With Rails fragment caching working, why are SELECT statements appearing in my logs inside of the cached fragment?

Question

I've just got memcached setup on my website hosted on Heroku using memcachier and dalli. I have wrapped my homepage in a fragment cache block. In my logs, I can see that the fragment is being cached and read correctly, and I've already found that the results from load testing have greatly improved. But I'm wondering why I still see all these model lookups occuring. My understanding is that I should be able to completely avoid the trip to the database. Do the "Country Load" statements in my logs just represent loading the model from the cache? Or can I avoid them by changing how I'm doing caching?

Thanks for any help!

2013-04-03T22:48:03+00:00 app[web.1]: Read fragment views/home (15.4ms)
2013-04-03T22:48:03+00:00 app[web.1]:   Rendered shared/_home.html (18.8ms)
2013-04-03T22:48:03+00:00 app[web.1]:   Rendered cities/index.html within layouts/application (51.6ms)
2013-04-03T22:48:03+00:00 app[web.1]:   Country Load (9.7ms)  SELECT "countries".* FROM "countries" WHERE "countries"."name" = 'united states' LIMIT 1
2013-04-03T22:48:03+00:00 app[web.1]:   Country Load (5.0ms)  SELECT "countries".* FROM "countries" WHERE "countries"."name" = 'france' LIMIT 1
2013-04-03T22:48:03+00:00 app[web.1]:   Country Load (4.1ms)  SELECT "countries".* FROM "countries" WHERE "countries"."name" = 'spain' LIMIT 1
2013-04-03T22:48:03+00:00 app[web.1]:   Country Load (4.3ms)  SELECT "countries".* FROM "countries" WHERE "countries"."name" = 'united kingdom' LIMIT 1
2013-04-03T22:48:03+00:00 app[web.1]:   Country Load (3.4ms)  SELECT "countries".* FROM "countries" WHERE "countries"."name" = 'brazil' LIMIT 1
2013-04-03T22:48:03+00:00 app[web.1]:   Country Load (3.5ms)  SELECT "countries".* FROM "countries" WHERE "countries"."name" = 'china' LIMIT 1
2013-04-03T22:48:03+00:00 app[web.1]:   Country Load (3.0ms)  SELECT "countries".* FROM "countries" WHERE "countries"."name" = 'germany' LIMIT 1
2013-04-03T22:48:03+00:00 app[web.1]:   Country Load (2.8ms)  SELECT "countries".* FROM "countries" WHERE "countries"."name" = 'argentina' LIMIT 1
2013-04-03T22:48:03+00:00 app[web.1]:   Country Load (12.9ms)  SELECT "countries".* FROM "countries" WHERE "countries"."name" = 'japan' LIMIT 1
2013-04-03T22:48:03+00:00 app[web.1]:   Country Load (2.9ms)  SELECT "countries".* FROM "countries" WHERE "countries"."name" = 'italy' LIMIT 1
2013-04-03T22:48:03+00:00 app[web.1]:   Country Load (3.6ms)  SELECT "countries".* FROM "countries" WHERE "countries"."name" = 'canada' LIMIT 1
2013-04-03T22:48:03+00:00 app[web.1]:   Country Load (3.3ms)  SELECT "countries".* FROM "countries" WHERE "countries"."name" = 'thailand' LIMIT 1
2013-04-03T22:48:03+00:00 app[web.1]:   Country Load (3.2ms)  SELECT "countries".* FROM "countries" WHERE "countries"."name" = 'colombia' LIMIT 1
2013-04-03T22:48:03+00:00 app[web.1]:   Country Load (3.6ms)  SELECT "countries".* FROM "countries" WHERE "countries"."name" = 'south korea' LIMIT 1
2013-04-03T22:48:03+00:00 app[web.1]:   Country Load (10.7ms)  SELECT "countries".* FROM "countries" WHERE "countries"."name" = 'sweden' LIMIT 1
2013-04-03T22:48:03+00:00 app[web.1]:   Country Load (3.0ms)  SELECT "countries".* FROM "countries" WHERE "countries"."name" = 'singapore' LIMIT 1
2013-04-03T22:48:03+00:00 app[web.1]: Completed 200 OK in 743ms (Views: 359.6ms | ActiveRecord: 382.2ms)

Answer 1

Fragment caching in a view won't catch the layout - do you have a header or footer element that displays countries? You can wrap these in another fragment cache, as well.