From: Eric Hodel <drbrain@...7.net>
Date: 2004-02-13T15:39:21-08:00
Subject: Re: Borges/Iowa resource usage

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Avi Bryant (avi@beta4.com) wrote:

> > How does Iowa store each continuation stack (which is my own, uneducate=
d=20
> > term -- same thing as the resident set size?) ? From my unscientific=20
> > checking of Borges, it seemed each continuation got its own place in=20
> > memory, so virtually every page visit triggered another usage chunk, an=
d=20
> > it seemed to grow very quickly with just one user. If Eric's reading=20
> > this (Borges author), maybe he can chime in with some more specifics.
>=20
> Iowa (at least back when I first wrote it ;) doesn't use
> continuations, although it's still resource intensive compared to many
> alternatives, because it stores a bunch of state for each page view.=20
> But as Kirk shows, it stays within acceptable limits.
>=20
> Chad Fowler and I were looking into Borges resource usage earlier
> today, and it seems to be out of control - Chad was seeing about an
> extra 1MB (!) of resident size per page view.

There is a version of Borges floating about with a broken LRUCache.  It
will consume approximately 1MB per page view, and never let go (ouch!).

See:

http://216.254.21.90/cgi-bin/cvsweb.cgi/ruby/seaside2/Borges/lib/Borges/Uti=
lities/LRUCache.rb

Around christmass time I lost alot of traction on programming projects
(mostly due to laziness combined with a dead laptop HDD), but now that
I've resurrected it, I'll have to push Borges out the door.

--=20
Eric Hodel - drbrain@segment7.net - http://segment7.net
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