diff --git a/app/assets/javascripts/artists.js b/app/assets/javascripts/artists.js
index d390f4998..2d89c5e21 100644
--- a/app/assets/javascripts/artists.js
+++ b/app/assets/javascripts/artists.js
@@ -53,7 +53,9 @@
         $.ajax({
           url: "/artists.json",
           data: {
-            "search[name]": "*" + req.term + "*",
+            "search[name]": req.term + "*",
+            "search[is_active]": true,
+            "search[order]": "post_count",
             "limit": 10
           },
           method: "get",
diff --git a/app/assets/javascripts/pools.js b/app/assets/javascripts/pools.js
index 8e78a8701..b5e1bf24b 100644
--- a/app/assets/javascripts/pools.js
+++ b/app/assets/javascripts/pools.js
@@ -27,7 +27,6 @@
         $.ajax({
           url: "/pools.json",
           data: {
-            "search[is_active]": "true",
             "search[name_matches]": req.term,
             "limit": 10
           },
diff --git a/app/assets/javascripts/wiki_pages.js b/app/assets/javascripts/wiki_pages.js
index 9446d4efd..81c81a1dc 100644
--- a/app/assets/javascripts/wiki_pages.js
+++ b/app/assets/javascripts/wiki_pages.js
@@ -20,8 +20,9 @@
         $.ajax({
           url: "/wiki_pages.json",
           data: {
-            "search[title]": "*" + req.term + "*",
+            "search[title]": req.term + "*",
             "search[hide_deleted]": "Yes",
+            "search[order]": "post_count",
             "limit": 10
           },
           method: "get",
diff --git a/app/controllers/artists_controller.rb b/app/controllers/artists_controller.rb
index 7d6e67467..d56df0b49 100644
--- a/app/controllers/artists_controller.rb
+++ b/app/controllers/artists_controller.rb
@@ -38,7 +38,7 @@ class ArtistsController < ApplicationController
 
   def index
     search_params = params[:search].present? ? params[:search] : params
-    @artists = Artist.search(search_params).order("id desc").paginate(params[:page], :limit => params[:limit])
+    @artists = Artist.includes(:urls).search(search_params).paginate(params[:page], :limit => params[:limit], :search_count => params[:search])
     respond_with(@artists) do |format|
       format.xml do
         render :xml => @artists.to_xml(:include => [:urls], :root => "artists")
diff --git a/app/controllers/wiki_pages_controller.rb b/app/controllers/wiki_pages_controller.rb
index 96b92d4ad..213aefb29 100644
--- a/app/controllers/wiki_pages_controller.rb
+++ b/app/controllers/wiki_pages_controller.rb
@@ -15,13 +15,13 @@ class WikiPagesController < ApplicationController
   end
 
   def index
-    @wiki_pages = WikiPage.search(params[:search]).order("updated_at desc").paginate(params[:page], :limit => params[:limit], :search_count => params[:search])
+    @wiki_pages = WikiPage.search(params[:search]).paginate(params[:page], :limit => params[:limit], :search_count => params[:search])
     respond_with(@wiki_pages) do |format|
       format.html do
         if params[:page].nil? || params[:page].to_i == 1
-          if @wiki_pages.count == 1
+          if @wiki_pages.length == 1
             redirect_to(wiki_page_path(@wiki_pages.first))
-          elsif @wiki_pages.count == 0 && params[:search][:title].present? && params[:search][:title] !~ /\*/
+          elsif @wiki_pages.length == 0 && params[:search][:title].present? && params[:search][:title] !~ /\*/
             redirect_to(wiki_pages_path(:search => {:title => "*#{params[:search][:title]}*"}))
           end
         end
diff --git a/app/models/artist.rb b/app/models/artist.rb
index 911e1b88f..64d691771 100644
--- a/app/models/artist.rb
+++ b/app/models/artist.rb
@@ -21,6 +21,11 @@ class Artist < ActiveRecord::Base
   attr_accessible :is_active, :as => [:builder, :janitor, :moderator, :default, :admin]
   attr_accessible :is_banned, :as => :admin
 
+  scope :active, lambda { where(is_active: true) }
+  scope :deleted, lambda { where(is_active: false) }
+  scope :banned, lambda { where(is_banned: true) }
+  scope :unbanned, lambda { where(is_banned: false) }
+
   module UrlMethods
     extend ActiveSupport::Concern
 
@@ -328,14 +333,6 @@ class Artist < ActiveRecord::Base
   end
 
   module SearchMethods
-    def active
-      where("is_active = true")
-    end
-
-    def banned
-      where("is_banned = true")
-    end
-
     def url_matches(string)
       matches = find_all_by_url(string).map(&:id)
 
@@ -362,33 +359,33 @@ class Artist < ActiveRecord::Base
 
     def other_names_match(string)
       if string =~ /\*/ && CurrentUser.is_builder?
-        where("other_names ILIKE ? ESCAPE E'\\\\'", string.to_escaped_for_sql_like)
+        where("artists.other_names ILIKE ? ESCAPE E'\\\\'", string.to_escaped_for_sql_like)
       else
-        where("other_names_index @@ to_tsquery('danbooru', E?)", Artist.normalize_name(string).to_escaped_for_tsquery)
+        where("artists.other_names_index @@ to_tsquery('danbooru', E?)", Artist.normalize_name(string).to_escaped_for_tsquery)
       end
     end
 
     def group_name_matches(name)
       stripped_name = normalize_name(name).to_escaped_for_sql_like
-      where("group_name LIKE ? ESCAPE E'\\\\'", stripped_name)
+      where("artists.group_name LIKE ? ESCAPE E'\\\\'", stripped_name)
     end
 
     def name_matches(name)
       stripped_name = normalize_name(name).to_escaped_for_sql_like
-      where("name LIKE ? ESCAPE E'\\\\'", stripped_name)
+      where("artists.name LIKE ? ESCAPE E'\\\\'", stripped_name)
     end
 
     def named(name)
-      where("name = ?", normalize_name(name))
+      where(name: normalize_name(name))
     end
 
     def any_name_matches(name)
       stripped_name = normalize_name(name).to_escaped_for_sql_like
       if name =~ /\*/ && CurrentUser.is_builder?
-        where("(name LIKE ? ESCAPE E'\\\\' OR other_names LIKE ? ESCAPE E'\\\\')", stripped_name, stripped_name)
+        where("(artists.name LIKE ? ESCAPE E'\\\\' OR artists.other_names LIKE ? ESCAPE E'\\\\')", stripped_name, stripped_name)
       else
         name_for_tsquery = normalize_name(name).to_escaped_for_tsquery
-        where("(name LIKE ? ESCAPE E'\\\\' OR other_names_index @@ to_tsquery('danbooru', E?))", stripped_name, name_for_tsquery)
+        where("(artists.name LIKE ? ESCAPE E'\\\\' OR artists.other_names_index @@ to_tsquery('danbooru', E?))", stripped_name, name_for_tsquery)
       end
     end
 
@@ -413,7 +410,7 @@ class Artist < ActiveRecord::Base
         q = q.banned
 
       when /status:active/
-        q = q.where("is_banned = false and is_active = true")
+        q = q.unbanned.active
 
       when /./
         q = q.any_name_matches(params[:name])
@@ -422,23 +419,25 @@ class Artist < ActiveRecord::Base
       params[:order] ||= params.delete(:sort)
       case params[:order]
       when "name"
-        q = q.reorder("name")
+        q = q.order("artists.name")
       when "updated_at"
-        q = q.reorder("updated_at desc")
+        q = q.order("artists.updated_at desc")
+      when "post_count"
+        q = q.joins(:tag).order("tags.post_count desc")
       else
-        q = q.reorder("id desc")
+        q = q.order("artists.id desc")
       end
 
       if params[:is_active] == "true"
         q = q.active
       elsif params[:is_active] == "false"
-        q = q.where("is_active = false")
+        q = q.deleted
       end
 
       if params[:is_banned] == "true"
         q = q.banned
       elsif params[:is_banned] == "false"
-        q = q.where("is_banned = false")
+        q = q.unbanned
       end
 
       if params[:id].present?
diff --git a/app/models/pool.rb b/app/models/pool.rb
index 37932262d..0b8023979 100644
--- a/app/models/pool.rb
+++ b/app/models/pool.rb
@@ -45,9 +45,9 @@ class Pool < ActiveRecord::Base
     end
 
     def name_matches(name)
-      name = name.tr(" ", "_")
+      name = normalize_name_for_search(name)
       name = "*#{name}*" unless name =~ /\*/
-      where("name ilike ? escape E'\\\\'", name.to_escaped_for_sql_like)
+      where("lower(name) like ? escape E'\\\\'", name.to_escaped_for_sql_like)
     end
 
     def search(params)
@@ -139,6 +139,10 @@ class Pool < ActiveRecord::Base
     name.gsub(/\s+/, "_")
   end
 
+  def self.normalize_name_for_search(name)
+    normalize_name(name).mb_chars.downcase
+  end
+
   def self.normalize_post_ids(post_ids, unique)
     hoge = post_ids.scan(/\d+/)
     if unique
diff --git a/app/models/wiki_page.rb b/app/models/wiki_page.rb
index d31b7fb20..f2edc433e 100644
--- a/app/models/wiki_page.rb
+++ b/app/models/wiki_page.rb
@@ -79,10 +79,15 @@ class WikiPage < ActiveRecord::Base
       end
 
       params[:order] ||= params.delete(:sort)
-      if params[:order] == "time" || params[:order] == "Date"
+      case params[:order]
+      when "time"
         q = q.order("updated_at desc")
-      elsif params[:order] == "title" || params[:order] == "Name"
+      when "title"
         q = q.order("title")
+      when "post_count"
+        q = q.joins(:tag).order("tags.post_count desc")
+      else
+        q = q.order("updated_at desc")
       end
 
       q
diff --git a/app/views/artists/_search.html.erb b/app/views/artists/_search.html.erb
index 42a49edcc..3c256ff8d 100644
--- a/app/views/artists/_search.html.erb
+++ b/app/views/artists/_search.html.erb
@@ -15,7 +15,7 @@
         <th><label for="search_order">Order</label>
         <td>
           <div class="input">
-            <%= select "search", "order", [["Recently created", "created_at"], ["Last updated", "updated_at"], ["Name", "name"]], :selected => params[:search][:order] %>
+            <%= select "search", "order", [["Recently created", "created_at"], ["Last updated", "updated_at"], ["Name", "name"], ["Post count", "post_count"]], :selected => params[:search][:order] %>
           </div>
         </td>
       </tr>
diff --git a/app/views/wiki_pages/search.html.erb b/app/views/wiki_pages/search.html.erb
index fb312f803..9e7555e85 100644
--- a/app/views/wiki_pages/search.html.erb
+++ b/app/views/wiki_pages/search.html.erb
@@ -13,7 +13,7 @@
 
       <div class="input">
         <label for="search_order">Order</label>
-        <%= select "search", "order", ["Name", "Date"] %>
+        <%= select "search", "order", [%w[Name title], %w[Date time], %w[Posts post_count]] %>
       </div>
 
       <div class="input">
diff --git a/db/migrate/20170329185605_add_updated_at_index_on_wiki_pages.rb b/db/migrate/20170329185605_add_updated_at_index_on_wiki_pages.rb
new file mode 100644
index 000000000..0dfebb6bb
--- /dev/null
+++ b/db/migrate/20170329185605_add_updated_at_index_on_wiki_pages.rb
@@ -0,0 +1,7 @@
+class AddUpdatedAtIndexOnWikiPages < ActiveRecord::Migration
+  def change
+    WikiPage.without_timeout do
+      add_index :wiki_pages, :updated_at
+    end
+  end
+end
diff --git a/db/structure.sql b/db/structure.sql
index 7d30fe328..6789bdb88 100644
--- a/db/structure.sql
+++ b/db/structure.sql
@@ -7217,6 +7217,13 @@ CREATE UNIQUE INDEX index_wiki_pages_on_title ON wiki_pages USING btree (title);
 CREATE INDEX index_wiki_pages_on_title_pattern ON wiki_pages USING btree (title text_pattern_ops);
 
 
+--
+-- Name: index_wiki_pages_on_updated_at; Type: INDEX; Schema: public; Owner: -
+--
+
+CREATE INDEX index_wiki_pages_on_updated_at ON wiki_pages USING btree (updated_at);
+
+
 --
 -- Name: unique_schema_migrations; Type: INDEX; Schema: public; Owner: -
 --
@@ -7562,3 +7569,5 @@ INSERT INTO schema_migrations (version) VALUES ('20170316224630');
 
 INSERT INTO schema_migrations (version) VALUES ('20170319000519');
 
+INSERT INTO schema_migrations (version) VALUES ('20170329185605');
+