Lemmy.world shared a slow query, in detail! Yey!
SELECT post . id, post . name, post . url, post . body, post . creator_id, post . community_id, post . removed, post . locked, post . published, post . updated, post . deleted, post . nsfw, post . embed_title, post . embed_description, post . thumbnail_url, post . ap_id, post . local, post . embed_video_url, post . language_id, post . featured_community, post . featured_local, person . id, person . name, person . display_name, person . avatar, person . banned, person . published, person . updated, person . actor_id, person . bio, person . local, person . private_key, person . public_key, person . last_refreshed_at, person . banner, person . deleted, person . inbox_url, person . shared_inbox_url, person . matrix_user_id, person . admin, person . bot_account, person . ban_expires, person . instance_id, community . id, community . name, community . title, community . description, community . removed, community . published, community . updated, community . deleted, community . nsfw, community . actor_id, community . local, community . private_key, community . public_key, community . last_refreshed_at, community . icon, community . banner, community . followers_url, community . inbox_url, community . shared_inbox_url, community . hidden, community . posting_restricted_to_mods, community . instance_id, community . moderators_url, community . featured_url, community_person_ban . id, community_person_ban . community_id, community_person_ban . person_id, community_person_ban . published, community_person_ban . expires, post_aggregates . id, post_aggregates . post_id, post_aggregates . comments, post_aggregates . score, post_aggregates . upvotes, post_aggregates . downvotes, post_aggregates . published, post_aggregates . newest_comment_time_necro, post_aggregates . newest_comment_time, post_aggregates . featured_community, post_aggregates . featured_local, post_aggregates . hot_rank, post_aggregates . hot_rank_active, post_aggregates . community_id, post_aggregates . creator_id, community_follower . id, community_follower . community_id, community_follower . person_id, community_follower . published, community_follower . pending, post_saved . id, post_saved . post_id, post_saved . person_id, post_saved . published, post_read . id, post_read . post_id, post_read . person_id, post_read . published, person_block . id, person_block . person_id, person_block . target_id, person_block . published, post_like . score, coalesce ( ( post_aggregates . comments - person_post_aggregates . read_comments ), post_aggregates . comments ) FROM ( ( ( ( ( ( ( ( ( ( ( ( post_aggregates INNER JOIN person ON ( post_aggregates . creator_id = ? . id ) ) INNER JOIN post ON ( post_aggregates . post_id = ? . id ) ) INNER JOIN community ON ( post_aggregates . community_id = ? . id ) ) LEFT OUTER JOIN community_person_ban ON ( ( post_aggregates . community_id = ? . community_id ) AND ( community_person_ban . person_id = ? . creator_id ) ) ) LEFT OUTER JOIN community_follower ON ( ( post_aggregates . community_id = ? . community_id ) AND ( community_follower . person_id = ? ) ) ) LEFT OUTER JOIN post_saved ON ( ( post_aggregates . post_id = ? . post_id ) AND ( post_saved . person_id = ? ) ) ) LEFT OUTER JOIN post_read ON ( ( post_aggregates . post_id = ? . post_id ) AND ( post_read . person_id = ? ) ) ) LEFT OUTER JOIN person_block ON ( ( post_aggregates . creator_id = ? . target_id ) AND ( person_block . person_id = ? ) ) ) LEFT OUTER JOIN community_block ON ( ( post_aggregates . community_id = ? . community_id ) AND ( community_block . person_id = ? ) ) ) LEFT OUTER JOIN post_like ON ( ( post_aggregates . post_id = ? . post_id ) AND ( post_like . person_id = ? ) ) ) LEFT OUTER JOIN person_post_aggregates ON ( ( post_aggregates . post_id = ? . post_id ) AND ( person_post_aggregates . person_id = ? ) ) ) LEFT OUTER JOIN local_user_language ON ( ( post . language_id = ? . language_id ) AND ( local_user_language . local_user_id = ? ) ) ) WHERE ( ( ( ( ( ( ( ( community . removed = ? ) AND ( community . deleted = ? ) ) AND ( post . removed = ? ) ) AND ( post . deleted = ? ) ) AND ( community . local = ? ) ) AND ( ( community . hidden = ? ) OR ( community_follower . person_id = ? ) ) ) AND ( post . nsfw = ? ) ) AND ( community . nsfw = ? ) ) ORDER BY post_aggregates . featured_local DESC, post_aggregates . hot_rank DESC, post_aggregates . published DESC LIMIT ? OFFSET ?
I don't mention it as often in public, but lemmy.world is unable to keep up with database size. Errors are common.
Posting users have made about less content on Lemmy platform due to lemmy.world overloads: https://lemmy.world/post/2856311