It turned out that the bundled memcache client that came with ActiveSupport (1.6.5) was, for some reason, _much_ slower than the one we were using before the Rails 2.3 upgrade (we were using fiveruns- memcache-client (1.5.0.5), the one that has retries built in).
We've replaced the bundled memcache client with our old one, and it performs much better. On Apr 8, 1:52 pm, Clinton <clinton.for...@gmail.com> wrote: > After much effort I upgraded our fairly large Rails app from 2.1 to > 2.3. After deployment yesterday I noticed an across the board > increase in response times. It seems that every call to memcache now > takes 10x longer than before. Here are some example numbers from my > development log (below), with memcache running locally. We see > similar scale of performance drop in production as well - average > memcache call before 2ms, now 20ms. It adds up to a significant hit. > > Before Rails 2.3 upgrade: > > Cached fragment hit: views/homepage_recent_blog_posts (0.00043) > Cached fragment hit: views/homepage_active_threads (0.00033) > Cached fragment hit: views/homepage_weekly_feature (0.00029) > Cached fragment hit: views/homepage_recent_approved_items (0.00036) > Cached fragment hit: views/homepage_popular_items (0.00037) > Cached fragment hit: views/number_of_members (0.00032) > > After Rails 2.3 upgrade: > > Cached fragment hit: views/homepage_recent_blog_posts (3.2ms) > Cached fragment hit: views/homepage_active_threads (3.5ms) > Cached fragment hit: views/homepage_weekly_feature (2.9ms) > Cached fragment hit: views/homepage_recent_approved_items (2.8ms) > Cached fragment hit: views/homepage_popular_items (3.1ms) > Cached fragment hit: views/number_of_members (6.7ms) > > Before I start delving into the memcache internals in Rails 2.3, has > anyone else experienced this degradation on their apps? Is there a > magic 'make it fast again' switch that I can flick? --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to rubyonrails-talk@googlegroups.com To unsubscribe from this group, send email to rubyonrails-talk+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en -~----------~----~----~----~------~----~------~--~---
