Re: Pulling data from a constraint def - Mailing list pgsql-general

From Josh Kupershmidt
Subject Re: Pulling data from a constraint def
Date
Msg-id AANLkTikiPzi2O3uwesdC5Lvtrd0Pj-7aaFSDdvLVkgNO@mail.gmail.com
Whole thread Raw
In response to Re: Pulling data from a constraint def  (David Fetter <david@fetter.org>)
Responses Re: Pulling data from a constraint def  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-general
On Wed, May 12, 2010 at 12:58 AM, David Fetter <david@fetter.org> wrote:
> If you've measured a performance issue for a table that tiny, it's a
> bug that needs fixing in PostgreSQL.  What measurements have you done
> so far?

Just for fun, I tried it out myself. Here are the times I got on my
modest laptop:

CHECK constraint:
 * 500k INSERTs: 3.8 seconds
 * 500k UPDATEs: 6.0 seconds

Foreign Key:
 * 500k INSERTs: 18.7 seconds
 * 500k UPDATEs: 21.2 seconds

Test SQL is attached.

Josh

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