20220506175506_add_index_hotspots.exs
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20220506175506_add_index_hotspots.exs
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	# Pleroma: A lightweight social networking server
	# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
	# SPDX-License-Identifier: AGPL-3.0-only

	defmodule Pleroma.Repo.Migrations.AddIndexHotspots do
	use Ecto.Migration

	def change do
	# Stop inserts into activities from doing a full-table scan of users:
	create_if_not_exists(index(:users, [:ap_id, "COALESCE(follower_address, '')"]))

	# Change two indexes and a filter recheck into one index scan:
	create_if_not_exists(index(:following_relationships, [:follower_id, :state]))

	create_if_not_exists(index(:notifications, [:user_id, :seen]))
	end
	end