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Merge branch 'db_indexes' into dev

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Dessalines 2020-01-11 19:19:46 -05:00
commit 519a509412
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1
server/.gitignore vendored
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@ -2,3 +2,4 @@
.env
.idea
env_setup.sh
query_testing/*.json

16
server/migrations/2020-01-11-012452_add_indexes/down.sql vendored Normal file
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drop index idx_post_creator;
drop index idx_post_community;
drop index idx_post_like_post;
drop index idx_post_like_user;
drop index idx_comment_creator;
drop index idx_comment_parent;
drop index idx_comment_post;
drop index idx_comment_like_comment;
drop index idx_comment_like_user;
drop index idx_comment_like_post;
drop index idx_community_creator;
drop index idx_community_category;

17
server/migrations/2020-01-11-012452_add_indexes/up.sql vendored Normal file
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-- Go through all the tables joins, optimize every view, CTE, etc.
create index idx_post_creator on post (creator_id);
create index idx_post_community on post (community_id);
create index idx_post_like_post on post_like (post_id);
create index idx_post_like_user on post_like (user_id);
create index idx_comment_creator on comment (creator_id);
create index idx_comment_parent on comment (parent_id);
create index idx_comment_post on comment (post_id);
create index idx_comment_like_comment on comment_like (comment_id);
create index idx_comment_like_user on comment_like (user_id);
create index idx_comment_like_post on comment_like (post_id);
create index idx_community_creator on community (creator_id);
create index idx_community_category on community (category_id);

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server/query_testing/generate_explain_reports.sh vendored Executable file
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#!/bin/sh
# Do the views first
echo "explain (analyze, format json) select * from user_view" > explain.sql
psql -qAt -U lemmy -f explain.sql > user_view.json
echo "explain (analyze, format json) select * from post_view where user_id is null order by hot_rank desc" > explain.sql
psql -qAt -U lemmy -f explain.sql > post_view.json
echo "explain (analyze, format json) select * from comment_view where user_id is null" > explain.sql
psql -qAt -U lemmy -f explain.sql > comment_view.json
echo "explain (analyze, format json) select * from community_view where user_id is null order by hot_rank desc" > explain.sql
psql -qAt -U lemmy -f explain.sql > community_view.json
echo "explain (analyze, format json) select * from site_view limit 1" > explain.sql
psql -qAt -U lemmy -f explain.sql > site_view.json
grep "Execution Time" *.json
rm explain.sql