commit: 6f34a6a77f5df6ddd6980c85c9edcc6aa400df73
parent: e078919f07c3542f8cc6aedc3c554404f328e907
Author: Akihiko Odaki (@fn_aki@pawoo.net) <akihiko.odaki.4i@stu.hosei.ac.jp>
Date: Sat, 24 Jun 2017 00:46:00 +0900
Add index statuses on account_id and id (#3895)
Diffstat:
2 files changed, 15 insertions(+), 2 deletions(-)
diff --git a/db/migrate/20170610000000_add_statuses_index_on_account_id_id.rb b/db/migrate/20170610000000_add_statuses_index_on_account_id_id.rb
@@ -0,0 +1,13 @@
+class AddStatusesIndexOnAccountIdId < ActiveRecord::Migration[5.1]
+ disable_ddl_transaction!
+
+ def change
+ # Statuses queried by account_id are often sorted by id. Querying statuses
+ # of an account to show them in his status page is one of the most
+ # significant examples.
+ # Add this index to improve the performance in such cases.
+ add_index 'statuses', ['account_id', 'id'], algorithm: :concurrently, name: 'index_statuses_on_account_id_id'
+
+ remove_index 'statuses', algorithm: :concurrently, column: 'account_id', name: 'index_statuses_on_account_id'
+ end
+end
diff --git a/db/schema.rb b/db/schema.rb
@@ -10,7 +10,7 @@
#
# It's strongly recommended that you check this file into your version control system.
-ActiveRecord::Schema.define(version: 20170609145826) do
+ActiveRecord::Schema.define(version: 20170610000000) do
# These are extensions that must be enabled in order to support this database
enable_extension "plpgsql"
@@ -279,7 +279,7 @@ ActiveRecord::Schema.define(version: 20170609145826) do
t.integer "reblogs_count", default: 0, null: false
t.string "language"
t.bigint "conversation_id"
- t.index ["account_id"], name: "index_statuses_on_account_id"
+ t.index ["account_id", "id"], name: "index_statuses_on_account_id_id"
t.index ["conversation_id"], name: "index_statuses_on_conversation_id"
t.index ["in_reply_to_id"], name: "index_statuses_on_in_reply_to_id"
t.index ["reblog_of_id"], name: "index_statuses_on_reblog_of_id"
