I've been experimenting with memcached and read good things about the
dalli gem, so I thought I'd try it out on Heroku. I can't seem to get
it to work and m not getting back any obvious errors either.
My production.rb defines:
config.action_controller.perform_caching = true
config.cache_store = :dalli_store
...and in my Gemfile:
gem 'dalli'
However, based on the logs, it's not reading from the cache. Upon
refreshing the page in question twice (to make sure the cache was
written the first time around), I still get this:
Exist fragment? views/front_sidebar (506.9ms)
Write fragment views/front_sidebar (508.3ms)
Likewise, from the heroku console for the app in question:
>> Rails.cache.write('hello', 'world')
=> false
>> Rails.cache.read('hello')
=> nil
I've restarted the heroku server during my tests too, and have
confirmed that I have the add-on installed (the app name is
tvgridthing-stage, if a Heroku rep would like to take a look).
I don't know what other debug tools there are for dalli. I tried
checking the stats, but the instructions at
http://docs.heroku.com/memcache#getting-stats-on-usage
obviously don't apply to dalli, which doesn't seem to have a stats
command.
Locally on my Mac, things seem to work just fine, based on the
presence of 'Read fragment views/front_sidebar (0.0ms)' in the logs.
I'm running Rails 3.0.1 and dalli 0.10.0 FWIW.
Then I thought I'd try the standard memcached instead, so I added this
to my Gemfile
group :production do
gem "memcache-client"
gem 'memcached-northscale', :require => 'memcached'
end
...and in production.rb:
config.cache_store = :mem_cache_store, Memcached::Rails.new
Unfortunately, despite the :production group, when I went to do a
bundle install locally first, it tries to compile native extensions
under Mac OS X for memcached-northscale, and I get a compile error
that's been discussed here too:
http://osdir.com/ml/ruby-talk/2010-02/msg01693.html
Should I be able to tell bundle what environment to run under, so that
it'll ignore that on development and thus bypass any attempt to
install memcached-norrthscale?
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