WITH x AS (SELECT
u.id user_id,
SUM(CASE WHEN p.id IS NOT NULL AND t.id IS NOT NULL AND ua.action_type = 2 THEN 1 ELSE 0 END) likes_received,
SUM(CASE WHEN p.id IS NOT NULL AND t.id IS NOT NULL AND ua.action_type = 1 THEN 1 ELSE 0 END) likes_given,
COALESCE((SELECT COUNT(topic_id) FROM topic_views AS v WHERE v.user_id = u.id AND v.viewed_at > '2019-10-28 23:52:24.911261'), 0) topics_entered,
COALESCE((SELECT COUNT(id) FROM user_visits AS uv WHERE uv.user_id = u.id AND uv.visited_at > '2019-10-28 23:52:24.911261'), 0) days_visited,
COALESCE((SELECT SUM(posts_read) FROM user_visits AS uv2 WHERE uv2.user_id = u.id AND uv2.visited_at > '2019-10-28 23:52:24.911261'), 0) posts_read,
SUM(CASE WHEN t2.id IS NOT NULL AND ua.action_type = 4 THEN 1 ELSE 0 END) topic_count,
SUM(CASE WHEN p.id IS NOT NULL AND t.id IS NOT NULL AND ua.action_type = 5 THEN 1 ELSE 0 END) post_count
FROM users AS u
LEFT OUTER JOIN user_actions AS ua ON ua.user_id = u.id AND COALESCE(ua.created_at, '2019-10-28 23:52:24.911261') > '2019-10-28 23:52:24.911261'
LEFT OUTER JOIN posts AS p ON ua.target_post_id = p.id AND p.deleted_at IS NULL AND p.post_type = 1 AND NOT p.hidden
LEFT OUTER JOIN topics AS t ON p.topic_id = t.id AND t.archetype = 'regular' AND t.deleted_at IS NULL AND t.visible
LEFT OUTER JOIN topics AS t2 ON t2.id = ua.target_topic_id AND t2.archetype = 'regular' AND t2.deleted_at IS NULL AND t2.visible
LEFT OUTER JOIN categories AS c ON t.category_id = c.id
WHERE u.active
AND u.silenced_till IS NULL
AND u.id > 0
GROUP BY u.id)
UPDATE directory_items di SET
likes_received = x.likes_received,
likes_given = x.likes_given,
topics_entered = x.topics_entered,
days_visited = x.days_visited,
posts_read = x.posts_read,
topic_count = x.topic_count,
post_count = x.post_count
FROM x
WHERE
x.user_id = di.user_id AND
di.period_type = 5 AND (
di.likes_received <> x.likes_received OR
di.likes_given <> x.likes_given OR
di.topics_entered <> x.topics_entered OR
di.days_visited <> x.days_visited OR
di.posts_read <> x.posts_read OR
di.topic_count <> x.topic_count OR
di.post_count <> x.post_count )
VM ディスク、ストレージ、データベースは互いに分離されています。そのため、DB の負荷はストレージや VM のパフォーマンスに影響を与えません（与えるべきではありません）。また、これらのサービスの利点（前述の PostgreSQL インスタンスでのデータベース統計やパフォーマンス推奨事項など）を利用できます。
