primary SELECT for post listing while logged-in and parenthesis around JOIN statements... maybe the background analyze statistics + incoming federation INSERT is causing the periods of crashing....

just hitting the first page, limit 20, using lemmy-ui
http://localhost:1234/c/zy_photography
default sort of "Active"
taking over 26 full seconds, each refresh.
463K posts in community, 6.18M posts in database
12K communities
block lists should be entirely empty
this is while logged-in

2023-08-16 12:46:44.049 MST [1520415] lemmy@lemmy_alpha LOG: duration: 26064.185 ms execute s22174:

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" IS NOT NULL), "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", "post_aggregates"."controversy_rank", "community_follower"."pending", ("post_saved"."id" IS NOT NULL), ("post_read"."id" IS NOT NULL), ("person_block"."id" IS NOT NULL), "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" = "person"."id")) INNER JOIN "community" ON ("post_aggregates"."community_id" = "community"."id")) LEFT OUTER JOIN "community_person_ban" ON (("post_aggregates"."community_id" = "community_person_ban"."community_id") AND ("community_person_ban"."person_id" = "post_aggregates"."creator_id")))
INNER JOIN "post" ON ("post_aggregates"."post_id" = "post"."id")) LEFT OUTER JOIN "community_follower" ON (("post_aggregates"."community_id" = "community_follower"."community_id") AND ("community_follower"."person_id" = $1)))
LEFT OUTER JOIN "community_moderator" ON (("post"."community_id" = "community_moderator"."community_id") AND ("community_moderator"."person_id" = $2)))
LEFT OUTER JOIN "post_saved" ON (("post_aggregates"."post_id" = "post_saved"."post_id") AND ("post_saved"."person_id" = $3)))
LEFT OUTER JOIN "post_read" ON (("post_aggregates"."post_id" = "post_read"."post_id") AND ("post_read"."person_id" = $4)))
LEFT OUTER JOIN "person_block" ON (("post_aggregates"."creator_id" = "person_block"."target_id") AND ("person_block"."person_id" = $5)))
LEFT OUTER JOIN "post_like" ON (("post_aggregates"."post_id" = "post_like"."post_id") AND ("post_like"."person_id" = $6)))
LEFT OUTER JOIN "person_post_aggregates" ON (("post_aggregates"."post_id" = "person_post_aggregates"."post_id") AND ("person_post_aggregates"."person_id" = $7)))
LEFT OUTER JOIN "community_block" ON (("post_aggregates"."community_id" = "community_block"."community_id") AND ("community_block"."person_id" = $8)))
LEFT OUTER JOIN "local_user_language" ON (("post"."language_id" = "local_user_language"."language_id") AND ("local_user_language"."local_user_id" = $9)))

WHERE ((((((((("community"."removed" = $10) AND ("post"."removed" = $11)) AND ("post_aggregates"."community_id" = $12)) AND (("community"."hidden" = $13) OR ("community_follower"."person_id" = $14))) AND ("post"."nsfw" = $15)) AND ("community"."nsfw" = $16)) AND ("local_user_language"."language_id" IS NOT NULL)) AND ("community_block"."person_id" IS NULL)) AND ("person_block"."person_id" IS NULL))

ORDER BY "post_aggregates"."featured_community" DESC , "post_aggregates"."hot_rank_active" DESC , "post_aggregates"."published" DESC LIMIT $17 OFFSET $18