Redmine

Firstly, sorry for the weird subject - it's the only way I can describe this.

I've recently upgraded my redmine from 1.3.x to 2.3.2.
We're using a bitnami VM as I know very little about rails or supporting technology.

Initially, we were using mysql as the database (which ships with the bitnami install) and we noticed that the app would sometimes "hang" for periods of time when loading pages.
I migrated it from mysql to sqlserver (as we have one in the office that serves our other dev systems) by copying the schema and data then updating database.yml and page load time dropped overall.
It's worth noting that we are also using SVN repository integration pointing at an external beanstalkapp SVN (cloud)

What I'm seeing is that sometimes the redmine instance just won't load a page for ages. It will just sit there and sometimes may show the "an error has occurred"
I've grabbed a copy of the last 1000 lines of production.log and attached it to this issue.
Most of the time everything will be fast and snappy but then occassionally, we'll get this (from production.log)
Completed 200 OK in 506885ms (Views: 1515.8ms | ActiveRecord: 1271.4ms)
Note the really huge page load time but the low active record and views load times.

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Environment:
Redmine version 2.3.2.stable
Ruby version 1.9.3-p448 (2013-06-27) [x86_64-linux]
Rails version 3.2.13
Environment production
Database adapter SQLServer
Redmine plugins:
no plugin installed

svn, version 1.7.5 (r1336830)
compiled Jul 12 2013, 12:41:27

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