[Mongrel] Memory Leaks with Rails 1.2?

Alexey Verkhovsky alexey.verkhovsky at gmail.com
Wed Mar 7 13:41:56 EST 2007

I'm researching Rails deployment, anyway, so I'll do some poking around.


On 3/7/07, Zed A. Shaw <zedshaw at zedshaw.com> wrote:
> I've been getting a bunch of reports about the latest Rails "leaking"
> memory more than before.  Please fill out this survey:
> 1) Have you noticed an increase in memory usage with the latest Rails
> 1.2?
> 2) Have you changed anything else in your application?
>    a) No, really, don't be a dumbass like the lusers you hate. Go look
> at your svn logs and really figure out if you've changed anything else.
> 3) I ask again, did you change anything else since as well as Rails 1.2?
> 4) Does going back to a previous Rails (if you can) get rid of the
> memory leak?
> 5) Have you tried taking a basic controller that renders :text =>
> "test" only and run sequential hits against it?
>    a) Does the ram increase?
>    b) If not, have run this same test against a page that does?
>    c) What's the difference between the leaking and non-leaking page?
> 6) Do you have this problem with FastCGI?
> 7) Do you have this problem if you add a GC.start call to the end of
> your leaking requests, or as an after filter in a strategic location?
> Thanks, please keep the response short so I can start looking for
> patterns.
> In my tests I'm not finding any leaks so I need more information.
> Reproducible processes and sample code will really help a lot.
> --
> Zed A. Shaw, MUDCRAP-CE Master Black Belt Sifu
> http://www.zedshaw.com/
> http://www.awprofessional.com/title/0321483502 -- The Mongrel Book
> http://mongrel.rubyforge.org/
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