Commit e88fa6cf authored by Greg Stark's avatar Greg Stark

Add partial indexes on todos to handle users with many todos

parent 3bbe60f8
---
title: Add partial indexes on todos to handle users with many todos
merge_request:
author:
type: performance
# See http://doc.gitlab.com/ce/development/migration_style_guide.html
# for more information on how to write migrations for GitLab.
class AddPartialIndexesOnTodos < ActiveRecord::Migration
include Gitlab::Database::MigrationHelpers
# Set this constant to true if this migration requires downtime.
DOWNTIME = false
disable_ddl_transaction!
INDEX_NAME_PENDING="index_todos_on_user_id_and_id_pending"
INDEX_NAME_DONE="index_todos_on_user_id_and_id_done"
def up
unless index_exists?(:todos, [:user_id, :id], name: INDEX_NAME_PENDING)
add_concurrent_index(:todos, [:user_id, :id], where: "state='pending'", name: INDEX_NAME_PENDING)
end
unless index_exists?(:todos, [:user_id, :id], name: INDEX_NAME_DONE)
add_concurrent_index(:todos, [:user_id, :id], where: "state='done'", name: INDEX_NAME_DONE)
end
end
def down
remove_concurrent_index(:todos, [:user_id, :id], where: "state='pending'", name: INDEX_NAME_PENDING)
remove_concurrent_index(:todos, [:user_id, :id], where: "state='done'", name: INDEX_NAME_DONE)
end
end
......@@ -11,7 +11,7 @@
#
# It's strongly recommended that you check this file into your version control system.
ActiveRecord::Schema.define(version: 20180309121820) do
ActiveRecord::Schema.define(version: 20180309160427) do
# These are extensions that must be enabled in order to support this database
enable_extension "plpgsql"
......@@ -1778,6 +1778,8 @@ ActiveRecord::Schema.define(version: 20180309121820) do
add_index "todos", ["note_id"], name: "index_todos_on_note_id", using: :btree
add_index "todos", ["project_id"], name: "index_todos_on_project_id", using: :btree
add_index "todos", ["target_type", "target_id"], name: "index_todos_on_target_type_and_target_id", using: :btree
add_index "todos", ["user_id", "id"], name: "index_todos_on_user_id_and_id_done", where: "((state)::text = 'done'::text)", using: :btree
add_index "todos", ["user_id", "id"], name: "index_todos_on_user_id_and_id_pending", where: "((state)::text = 'pending'::text)", using: :btree
add_index "todos", ["user_id"], name: "index_todos_on_user_id", using: :btree
create_table "trending_projects", force: :cascade do |t|
......
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