Skype, perhaps the largest telephony app in the world, uses Postgresql.
Here's some info on their postgresql usage:
http://highscalability.com/skype-plans-postgresql-scale-1-billion-users
https://developer.skype.com/SkypeGarage/DbProjects/SkypePostgresqlWhitepaper
--- On Sat, 5/1/10, Thomas Løcke <thomas.granvej6@gmail.com> wrote:
> From: Thomas Løcke <thomas.granvej6@gmail.com>
> Subject: [GENERAL] PostgreSQL vs. Microsoft SQL server
> To: pgsql-general@postgresql.org
> Date: Saturday, May 1, 2010, 2:47 PM
> Anybody know of any recent
> comparisons made between the two?
>
> I'm in the process of buying a new telephony related
> software suite,
> and I'm getting mixed advice. Some say that MSSQL is
> _much_
> better/faster than PostgreSQL, and others say the
> opposite.
>
> The vendor is more or less indifferent, with a small plus
> to the
> Microsoft solution because, well, they are a Microsoft
> shop. The
> sales-people all bang on about MSSQL being the superior
> choice, and
> PostgreSQL being a "toy compared to the Microsoft RDBMS".
> The tech
> people though are divided into three groups: One group says
> the two
> systems are more or less equal, another group who says the
> Microsoft
> database is superior and finally a group who speaks highly
> of
> PostgreSQL.
>
> I've not been able to convince them to send me some actual
> benchmark
> numbers, which actually should turn on quite a few alarms,
> come to
> think about it. :o)
>
> Maybe you guys are aware of some recent generic
> tests/comparisons
> between the two systems?
>
> Regards,
> Thomas
>
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