diff --git a/mod/ping.php b/mod/ping.php
index 8efddb757..146e7e75b 100644
--- a/mod/ping.php
+++ b/mod/ping.php
@@ -138,7 +138,7 @@ function ping_init(App $a)
 
 		$condition = ["`unseen` AND `uid` = ? AND NOT `origin` AND (`vid` != ? OR `vid` IS NULL)",
 			local_user(), Verb::getID(Activity::FOLLOW)];
-		$items = Post::selectForUser(local_user(), ['wall', 'uid', 'uri-id'], $condition);
+		$items = Post::selectForUser(local_user(), ['wall', 'uid', 'uri-id'], $condition, ['limit' => 1000]);
 		if (DBA::isResult($items)) {
 			$items_unseen = Post::toArray($items, false);
 			$arr = ['items' => $items_unseen];
@@ -253,8 +253,8 @@ function ping_init(App $a)
 
 		$data['intro']    = $intro_count;
 		$data['mail']     = $mail_count;
-		$data['net']      = $network_count;
-		$data['home']     = $home_count;
+		$data['net']      = ($network_count < 1000) ? $network_count : '999+';
+		$data['home']     = ($home_count < 1000) ? $home_count : '999+';
 		$data['register'] = $register_count;
 
 		$data['all-events']       = $all_events;
diff --git a/src/Content/ForumManager.php b/src/Content/ForumManager.php
index 8556ba353..4f4165420 100644
--- a/src/Content/ForumManager.php
+++ b/src/Content/ForumManager.php
@@ -215,8 +215,9 @@ class ForumManager
 				AND `contact`.`network` IN (?, ?) AND `contact`.`contact-type` = ?
 				AND NOT `contact`.`blocked` AND NOT `contact`.`hidden`
 				AND NOT `contact`.`pending` AND NOT `contact`.`archive`
+				AND `contact`.`uid` = ?
 				GROUP BY `contact`.`id`",
-			local_user(), Protocol::DFRN, Protocol::ACTIVITYPUB, Contact::TYPE_COMMUNITY
+			local_user(), Protocol::DFRN, Protocol::ACTIVITYPUB, Contact::TYPE_COMMUNITY, local_user()
 		);
 
 		return DBA::toArray($stmtContacts);
diff --git a/src/Model/Tag.php b/src/Model/Tag.php
index 1bc700c3f..ab7845c2c 100644
--- a/src/Model/Tag.php
+++ b/src/Model/Tag.php
@@ -545,13 +545,21 @@ class Tag
 	 */
 	public static function setGlobalTrendingHashtags(int $period, int $limit = 10)
 	{
+		// Get a uri-id that is at least X hours old.
+		// We use the uri-id in the query for the hash tags since this is much faster
+		$post = Post::selectFirstThread(['uri-id'], ["`uid` = ? AND `received` < UTC_TIMESTAMP() - INTERVAL ? HOUR", 0, $period],
+			['order' => ['received' => true]]);
+		if (empty($post['uri-id'])) {
+			return [];
+		}
+
 		$block_sql = self::getBlockedSQL();
 
 		$tagsStmt = DBA::p("SELECT `name` AS `term`, COUNT(*) AS `score`, COUNT(DISTINCT(`author-id`)) as `authors`
 			FROM `tag-search-view`
-			WHERE `private` = ? AND `uid` = ? AND `received` > DATE_SUB(NOW(), INTERVAL ? HOUR) $block_sql
+			WHERE `private` = ? AND `uid` = ? AND `uri-id` > ? $block_sql
 			GROUP BY `term` ORDER BY `authors` DESC, `score` DESC LIMIT ?",
-			Item::PUBLIC, 0, $period, $limit);
+			Item::PUBLIC, 0, $post['uri-id'], $limit);
 
 		if (DBA::isResult($tagsStmt)) {
 			$tags = DBA::toArray($tagsStmt);
@@ -590,13 +598,21 @@ class Tag
 	 */
 	public static function setLocalTrendingHashtags(int $period, int $limit = 10)
 	{
+		// Get a uri-id that is at least X hours old.
+		// We use the uri-id in the query for the hash tags since this is much faster
+		$post = Post::selectFirstThread(['uri-id'], ["`uid` = ? AND `received` < UTC_TIMESTAMP() - INTERVAL ? HOUR", 0, $period],
+			['order' => ['received' => true]]);
+		if (empty($post['uri-id'])) {
+			return [];
+		}
+
 		$block_sql = self::getBlockedSQL();
 
 		$tagsStmt = DBA::p("SELECT `name` AS `term`, COUNT(*) AS `score`, COUNT(DISTINCT(`author-id`)) as `authors`
 			FROM `tag-search-view`
-			WHERE `private` = ? AND `wall` AND `origin` AND `received` > DATE_SUB(NOW(), INTERVAL ? HOUR) $block_sql
+			WHERE `private` = ? AND `wall` AND `origin` AND `uri-id` > ? $block_sql
 			GROUP BY `term` ORDER BY `authors` DESC, `score` DESC LIMIT ?",
-			Item::PUBLIC, $period, $limit);
+			Item::PUBLIC, $post['uri-id'], $limit);
 
 		if (DBA::isResult($tagsStmt)) {
 			$tags = DBA::toArray($tagsStmt);
diff --git a/src/Worker/ExpirePosts.php b/src/Worker/ExpirePosts.php
index de650f667..bd1addf11 100644
--- a/src/Worker/ExpirePosts.php
+++ b/src/Worker/ExpirePosts.php
@@ -170,7 +170,7 @@ class ExpirePosts
 	{
 		// We have to avoid deleting newly created "item-uri" entries.
 		// So we fetch a post that had been stored yesterday and only delete older ones.
-		$item = Post::selectFirst(['uri-id'], ["`uid` = ? AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY", 0, 1],
+		$item = Post::selectFirstThread(['uri-id'], ["`uid` = ? AND `received` < UTC_TIMESTAMP() - INTERVAL ? DAY", 0, 1],
 			['order' => ['received' => true]]);
 		if (empty($item['uri-id'])) {
 			Logger::warning('No item with uri-id found - we better quit here');