal of tunable fix for scalability of 8.4  ("Jignesh K. Shah", )
         Re: Proposal of tunable fix for scalability of 8.4  (Bruce Momjian, )
          Re: Proposal of tunable fix for scalability of 8.4  (Scott Carey, )
           Re: Proposal of tunable fix for scalability of 8.4  (Bruce Momjian, )
         Re: Proposal of tunable fix for scalability of 8.4  (Scott Carey, )
      Re: Proposal of tunable fix for scalability of 8.4  (Greg Smith, )
     8.4 Performance improvements: was Re: Proposal of tunable fix for scalability of 8.4  ("Jignesh K. Shah", )
      Re: 8.4 Performance improvements: was Re: Proposal of tunable fix for scalability of 8.4  (Gregory Stark, )
      Re: 8.4 Performance improvements: was Re: Proposal of tunable fix for scalability of 8.4  (Gregory Stark, )
       Re: 8.4 Performance improvements: was Re: Proposal of tunable fix for scalability of 8.4  (Alan Stange, )
        Re: 8.4 Performance improvements: was Re: Proposal of tunable fix for scalability of 8.4  (Tom Lane, )
         Re: 8.4 Performance improvements: was Re: Proposal of tunable fix for scalability of 8.4  (Gregory Stark, )
          Re: 8.4 Performance improvements: was Re: Proposal of tunable fix for scalability of 8.4  (Tom Lane, )
           Re: 8.4 Performance improvements: was Re: Proposal of tunable fix for scalability of 8.4  (Robert Haas, )
            Re: 8.4 Performance improvements: was Re: Proposal of tunable fix for scalability of 8.4  (Gregory Stark, )
            Re: 8.4 Performance improvements: was Re: Proposal of tunable fix for scalability of 8.4  (Tom Lane, )
           Re: 8.4 Performance improvements: was Re: Proposal of tunable fix for scalability of 8.4  (Bruce Momjian, )
            Re: 8.4 Performance improvements: was Re: Proposal of tunable fix for scalability of 8.4  (Bruce Momjian, )
      Re: 8.4 Performance improvements: was Re: Proposal of tunable fix for scalability of 8.4  (Greg Smith, )
   Re: Proposal of tunable fix for scalability of 8.4  ("Kevin Grittner", )
    Re: Proposal of tunable fix for scalability of 8.4  (Grzegorz Jaśkiewicz, )
     Re: Proposal of tunable fix for scalability of 8.4  ("Kevin Grittner", )
      Re: Proposal of tunable fix for scalability of 8.4  (Ron, )
     Re: Proposal of tunable fix for scalability of 8.4  (Gregory Stark, )
      Re: Proposal of tunable fix for scalability of 8.4  (Scott Carey, )
    Re: Proposal of tunable fix for scalability of 8.4  (Scott Carey, )
     Re: Proposal of tunable fix for scalability of 8.4  (Tom Lane, )
      Re: Proposal of tunable fix for scalability of 8.4  (Alvaro Herrera, )
       Re: Proposal of tunable fix for scalability of 8.4  ("Jignesh K. Shah", )
        Re: Proposal of tunable fix for scalability of 8.4  (decibel, )
      Re: Proposal of tunable fix for scalability of 8.4  (Scott Carey, )
    Re: Proposal of tunable fix for scalability of 8.4  (Tom Lane, )
     Re: Proposal of tunable fix for scalability of 8.4  (Scott Carey, )
    Re: Proposal of tunable fix for scalability of 8.4  ("Jignesh K. Shah", )
 Re: Proposal of tunable fix for scalability of 8.4  (Simon Riggs, )
  Re: Proposal of tunable fix for scalability of 8.4  ("Jignesh K. Shah", )

On Wed, 2009-03-11 at 16:53 -0400, Jignesh K. Shah wrote:

> 1200: 2000: Medium Throughput: -1781969.000 Avg Medium Resp: 0.019

I think you need to iron out bugs in your test script before we put too
much stock into the results generated. Your throughput should not be
negative.

I'd be interested in knowing the number of S and X locks requested, so
we can think about this from first principles. My understanding is that
ratio of S:X is about 10:1. Do you have more exact numbers?

--
 Simon Riggs           www.2ndQuadrant.com
 PostgreSQL Training, Services and Support



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