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Adjusting indexes to make favorites query more efficient, based on feedback from ops.

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fave_user_id_idx index changed from (user_id) to (user_id,modified), so the timestamp ordering can be done straight from the index while we're looking up the user's notices.
Added to 08to09.sql and 08to09_pg.sql; may need to be run manually by folks doing development.
(No harm if you don't update it, the favorites tab/rss feed will just stay inefficent.)
This commit is contained in:
Brion Vibber 2009-11-10 08:23:24 -08:00
parent 486dbe6aef
commit 9d0687b055
4 changed files with 8 additions and 2 deletions
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3
db/08to09.sql
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@ -42,3 +42,6 @@ create table login_token (
constraint primary key (user_id) constraint primary key (user_id)
) ENGINE=InnoDB CHARACTER SET utf8 COLLATE utf8_bin; ) ENGINE=InnoDB CHARACTER SET utf8 COLLATE utf8_bin;
alter table fave
drop index fave_user_id_idx,
add index fave_user_id_idx (user_id,modified);

3
db/08to09_pg.sql
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@ -48,3 +48,6 @@ create table login_token (
constraint primary key (user_id) constraint primary key (user_id)
); );
alter table fave
drop index fave_user_id_idx,
add index fave_user_id_idx using btree(user_id,modified);

2
db/statusnet.sql
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@ -165,7 +165,7 @@ create table fave (
constraint primary key (notice_id, user_id), constraint primary key (notice_id, user_id),
index fave_notice_id_idx (notice_id), index fave_notice_id_idx (notice_id),
index fave_user_id_idx (user_id), index fave_user_id_idx (user_id,modified),
index fave_modified_idx (modified) index fave_modified_idx (modified)
) ENGINE=InnoDB CHARACTER SET utf8 COLLATE utf8_bin; ) ENGINE=InnoDB CHARACTER SET utf8 COLLATE utf8_bin;

2
db/statusnet_pg.sql
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@ -171,7 +171,7 @@ create table fave (
); );
create index fave_notice_id_idx on fave using btree(notice_id); create index fave_notice_id_idx on fave using btree(notice_id);
create index fave_user_id_idx on fave using btree(user_id); create index fave_user_id_idx on fave using btree(user_id,modified);
create index fave_modified_idx on fave using btree(modified); create index fave_modified_idx on fave using btree(modified);
/* tables for OAuth */ /* tables for OAuth */