potential fix for #1800

app/models/tag_alias.rb

@@ -127,6 +127,7 @@ class TagAlias < ActiveRecord::Base
 
   def update_posts
     CurrentUser.without_safe_mode do
+      Post.without_timeout do
         Post.raw_tag_match(antecedent_name).find_each do |post|
           escaped_antecedent_name = Regexp.escape(antecedent_name)
           fixed_tags = post.tag_string.sub(/(?:\A| )#{escaped_antecedent_name}(?:\Z| )/, " #{consequent_name} ").strip
@@ -141,6 +142,7 @@ class TagAlias < ActiveRecord::Base
         consequent_tag.fix_post_count if consequent_tag
       end
     end
+  end
 
   def rename_wiki_and_artist
     antecedent_wiki = WikiPage.titled(antecedent_name).first

app/models/tag_implication.rb

@@ -127,6 +127,7 @@ class TagImplication < ActiveRecord::Base
 
   def update_posts
     CurrentUser.without_safe_mode do
+      Post.without_timeout do
         Post.raw_tag_match(antecedent_name).find_each do |post|
           fixed_tags = "#{post.tag_string} #{descendant_names}".strip
           CurrentUser.scoped(creator, creator_ip_addr) do
@@ -137,6 +138,7 @@ class TagImplication < ActiveRecord::Base
         end
       end
     end
+  end
   
   def normalize_names
     self.antecedent_name = antecedent_name.downcase.tr(" ", "_")