Comments on: Scaling ActiveRecord with MySQLPlus

By: roger

roger — Mon, 22 Jun 2009 18:41:50 +0000

it seems stable–I’ve never been able to get all the rails tests to run with the *normal* mysql but I think they’d pass all right.

By: Steve

Steve — Mon, 22 Jun 2009 18:32:12 +0000

Hey so it’s been awhile since this article has been released, and it now appears that oldmoe’s branch of mysqlplus IS functioning as a drop-in replacement for the standard mysql gem for ActiveRecord. (or at least, that’s what the readme implies)…

could someone verify whether or not this is true? Does mysqlplus now hold up under rigorous testing with ActiveRecord now?

By: Fibers & Cooperative Scheduling in Ruby - igvita.com

Fibers & Cooperative Scheduling in Ruby - igvita.com — Wed, 13 May 2009 17:44:16 +0000

[...] the functionality of Fibers to Ruby 1.8.(6|7), and also provide a great example of converting the asynchronous MySQL driver to work in synchronous fashion. Looking for more? Take a look at an implementation of Futures in [...]

By: eSpace an Arab Pioneer in Open Source Contribution. | ArabCrunch

eSpace an Arab Pioneer in Open Source Contribution. | ArabCrunch — Mon, 09 Feb 2009 07:03:27 +0000

[...] was released in Q3 2008, and took the attention of the ROR community for example see: RubyInside, igtiva and [...]

By: roger

roger — Sun, 08 Feb 2009 01:50:20 +0000

It should work you’d just need to install the gem from within REE, as well.

By: Jackson Miller

Jackson Miller — Sun, 08 Feb 2009 01:33:12 +0000

Do you know if anyone has tested under Passenger with Enterprise Ruby?

By: Rails Database Connection with Block | Chasing

Rails Database Connection with Block | Chasing — Fri, 05 Dec 2008 04:40:05 +0000

[...] I am going to write about this because I planned to before realizing that in Rails 2.2 the exact same issue is solved already with a much better implementation (of course). You can find how to solve this problem very elegantly in Rails 2.2 at http://www.igvita.com/2008/10/27/scaling-activerecord-with-mysqlplus/. [...]

By: First version of rails with threat safety is here « Maulana Ruby

First version of rails with threat safety is here « Maulana Ruby — Sat, 22 Nov 2008 15:14:30 +0000

[...] ruby intrpreter from calling these libraries with multiple threads. One answer to this problem is Mysql Plus library which uses never block [...]

By: roger

roger — Sat, 08 Nov 2008 04:43:59 +0000

Yeah–Lourens’ mysqlplus adapter worked for me like a champ with threaded mysql.[1]

I wouldn’t imagine that having to worry about EAGAIN–is it even accomodated for in the current mysql? I doubt it would become a problem as the pool is limited.
I suppose if it became a problem then maybe running select to ensure writability before hand might help.

[1] http://betterlogic.com/roger/
[2] http://betterlogic.com/roger/?p=465

By: Lourens

Lourens — Sat, 08 Nov 2008 01:44:33 +0000

@Todd,

Correct - also mentioned in the footer of this post :

http://jan.kneschke.de/2008/9/9/async-mysql-queries-with-c-api

It does however set :

mysql->last_used_con = mysql;

Which could perhaps be used in combination with vio_should_retry && vio_was_interrupted

Just a stab in the dark.

- Lourens