Comments on: Phusion Passenger and memcache-client revisited

By: Michael

Michael — Tue, 25 Aug 2009 05:20:00 +0000

Hey Aaron, i think that’s correct.

By: Aaron Gibralter

Aaron Gibralter — Mon, 24 Aug 2009 21:37:42 +0000

So it would seem like both the Rails.cache MemCache object and the ActionController::Base.session_options[:cache] (if you’re using memcached) would need to be reset in the block, right?

http://gist.github.com/174221

By: Clive

Clive — Fri, 07 Aug 2009 15:15:12 +0000

For Rails 2.2.2,reestablish_connection_to_memcached method should be
Rails.cache.instance_variable_get(’@data’).reset

By: Creating a self containing mvc application with Sinatra | info.michael-simons.eu

Wed, 29 Jul 2009 08:23:14 +0000

[...] wait. I’ve written before about problems with memcache-client and Passenger and this problems needs to be addressed in a Rails as well as Rack [...]

By: Michael

Michael — Thu, 23 Jul 2009 19:37:39 +0000

Hello Ian,
thank you very much for that nice comment!

Its actually in the passenger docs…

Regarding your second question: Connection from the Passenger process to memcache is done via a socket which is actually a file descriptor. This descriptor is copied when forking a new process with shared memory and both write and read to and from the exact same socket and it goes *boom*

As long as you connect to the database via tcp i’d say you’re safe. I guess that problems will arive, if you use a socket connection to mysql. I have no idea how sqlite connections are handled.

By: Ian Neubert

Ian Neubert — Thu, 23 Jul 2009 19:32:10 +0000

Thank you for this tutorial, it should be included in the Passenger docs!

As a side question, does anyone know if you need to go through a similar process on the ActiveRecord connection to the database?

Thanks!

By: Michael

Michael — Wed, 08 Jul 2009 19:42:15 +0000

Hey Alex,
sorry that i had no answer for and thank you for your input!
Cheers,
Michael

By: Alex Farrill

Alex Farrill — Wed, 08 Jul 2009 19:38:44 +0000

Am using this:

Rails.cache.instance_variable_get(‘@cache’).reset

for my reestablish_connection_to_memcached method

In case it is useful to anyone else
peace,
Alex

By: Alex Farrill

Alex Farrill — Tue, 07 Jul 2009 19:48:03 +0000

Anyone have any insight into using this with Libmemcached as the cache store?
Thanks,
Alex

By: Michael

Michael — Wed, 06 May 2009 13:17:20 +0000

Arthur: You’re welcome and i’m glad, your problem is solved. Thanks for nice comment on your blog!

Cheers,
Michael.