increase min expiry for related tag cache to 1 hour

app/models/tag.rb

@@ -347,13 +347,15 @@ class Tag < ActiveRecord::Base
       base = Math.sqrt([post_count, 0].max)
       if base > 24
         24
+      elsif base < 1
+        1
       else
         base
       end
     end
     
     def should_update_related?
-      related_tags.blank? || related_tags_updated_at.blank? || related_tags_updated_at < related_cache_expiry.hours.ago
+      Delayed::Job.count < 200 && related_tags.blank? || related_tags_updated_at.blank? || related_tags_updated_at < related_cache_expiry.hours.ago
     end
     
     def related_tag_array

app/views/posts/partials/common/_secondary_links.html.erb

@@ -6,7 +6,7 @@
     <li><%= link_to "Hot", posts_path(:tags => "order:rank") %></li>
     <% unless CurrentUser.is_anonymous? %>
       <li><%= link_to "Favorites", favorites_path %></li>
-      <li><%= link_to "Subscriptions", posts_tag_subscription_path(CurrentUser.id) %></li>
+      <li><%= link_to "Subscriptions", posts_path(:tags => "sub:#{CurrentUser.name}") %></li>
     <% end %>
     <li class="nonessential"><%= link_to "Changes", post_versions_path %></li>
     <% if CurrentUser.is_janitor? %>