Where to set @@allow_concurrency= true

Rails
1

Hi all,
I would like to have a connection-per-thread in my rails app. According
to the base.rb file, @@allow_concurrency parameter mustbe set to true.
I tried setting it both in environment.rb and ApplicationController but
did not work. Where should I change that parameter so that it can work?

Thanks.

Ayhan

2

That kind of configuration should go in config/environment.rb, though
you
can’t just do ‘@@allow_concurrency = true’ in the Initializer block. I’m
not
sure where this var is, I think ActiveRecord, so this would be the line
you
add (I’m pretty sure):

Rails::Initializer do
…
config.active_record.allow_concurency = true
…
end

Jason

3

On Aug 28, 2006, at 7:59 AM, Jason R. wrote:

did not work. Where should I change that parameter so that it can
work?

Thanks.

Ayhan

Can you explain what you mean by "I would like to have a connection-

per-thread in my rails app" ? Rails doesn’t work that way as th
framework as a whole is not thread safe> So when it is served by
mongrel , webrick or fcgi, requests are serialized when they are
dispatched to rails so that only one runs at a time. So setting
allow_concurrency= true in a normal rails app will not get you
anything. If you explain what you are trying to do I amy be able to
shed some more light on it for you.;

-Ezra

4

Thanks for your replies.
In my tests in webrick server I found that all the threads are sharing
a single database conenction. But I would like each thread to have its
own connection.

I solved that with Jason’s advice by doing the the following in
environment.rb

Rails::Initializer.run do |config|
config.active_record.allow_concurrency = true
end

Thanks.