Merge branch '197955-projects-api-improve-api-response-time-for-archived-true' into 'master'

Projects API: Improve API response time for archived=true

See merge request gitlab-org/gitlab!27717

changelogs/unreleased/197955-projects-api-improve-api-response-time-for-archived-true.yml

+---
+title: Improve API response for archived project searchs
+merge_request: 27717
+author:
+type: performance

db/migrate/20200323134519_add_api_indexes_for_archived_projects.rb

+# frozen_string_literal: true
+
+class AddApiIndexesForArchivedProjects < ActiveRecord::Migration[6.0]
+  include Gitlab::Database::MigrationHelpers
+
+  DOWNTIME = false
+
+  PUBLIC_AND_ARCHIVED_INDEX_NAME = "index_projects_api_created_at_id_for_archived_vis20"
+  ARCHIVED_INDEX_NAME = "index_projects_api_created_at_id_for_archived"
+
+  disable_ddl_transaction!
+
+  def up
+    add_concurrent_index :projects, [:created_at, :id],
+      where: "archived = true AND visibility_level = 20 AND pending_delete = false",
+      name: PUBLIC_AND_ARCHIVED_INDEX_NAME
+
+    add_concurrent_index :projects, [:created_at, :id], where: "archived = true AND pending_delete = false",
+      name: ARCHIVED_INDEX_NAME
+  end
+
+  def down
+    remove_concurrent_index_by_name :projects, ARCHIVED_INDEX_NAME
+
+    remove_concurrent_index_by_name :projects, PUBLIC_AND_ARCHIVED_INDEX_NAME
+  end
+end

db/structure.sql

@@ -9655,6 +9655,10 @@ CREATE UNIQUE INDEX index_project_tracing_settings_on_project_id ON public.proje
 
 CREATE INDEX index_projects_api_created_at_id_desc ON public.projects USING btree (created_at, id DESC);
 
+CREATE INDEX index_projects_api_created_at_id_for_archived ON public.projects USING btree (created_at, id) WHERE ((archived = true) AND (pending_delete = false));
+
+CREATE INDEX index_projects_api_created_at_id_for_archived_vis20 ON public.projects USING btree (created_at, id) WHERE ((archived = true) AND (visibility_level = 20) AND (pending_delete = false));
+
 CREATE INDEX index_projects_api_last_activity_at_id_desc ON public.projects USING btree (last_activity_at, id DESC);
 
 CREATE INDEX index_projects_api_name_id_desc ON public.projects USING btree (name, id DESC);
@@ -12795,6 +12799,7 @@ COPY "schema_migrations" (version) FROM STDIN;
 20200320123839
 20200323075043
 20200323122201
+20200323134519
 20200324115359
 \.