Thu 24 Apr 2008

32bit VS 64bit - what do you use?

Posted by Scoundrel under Admin-tips , Development , General

Hello my dear readers.

Today I have a question for all of you. What platforms (32bit or 64 bit) do you use for your servers with more than 4Gb RAM? I’m asking because recently we‘ve hit few really weird bugs in Linux kernels 2.6.18 to 2.6.22 and all those bugs were PAE-related. Now I’d really love to move all machines to 64-bit, but I’m in doubt because we don’t know too much about Rails stack (ruby, mongrel, haproxy) on 64-bit platforms (all our DB boxes are 64-bit of course).

So, please drop me a line if you have any experience (negative or positive) with Rails platform on 64-bit machines. I’d really appreciate your help.

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Sat 1 Dec 2007

Innodb Locks, ActiveRecord and acts_as_ferret Problem

Posted by Scoundrel under Databases , Development

Last few days one of our customers (one of the largest Ruby on Rails sites on the Net) was struggling to solve some really strange problem - once upon a time they were getting an error from ActiveRecord on their site:

(ActiveRecord::StatementInvalid) "Mysql::Error: Lock wait timeout exceeded; try restarting transaction: UPDATE some_table.....

They have innodb_lock_wait_timeout set to 20 seconds. After a few hours of looking for strange transactions we were decided to create s script to dump SHOW INNODB STATUS and SHOW FULL PROCESSLIST commands output to a file every 10 seconds to catch one of those moments when this error occurred.

Today we’ve got next error and started digging in our logs…

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Wed 30 Aug 2006

Looking For Optimal Solution: Ruby On Rails and Mongrel

Posted by Scoundrel under Development , Networks · русский

This article is part of “Looking For Optimal Solution” series, devoted to testing various Ruby On Rails deployment schemes and doing some simple benchmarks on these schemes. General idea of testing is to find subset of most optimal RoR deployment schemes for different situations.

This small article is about Rails+Mongrel setup and its performance. List of other tested deployment schemes, description of testing methodology and, of course, all benchmark results you can find on “Ruby On Rails Benchmark Summary and Findings” page.

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