Re: performance for high-volume log insertion

From: Stephen Frost
Subject: Re: performance for high-volume log insertion
Date: ,
Msg-id: 20090422203703.GH8123@tamriel.snowman.net
(view: Whole thread, Raw)
In response to: Re: performance for high-volume log insertion  (Glenn Maynard)
Responses: Re: performance for high-volume log insertion  (Tom Lane)
Re: performance for high-volume log insertion  (Glenn Maynard)
List: pgsql-performance

Tree view

performance for high-volume log insertion  (, )
 Re: performance for high-volume log insertion  (Stephen Frost, )
  Re: performance for high-volume log insertion  (, )
   Re: performance for high-volume log insertion  (Stephen Frost, )
    Re: performance for high-volume log insertion  (, )
     Re: performance for high-volume log insertion  (Stephen Frost, )
      Re: performance for high-volume log insertion  (, )
       Re: performance for high-volume log insertion  (Stephen Frost, )
        Re: performance for high-volume log insertion  (, )
       Re: performance for high-volume log insertion  (Ben Chobot, )
        Re: performance for high-volume log insertion  (Stephen Frost, )
         Re: performance for high-volume log insertion  (, )
          Re: performance for high-volume log insertion  (Stephen Frost, )
           Re: performance for high-volume log insertion  (, )
            Re: performance for high-volume log insertion  (, )
             Re: performance for high-volume log insertion  (Stephen Frost, )
            Re: performance for high-volume log insertion  (Stephen Frost, )
   Re: performance for high-volume log insertion  (Greg Smith, )
    Re: performance for high-volume log insertion  (Stephen Frost, )
     Re: performance for high-volume log insertion  (, )
      Re: performance for high-volume log insertion  (Stephen Frost, )
    Re: performance for high-volume log insertion  (, )
     Re: performance for high-volume log insertion  (Stephen Frost, )
      Re: performance for high-volume log insertion  (, )
       Re: performance for high-volume log insertion  (Richard Huxton, )
        Re: performance for high-volume log insertion  (Kenneth Marshall, )
         Re: performance for high-volume log insertion  (, )
          Re: performance for high-volume log insertion  (Kenneth Marshall, )
     Re: performance for high-volume log insertion  (Greg Smith, )
      Re: performance for high-volume log insertion  (, )
       Re: performance for high-volume log insertion  (Kenneth Marshall, )
       Re: performance for high-volume log insertion  (Greg Smith, )
   Re: performance for high-volume log insertion  (James Mansion, )
    Re: performance for high-volume log insertion  (Stephen Frost, )
     Re: performance for high-volume log insertion  (, )
      Re: performance for high-volume log insertion  (Robert Haas, )
      Re: performance for high-volume log insertion  (Stephen Frost, )
       Re: performance for high-volume log insertion  (Glenn Maynard, )
        Re: performance for high-volume log insertion  (, )
         Re: performance for high-volume log insertion  (Glenn Maynard, )
        Re: performance for high-volume log insertion  (Stephen Frost, )
         Re: performance for high-volume log insertion  (Tom Lane, )
         Re: performance for high-volume log insertion  (Glenn Maynard, )
          Re: performance for high-volume log insertion  (Stephen Frost, )
           Re: performance for high-volume log insertion  (Glenn Maynard, )
            Re: performance for high-volume log insertion  (Stephen Frost, )
             Re: performance for high-volume log insertion  (Glenn Maynard, )
              Re: performance for high-volume log insertion  (Stephen Frost, )
             Re: performance for high-volume log insertion  (, )
              Re: performance for high-volume log insertion  (Stephen Frost, )
           Re: performance for high-volume log insertion  (Thomas Kellerer, )
            Re: performance for high-volume log insertion  (Kris Jurka, )
             Re: performance for high-volume log insertion  (Thomas, )
             Re: performance for high-volume log insertion  (Scott Marlowe, )
              Re: performance for high-volume log insertion  (Kris Jurka, )
               Re: performance for high-volume log insertion  (Scott Marlowe, )
               Re: performance for high-volume log insertion  (, )
     Re: performance for high-volume log insertion  (James Mansion, )
      Re: performance for high-volume log insertion  (Stephen Frost, )
       Re: performance for high-volume log insertion  (James Mansion, )
        Re: performance for high-volume log insertion  ("Joshua D. Drake", )
        Re: performance for high-volume log insertion  (Glenn Maynard, )
         Re: performance for high-volume log insertion  (, )
          Re: performance for high-volume log insertion  (Stephen Frost, )
         Re: performance for high-volume log insertion  (PFC, )
          Re: performance for high-volume log insertion  (, )
          Re: performance for high-volume log insertion  (Glenn Maynard, )
 Re: performance for high-volume log insertion  (Simon Riggs, )

Glenn,

* Glenn Maynard () wrote:
> This is all well-known, covered information, but perhaps some numbers
> will help drive this home.  40000 inserts into a single-column,
> unindexed table; with predictable results:

Thanks for doing the work.  I had been intending to but hadn't gotten to
it yet.

> separate inserts, no transaction: 21.21s
> separate inserts, same transaction: 1.89s
> 40 inserts, 100 rows/insert: 0.18s
> one 40000-value insert: 0.16s
> 40 prepared inserts, 100 rows/insert: 0.15s
> COPY (text): 0.10s
> COPY (binary): 0.10s

What about 40000 individual prepared inserts?  Just curious about it.

Also, kind of suprised about COPY text vs. binary.  What was the data
type in the table..?  If text, that makes sense, if it was an integer or
something else, I'm kind of suprised.

    Thanks,

        Stephen

Attachment

pgsql-performance by date:

From: Glenn Maynard
Date:
Subject: Re: performance for high-volume log insertion
From: david@lang.hm
Date:
Subject: Re: performance for high-volume log insertion