On Thu, 30 Jun 2011 07:10:43 -0600, "mark" <dvlhntr(at)gmail(dot)com> wrote:
> 
> That might be a ok on a small application with a limited number of users. A
> few thousand login attempts per min and you are probably going to wish the
> counter lived outside of your RDBMS. 
As pg is able to sustain large loads, I don't see why.  But you can
externalize if you want, using dblink.
-- 
The weed of crime bears bitter fruit... but the leaves are good to smoke!
		-- The Shadow