Re: PostgreSQL vs. InnoDB performance

Peter Eisentraut wrote:
> On a particular system, loading 1 million rows (100 bytes, nothing
> fancy) into PostgreSQL one transaction at a time takes about 90
> minutes.


Doing the same in MySQL/InnoDB takes about 3 minutes.  InnoDB
> is supposed to have a similar level of functionality as far as the
> storage manager is concerned, so I'm puzzled about how this can be.
> Does anyone know whether InnoDB is taking some kind of questionable
> shortcuts it doesn't tell me about?

What about fsync/opensync and wal segments?

What happens if we turn off fsync entirely?


  The client interface is DBI.  This
> particular test is supposed to simulate a lot of transactions happening
> in a short time, so turning off autocommit is not relevant.
>
> As you might imagine, it's hard to argue when the customer sees these
> kinds of numbers.  So I'd take any FUD I can send back at them. :)
>


--
Your PostgreSQL solutions company - Command Prompt, Inc. 1.800.492.2240
PostgreSQL Replication, Consulting, Custom Programming, 24x7 support
Managed Services, Shared and Dedicated Hosting
Co-Authors: plPHP, plPerlNG - http://www.commandprompt.com/