diff --git a/public/src/client/account/topics.js b/public/src/client/account/topics.js
index c16ffd913d..a9c0452eef 100644
--- a/public/src/client/account/topics.js
+++ b/public/src/client/account/topics.js
@@ -3,15 +3,19 @@
 
 define('forum/account/topics', ['forum/account/header', 'forum/infinitescroll'], function (header, infinitescroll) {
 	var AccountTopics = {};
+	var method;
+	var template;
 	var set;
 
 	AccountTopics.init = function () {
 		header.init();
 
-		AccountTopics.handleInfiniteScroll('account/topics', 'uid:' + ajaxify.data.theirid + ':topics');
+		AccountTopics.handleInfiniteScroll('topics.loadMoreUserTopics', 'account/topics');
 	};
 
-	AccountTopics.handleInfiniteScroll = function (_template, _set) {
+	AccountTopics.handleInfiniteScroll = function (_method, _template, _set) {
+		method = _method;
+		template = _template;
 		set = _set;
 
 		if (!config.usePagination) {
@@ -24,8 +28,9 @@ define('forum/account/topics', ['forum/account/header', 'forum/infinitescroll'],
 			return;
 		}
 
-		infinitescroll.loadMore('topics.loadMoreFromSet', {
+		infinitescroll.loadMore(method, {
 			set: set,
+			uid: ajaxify.data.theirid,
 			after: $('[component="category"]').attr('data-nextstart'),
 			count: config.topicsPerPage,
 		}, function (data, done) {
@@ -40,7 +45,7 @@ define('forum/account/topics', ['forum/account/header', 'forum/infinitescroll'],
 	}
 
 	function onTopicsLoaded(topics, callback) {
-		app.parseAndTranslate('account/topics', 'topics', { topics: topics }, function (html) {
+		app.parseAndTranslate(template, 'topics', { topics: topics }, function (html) {
 			$('[component="category"]').append(html);
 			html.find('.timeago').timeago();
 			app.createUserTooltips();
diff --git a/public/src/client/account/watched.js b/public/src/client/account/watched.js
index 6ba9ccc19d..77450333d5 100644
--- a/public/src/client/account/watched.js
+++ b/public/src/client/account/watched.js
@@ -7,7 +7,7 @@ define('forum/account/watched', ['forum/account/header', 'forum/account/topics']
 	AccountWatched.init = function () {
 		header.init();
 
-		topics.handleInfiniteScroll('account/watched', 'uid:' + ajaxify.data.theirid + ':followed_tids');
+		topics.handleInfiniteScroll('topics.loadMoreFromSet', 'account/watched', 'uid:' + ajaxify.data.theirid + ':followed_tids');
 	};
 
 	return AccountWatched;
diff --git a/src/categories/recentreplies.js b/src/categories/recentreplies.js
index 3b9c8e51be..b00dac3ccc 100644
--- a/src/categories/recentreplies.js
+++ b/src/categories/recentreplies.js
@@ -204,12 +204,10 @@ module.exports = function (Categories) {
 				batch.processArray(pids, function (pids, next) {
 					async.waterfall([
 						function (next) {
-							posts.getPostsFields(pids, ['timestamp'], next);
+							posts.getPostsFields(pids, ['pid', 'uid', 'timestamp', 'upvotes', 'downvotes'], next);
 						},
 						function (postData, next) {
-							var timestamps = postData.map(function (post) {
-								return post && post.timestamp;
-							});
+							var timestamps = postData.map(p => p && p.timestamp);
 
 							async.parallel([
 								function (next) {
@@ -218,6 +216,25 @@ module.exports = function (Categories) {
 								function (next) {
 									db.sortedSetAdd('cid:' + cid + ':pids', timestamps, pids, next);
 								},
+								function (next) {
+									async.each(postData, function (post, next) {
+										db.sortedSetRemove([
+											'cid:' + oldCid + ':uid:' + post.uid + ':pids',
+											'cid:' + oldCid + ':uid:' + post.uid + ':pids:votes',
+										], post.pid, next);
+									}, next);
+								},
+								function (next) {
+									async.each(postData, function (post, next) {
+										const keys = ['cid:' + cid + ':uid:' + post.uid + ':pids'];
+										const scores = [post.timestamp];
+										if (post.votes > 0) {
+											keys.push('cid:' + cid + ':uid:' + post.uid + ':pids:votes');
+											scores.push(post.votes);
+										}
+										db.sortedSetsAdd(keys, scores, post.pid, next);
+									}, next);
+								},
 							], next);
 						},
 					], next);
diff --git a/src/controllers/accounts/posts.js b/src/controllers/accounts/posts.js
index 0ad438fa71..e3f831c7dc 100644
--- a/src/controllers/accounts/posts.js
+++ b/src/controllers/accounts/posts.js
@@ -7,6 +7,7 @@ var db = require('../../database');
 var user = require('../../user');
 var posts = require('../../posts');
 var topics = require('../../topics');
+var categories = require('../../categories');
 var pagination = require('../../pagination');
 var helpers = require('../helpers');
 var accountHelpers = require('./helpers');
@@ -15,52 +16,89 @@ var postsController = module.exports;
 
 var templateToData = {
 	'account/bookmarks': {
-		set: 'bookmarks',
 		type: 'posts',
 		noItemsFoundKey: '[[topic:bookmarks.has_no_bookmarks]]',
 		crumb: '[[user:bookmarks]]',
+		getSets: function (callerUid, userData, calback) {
+			setImmediate(calback, null, 'uid:' + userData.uid + ':bookmarks');
+		},
 	},
 	'account/posts': {
-		set: 'posts',
 		type: 'posts',
 		noItemsFoundKey: '[[user:has_no_posts]]',
 		crumb: '[[global:posts]]',
+		getSets: function (callerUid, userData, callback) {
+			async.waterfall([
+				function (next) {
+					categories.getCidsByPrivilege('categories:cid', callerUid, 'topics:read', next);
+				},
+				function (cids, next) {
+					next(null, cids.map(c => 'cid:' + c + ':uid:' + userData.uid + ':pids'));
+				},
+			], callback);
+		},
 	},
 	'account/upvoted': {
-		set: 'upvote',
 		type: 'posts',
 		noItemsFoundKey: '[[user:has_no_upvoted_posts]]',
 		crumb: '[[global:upvoted]]',
+		getSets: function (callerUid, userData, calback) {
+			setImmediate(calback, null, 'uid:' + userData.uid + ':upvote');
+		},
 	},
 	'account/downvoted': {
-		set: 'downvote',
 		type: 'posts',
 		noItemsFoundKey: '[[user:has_no_downvoted_posts]]',
 		crumb: '[[global:downvoted]]',
+		getSets: function (callerUid, userData, calback) {
+			setImmediate(calback, null, 'uid:' + userData.uid + ':downvote');
+		},
 	},
 	'account/best': {
-		set: 'posts:votes',
 		type: 'posts',
 		noItemsFoundKey: '[[user:has_no_voted_posts]]',
 		crumb: '[[global:best]]',
+		getSets: function (callerUid, userData, callback) {
+			async.waterfall([
+				function (next) {
+					categories.getCidsByPrivilege('categories:cid', callerUid, 'topics:read', next);
+				},
+				function (cids, next) {
+					next(null, cids.map(c => 'cid:' + c + ':uid:' + userData.uid + ':pids:votes'));
+				},
+			], callback);
+		},
 	},
 	'account/watched': {
-		set: 'followed_tids',
 		type: 'topics',
 		noItemsFoundKey: '[[user:has_no_watched_topics]]',
 		crumb: '[[user:watched]]',
+		getSets: function (callerUid, userData, calback) {
+			setImmediate(calback, null, 'uid:' + userData.uid + ':followed_tids');
+		},
 	},
 	'account/ignored': {
-		set: 'ignored_tids',
 		type: 'topics',
 		noItemsFoundKey: '[[user:has_no_ignored_topics]]',
 		crumb: '[[user:ignored]]',
+		getSets: function (callerUid, userData, calback) {
+			setImmediate(calback, null, 'uid:' + userData.uid + ':ignored_tids');
+		},
 	},
 	'account/topics': {
-		set: 'topics',
 		type: 'topics',
 		noItemsFoundKey: '[[user:has_no_topics]]',
 		crumb: '[[global:topics]]',
+		getSets: function (callerUid, userData, callback) {
+			async.waterfall([
+				function (next) {
+					categories.getCidsByPrivilege('categories:cid', callerUid, 'topics:read', next);
+				},
+				function (cids, next) {
+					next(null, cids.map(c => 'cid:' + c + ':uid:' + userData.uid + ':tids'));
+				},
+			], callback);
+		},
 	},
 };
 
@@ -98,9 +136,8 @@ postsController.getTopics = function (req, res, next) {
 
 function getFromUserSet(template, req, res, callback) {
 	var data = templateToData[template];
-	data.template = template;
-	data.method = data.type === 'posts' ? posts.getPostSummariesFromSet : topics.getTopicsFromSet;
 	var userData;
+	var settings;
 	var itemsPerPage;
 	var page = Math.max(1, parseInt(req.query.page, 10) || 1);
 
@@ -121,15 +158,16 @@ function getFromUserSet(template, req, res, callback) {
 			}
 
 			userData = results.userData;
+			settings = results.settings;
+			itemsPerPage = data.type === 'topics' ? settings.topicsPerPage : settings.postsPerPage;
 
-			var setName = 'uid:' + userData.uid + ':' + data.set;
-
-			itemsPerPage = (data.template === 'account/topics' || data.template === 'account/watched') ? results.settings.topicsPerPage : results.settings.postsPerPage;
-
+			data.getSets(req.uid, userData, next);
+		},
+		function (sets, next) {
 			async.parallel({
 				itemCount: function (next) {
-					if (results.settings.usePagination) {
-						db.sortedSetCard(setName, next);
+					if (settings.usePagination) {
+						db.sortedSetsCardSum(sets, next);
 					} else {
 						next(null, 0);
 					}
@@ -137,7 +175,8 @@ function getFromUserSet(template, req, res, callback) {
 				data: function (next) {
 					var start = (page - 1) * itemsPerPage;
 					var stop = start + itemsPerPage - 1;
-					data.method(setName, req.uid, start, stop, next);
+					const method = data.type === 'topics' ? topics.getTopicsFromSet : posts.getPostSummariesFromSet;
+					method(sets, req.uid, start, stop, next);
 				},
 			}, next);
 		},
@@ -149,10 +188,10 @@ function getFromUserSet(template, req, res, callback) {
 			userData.pagination = pagination.create(page, pageCount);
 
 			userData.noItemsFoundKey = data.noItemsFoundKey;
-			userData.title = '[[pages:' + data.template + ', ' + userData.username + ']]';
+			userData.title = '[[pages:' + template + ', ' + userData.username + ']]';
 			userData.breadcrumbs = helpers.buildBreadcrumbs([{ text: userData.username, url: '/user/' + userData.userslug }, { text: data.crumb }]);
 
-			res.render(data.template, userData);
+			res.render(template, userData);
 		},
 	], callback);
 }
diff --git a/src/controllers/accounts/profile.js b/src/controllers/accounts/profile.js
index cb320e7dcf..2f8a60d31f 100644
--- a/src/controllers/accounts/profile.js
+++ b/src/controllers/accounts/profile.js
@@ -4,9 +4,9 @@ var nconf = require('nconf');
 var async = require('async');
 
 const db = require('../../database');
-const privileges = require('../../privileges');
 var user = require('../../user');
 var posts = require('../../posts');
+const categories = require('../../categories');
 var plugins = require('../../plugins');
 var meta = require('../../meta');
 var accountHelpers = require('./helpers');
@@ -103,34 +103,23 @@ profileController.get = function (req, res, callback) {
 };
 
 function getLatestPosts(callerUid, userData, callback) {
-	async.waterfall([
-		function (next) {
-			db.getSortedSetRevRange('uid:' + userData.uid + ':posts', 0, 99, next);
-		},
-		function (pids, next) {
-			getPosts(callerUid, pids, next);
-		},
-	], callback);
+	getPosts(callerUid, userData, 'pids', callback);
 }
 
 function getBestPosts(callerUid, userData, callback) {
-	async.waterfall([
-		function (next) {
-			db.getSortedSetRevRange('uid:' + userData.uid + ':posts:votes', 0, 99, next);
-		},
-		function (pids, next) {
-			getPosts(callerUid, pids, next);
-		},
-	], callback);
+	getPosts(callerUid, userData, 'pids:votes', callback);
 }
 
-function getPosts(callerUid, pids, callback) {
+function getPosts(callerUid, userData, setSuffix, callback) {
 	async.waterfall([
 		function (next) {
-			privileges.posts.filter('topics:read', pids, callerUid, next);
+			categories.getCidsByPrivilege('categories:cid', callerUid, 'topics:read', next);
+		},
+		function (cids, next) {
+			const keys = cids.map(c => 'cid:' + c + ':uid:' + userData.uid + ':' + setSuffix);
+			db.getSortedSetRevRange(keys, 0, 9, next);
 		},
 		function (pids, next) {
-			pids = pids.slice(0, 10);
 			posts.getPostSummaryByPids(pids, callerUid, { stripTags: false }, next);
 		},
 	], callback);
diff --git a/src/database/mongo/sorted.js b/src/database/mongo/sorted.js
index 67af8adf19..b70be28198 100644
--- a/src/database/mongo/sorted.js
+++ b/src/database/mongo/sorted.js
@@ -162,6 +162,17 @@ module.exports = function (db, module) {
 		async.map(keys, module.sortedSetCard, callback);
 	};
 
+	module.sortedSetsCardSum = function (keys, callback) {
+		if (!keys || (Array.isArray(keys) && !keys.length)) {
+			return callback(null, 0);
+		}
+
+		db.collection('objects').countDocuments({ _key: Array.isArray(keys) ? { $in: keys } : keys }, function (err, count) {
+			count = parseInt(count, 10);
+			callback(err, count || 0);
+		});
+	};
+
 	module.sortedSetRank = function (key, value, callback) {
 		getSortedSetRank(false, key, value, callback);
 	};
diff --git a/src/database/postgres/sorted.js b/src/database/postgres/sorted.js
index 5d97d5428d..2a5610fbfa 100644
--- a/src/database/postgres/sorted.js
+++ b/src/database/postgres/sorted.js
@@ -259,6 +259,22 @@ SELECT o."_key" k,
 		});
 	};
 
+	module.sortedSetsCardSum = function (keys, callback) {
+		if (!keys || (Array.isArray(keys) && !keys.length)) {
+			return callback(null, 0);
+		}
+		if (!Array.isArray(keys)) {
+			keys = [keys];
+		}
+		module.sortedSetsCard(keys, function (err, counts) {
+			if (err) {
+				return callback(err);
+			}
+			const sum = counts.reduce(function (acc, val) { return acc + val; }, 0);
+			callback(null, sum);
+		});
+	};
+
 	module.sortedSetRank = function (key, value, callback) {
 		getSortedSetRank('ASC', [key], [value], function (err, result) {
 			callback(err, result ? result[0] : null);
diff --git a/src/database/redis/sorted.js b/src/database/redis/sorted.js
index 6dac8955aa..8f5202ebc9 100644
--- a/src/database/redis/sorted.js
+++ b/src/database/redis/sorted.js
@@ -129,6 +129,22 @@ module.exports = function (redisClient, module) {
 		batch.exec(callback);
 	};
 
+	module.sortedSetsCardSum = function (keys, callback) {
+		if (!keys || (Array.isArray(keys) && !keys.length)) {
+			return callback(null, 0);
+		}
+		if (!Array.isArray(keys)) {
+			keys = [keys];
+		}
+		module.sortedSetsCard(keys, function (err, counts) {
+			if (err) {
+				return callback(err);
+			}
+			const sum = counts.reduce(function (acc, val) { return acc + val; }, 0);
+			callback(null, sum);
+		});
+	};
+
 	module.sortedSetRank = function (key, value, callback) {
 		redisClient.zrank(key, value, callback);
 	};
diff --git a/src/posts/delete.js b/src/posts/delete.js
index b8bbede5db..29bf7ae0ae 100644
--- a/src/posts/delete.js
+++ b/src/posts/delete.js
@@ -111,6 +111,8 @@ module.exports = function (Posts) {
 				const tasks = [
 					async.apply(db.decrObjectField, 'global', 'postCount'),
 					async.apply(db.decrObjectField, 'category:' + topicData.cid, 'post_count'),
+					async.apply(db.sortedSetRemove, 'cid:' + topicData.cid + ':uid:' + postData.uid + ':pids', postData.pid),
+					async.apply(db.sortedSetRemove, 'cid:' + topicData.cid + ':uid:' + postData.uid + ':pids:votes', postData.pid),
 					async.apply(topics.decreasePostCount, postData.tid),
 					async.apply(topics.updateTeaser, postData.tid),
 					async.apply(topics.updateLastPostTimeFromLastPid, postData.tid),
diff --git a/src/posts/index.js b/src/posts/index.js
index 5d40d0aecb..3f18c2c9e9 100644
--- a/src/posts/index.js
+++ b/src/posts/index.js
@@ -144,46 +144,47 @@ Posts.updatePostVoteCount = function (postData, callback) {
 	}
 	async.parallel([
 		function (next) {
-			if (postData.uid) {
-				if (postData.votes > 0) {
-					db.sortedSetAdd('uid:' + postData.uid + ':posts:votes', postData.votes, postData.pid, next);
-				} else {
-					db.sortedSetRemove('uid:' + postData.uid + ':posts:votes', postData.pid, next);
-				}
-			} else {
-				next();
-			}
-		},
-		function (next) {
+			let cid;
 			async.waterfall([
 				function (next) {
 					topics.getTopicFields(postData.tid, ['mainPid', 'cid', 'pinned'], next);
 				},
 				function (topicData, next) {
-					if (parseInt(topicData.mainPid, 10) === parseInt(postData.pid, 10)) {
-						async.parallel([
-							function (next) {
-								topics.setTopicFields(postData.tid, {
-									upvotes: postData.upvotes,
-									downvotes: postData.downvotes,
-								}, next);
-							},
-							function (next) {
-								db.sortedSetAdd('topics:votes', postData.votes, postData.tid, next);
-							},
-							function (next) {
-								if (!topicData.pinned) {
-									db.sortedSetAdd('cid:' + topicData.cid + ':tids:votes', postData.votes, postData.tid, next);
-								} else {
-									next();
-								}
-							},
-						], function (err) {
-							next(err);
-						});
-						return;
+					cid = topicData.cid;
+					if (parseInt(topicData.mainPid, 10) !== parseInt(postData.pid, 10)) {
+						return db.sortedSetAdd('tid:' + postData.tid + ':posts:votes', postData.votes, postData.pid, next);
+					}
+					async.parallel([
+						function (next) {
+							topics.setTopicFields(postData.tid, {
+								upvotes: postData.upvotes,
+								downvotes: postData.downvotes,
+							}, next);
+						},
+						function (next) {
+							db.sortedSetAdd('topics:votes', postData.votes, postData.tid, next);
+						},
+						function (next) {
+							if (!topicData.pinned) {
+								db.sortedSetAdd('cid:' + topicData.cid + ':tids:votes', postData.votes, postData.tid, next);
+							} else {
+								next();
+							}
+						},
+					], function (err) {
+						next(err);
+					});
+				},
+				function (next) {
+					if (postData.uid) {
+						if (postData.votes > 0) {
+							db.sortedSetAdd('cid:' + cid + ':uid:' + postData.uid + ':pids:votes', postData.votes, postData.pid, next);
+						} else {
+							db.sortedSetRemove('cid:' + cid + ':uid:' + postData.uid + ':pids:votes', postData.pid, next);
+						}
+					} else {
+						next();
 					}
-					db.sortedSetAdd('tid:' + postData.tid + ':posts:votes', postData.votes, postData.pid, next);
 				},
 			], next);
 		},
diff --git a/src/socket.io/posts.js b/src/socket.io/posts.js
index 913d7bd0c5..a67f99297a 100644
--- a/src/socket.io/posts.js
+++ b/src/socket.io/posts.js
@@ -7,6 +7,7 @@ var privileges = require('../privileges');
 var plugins = require('../plugins');
 var meta = require('../meta');
 var topics = require('../topics');
+const categories = require('../categories');
 var user = require('../user');
 var websockets = require('./index');
 var socketHelpers = require('./helpers');
@@ -135,11 +136,27 @@ SocketPosts.loadMoreBookmarks = function (socket, data, callback) {
 };
 
 SocketPosts.loadMoreUserPosts = function (socket, data, callback) {
-	loadMorePosts('uid:' + data.uid + ':posts', socket.uid, data, callback);
+	async.waterfall([
+		function (next) {
+			categories.getCidsByPrivilege('categories:cid', socket.uid, 'topics:read', next);
+		},
+		function (cids, next) {
+			const keys = cids.map(c => 'cid:' + c + ':uid:' + data.uid + ':pids');
+			loadMorePosts(keys, socket.uid, data, next);
+		},
+	], callback);
 };
 
 SocketPosts.loadMoreBestPosts = function (socket, data, callback) {
-	loadMorePosts('uid:' + data.uid + ':posts:votes', socket.uid, data, callback);
+	async.waterfall([
+		function (next) {
+			categories.getCidsByPrivilege('categories:cid', socket.uid, 'topics:read', next);
+		},
+		function (cids, next) {
+			const keys = cids.map(c => 'cid:' + c + ':uid:' + data.uid + ':pids:votes');
+			loadMorePosts(keys, socket.uid, data, next);
+		},
+	], callback);
 };
 
 SocketPosts.loadMoreUpVotedPosts = function (socket, data, callback) {
diff --git a/src/socket.io/topics/infinitescroll.js b/src/socket.io/topics/infinitescroll.js
index 072a51d268..dd5897b0c5 100644
--- a/src/socket.io/topics/infinitescroll.js
+++ b/src/socket.io/topics/infinitescroll.js
@@ -3,6 +3,7 @@
 var async = require('async');
 
 var topics = require('../../topics');
+const categories = require('../../categories');
 var privileges = require('../../privileges');
 var meta = require('../../meta');
 var utils = require('../../utils');
@@ -117,6 +118,18 @@ module.exports = function (SocketTopics) {
 		topics.getTopicsFromSet(data.set, socket.uid, start, stop, callback);
 	};
 
+	SocketTopics.loadMoreUserTopics = function (socket, data, callback) {
+		async.waterfall([
+			function (next) {
+				categories.getCidsByPrivilege('categories:cid', socket.uid, 'topics:read', next);
+			},
+			function (cids, next) {
+				data.set = cids.map(c => 'cid:' + c + ':uid:' + data.uid + ':tids');
+				SocketTopics.loadMoreFromSet(socket, data, next);
+			},
+		], callback);
+	};
+
 	function calculateStartStop(data) {
 		var itemsPerPage = Math.min(meta.config.topicsPerPage || 20, parseInt(data.count, 10) || meta.config.topicsPerPage || 20);
 		var start = Math.max(0, parseInt(data.after, 10));
diff --git a/src/topics/fork.js b/src/topics/fork.js
index 6964314814..ecefbc8eea 100644
--- a/src/topics/fork.js
+++ b/src/topics/fork.js
@@ -158,13 +158,22 @@ module.exports = function (Topics) {
 				if (topicData[0].cid === topicData[1].cid) {
 					return callback();
 				}
-
-				async.parallel([
+				const removeFrom = [
+					'cid:' + topicData[0].cid + ':pids',
+					'cid:' + topicData[0].cid + ':uid:' + postData.uid + ':pids',
+					'cid:' + topicData[0].cid + ':uid:' + postData.uid + ':pids:votes',
+				];
+				const tasks = [
 					async.apply(db.incrObjectFieldBy, 'category:' + topicData[0].cid, 'post_count', -1),
 					async.apply(db.incrObjectFieldBy, 'category:' + topicData[1].cid, 'post_count', 1),
-					async.apply(db.sortedSetRemove, 'cid:' + topicData[0].cid + ':pids', postData.pid),
+					async.apply(db.sortedSetRemove, removeFrom, postData.pid),
 					async.apply(db.sortedSetAdd, 'cid:' + topicData[1].cid + ':pids', postData.timestamp, postData.pid),
-				], next);
+					async.apply(db.sortedSetAdd, 'cid:' + topicData[1].cid + ':uid:' + postData.uid + ':pids', postData.timestamp, postData.pid),
+				];
+				if (postData.votes > 0) {
+					tasks.push(async.apply(db.sortedSetAdd, 'cid:' + topicData[1].cid + ':uid:' + postData.uid + ':pids:votes', postData.votes, postData.pid));
+				}
+				async.parallel(tasks, next);
 			},
 		], callback);
 	}
diff --git a/src/upgrades/1.12.3/user_pid_sets.js b/src/upgrades/1.12.3/user_pid_sets.js
new file mode 100644
index 0000000000..d3f5b126a5
--- /dev/null
+++ b/src/upgrades/1.12.3/user_pid_sets.js
@@ -0,0 +1,54 @@
+'use strict';
+
+const async = require('async');
+
+const db = require('../../database');
+const batch = require('../../batch');
+const posts = require('../../posts');
+const topics = require('../../topics');
+
+module.exports = {
+	name: 'Create zsets for user posts per category',
+	timestamp: Date.UTC(2019, 5, 23),
+	method: function (callback) {
+		const progress = this.progress;
+
+		batch.processSortedSet('posts:pid', function (pids, next) {
+			async.eachSeries(pids, function (pid, _next) {
+				progress.incr();
+				let postData;
+
+				async.waterfall([
+					function (next) {
+						posts.getPostFields(pid, ['uid', 'tid', 'upvotes', 'downvotes', 'timestamp'], next);
+					},
+					function (_postData, next) {
+						if (!_postData.uid || !_postData.tid) {
+							return _next();
+						}
+						postData = _postData;
+						topics.getTopicField(postData.tid, 'cid', next);
+					},
+					function (cid, next) {
+						const keys = [
+							'cid:' + cid + ':uid:' + postData.uid + ':pids',
+						];
+						const scores = [
+							postData.timestamp,
+						];
+						if (postData.votes > 0) {
+							keys.push('cid:' + cid + ':uid:' + postData.uid + ':pids:votes');
+							scores.push(postData.votes);
+						}
+						db.sortedSetsAdd(keys, scores, pid, next);
+					},
+					function (next) {
+						db.sortedSetRemove('uid:' + postData.uid + ':posts:votes', pid, next);
+					},
+				], _next);
+			}, next);
+		}, {
+			progress: progress,
+		}, callback);
+	},
+};
diff --git a/test/database/sorted.js b/test/database/sorted.js
index a3416d6e11..4d17a50379 100644
--- a/test/database/sorted.js
+++ b/test/database/sorted.js
@@ -392,7 +392,7 @@ describe('Sorted Set methods', function () {
 	describe('sortedSetsCard()', function () {
 		it('should return the number of elements in sorted sets', function (done) {
 			db.sortedSetsCard(['sortedSetTest1', 'sortedSetTest2', 'doesnotexist'], function (err, counts) {
-				assert.equal(err, null);
+				assert.ifError(err);
 				assert.equal(arguments.length, 2);
 				assert.deepEqual(counts, [3, 2, 0]);
 				done();
@@ -418,6 +418,44 @@ describe('Sorted Set methods', function () {
 		});
 	});
 
+	describe('sortedSetsCardSum()', function () {
+		it('should return the total number of elements in sorted sets', function (done) {
+			db.sortedSetsCardSum(['sortedSetTest1', 'sortedSetTest2', 'doesnotexist'], function (err, sum) {
+				assert.ifError(err);
+				assert.equal(arguments.length, 2);
+				assert.equal(sum, 5);
+				done();
+			});
+		});
+
+		it('should return 0 if keys is falsy', function (done) {
+			db.sortedSetsCardSum(undefined, function (err, counts) {
+				assert.ifError(err);
+				assert.equal(arguments.length, 2);
+				assert.deepEqual(counts, 0);
+				done();
+			});
+		});
+
+		it('should return 0 if keys is empty array', function (done) {
+			db.sortedSetsCardSum([], function (err, counts) {
+				assert.ifError(err);
+				assert.equal(arguments.length, 2);
+				assert.deepEqual(counts, 0);
+				done();
+			});
+		});
+
+		it('should return the total number of elements in sorted set', function (done) {
+			db.sortedSetsCardSum('sortedSetTest1', function (err, sum) {
+				assert.ifError(err);
+				assert.equal(arguments.length, 2);
+				assert.equal(sum, 3);
+				done();
+			});
+		});
+	});
+
 	describe('sortedSetRank()', function () {
 		it('should return falsy if sorted set does not exist', function (done) {
 			db.sortedSetRank('doesnotexist', 'value1', function (err, rank) {