diff --git a/controllers/topic.js b/controllers/topic.js
index 886034b..95da108 100644
--- a/controllers/topic.js
+++ b/controllers/topic.js
@@ -12,7 +12,6 @@ var at = require('../services/at');
 var User = require('../proxy').User;
 var Topic = require('../proxy').Topic;
 var Tag = require('../proxy').Tag;
-var Relation = require('../proxy').Relation;
 var TopicTag = require('../proxy').TopicTag;
 var TopicCollect = require('../proxy').TopicCollect;
 
diff --git a/models/reply.js b/models/reply.js
index ac7cf5d..6ce1ff4 100644
--- a/models/reply.js
+++ b/models/reply.js
@@ -4,7 +4,7 @@ var ObjectId = Schema.ObjectId;
 
 var ReplySchema = new Schema({
 	content: { type: String },
-	topic_id: { type: ObjectId, index: true },
+	topic_id: { type: ObjectId},
 	author_id: { type: ObjectId },
 	reply_id : { type: ObjectId },
 	create_at: { type: Date, default: Date.now },
@@ -12,4 +12,6 @@ var ReplySchema = new Schema({
 	content_is_html: { type: Boolean }
 });
 
+ReplySchema.index({topic_id: 1});
+
 mongoose.model('Reply', ReplySchema);
diff --git a/models/user.js b/models/user.js
index 1c48cef..f6e7176 100644
--- a/models/user.js
+++ b/models/user.js
@@ -3,10 +3,10 @@ var Schema = mongoose.Schema;
 var config = require('../config').config;
 
 var UserSchema = new Schema({
-  name: { type: String, index: true },
-  loginname: { type: String, unique: true },
+  name: { type: String},
+  loginname: { type: String},
   pass: { type: String },
-  email: { type: String, unique: true },
+  email: { type: String},
   url: { type: String },
   profile_image_url: {type: String},
   location: { type: String },
@@ -14,7 +14,7 @@ var UserSchema = new Schema({
   profile: { type: String },
   weibo: { type: String },
   avatar: { type: String },
-  githubId: { type: String, index: true },
+  githubId: { type: String},
   githubUsername: {type: String},
   is_block: {type: Boolean, default: false},
 
@@ -44,4 +44,10 @@ UserSchema.virtual('avatar_url').get(function () {
   return url.replace('http://www.gravatar.com/', 'http://cnodegravatar.u.qiniudn.com/');
 });
 
+UserSchema.index({name: 1});
+UserSchema.index({loginname: 1}, {unique: true});
+UserSchema.index({email: 1}, {unique: true});
+UserSchema.index({score: -1});
+UserSchema.index({githubId: 1});
+
 mongoose.model('User', UserSchema);