Unverified Commit 3249d35b authored by ThibG's avatar ThibG Committed by GitHub

Improve account deletion performances further (#15407)

* Delete status records by batches of 50

* Do not precompute values that are only used once

* Do not generate redis events for removal of public toots older than two weeks

* Filter reported toots a priori for polls and status deletion

* Do not process reblogs when cleaning up public timelines

As in Mastodon proper, reblogs don't appear in public TLs

* Clean the deleted account's own feed in one go

* Refactor Account#clean_feed_manager and List#clean_feed_manager

* Delete instead of destroy a few more associations

* Fix preloading
Co-authored-by: default avatarClaire <claire.github-309c@sitedethib.com>
parent f1834964
......@@ -230,6 +230,36 @@ class FeedManager
end
end
# Completely clear multiple feeds at once
# @param [Symbol] type
# @param [Array<Integer>] ids
# @return [void]
def clean_feeds!(type, ids)
reblogged_id_sets = {}
redis.pipelined do
ids.each do |feed_id|
redis.del(key(type, feed_id))
reblog_key = key(type, feed_id, 'reblogs')
# We collect a future for this: we don't block while getting
# it, but we can iterate over it later.
reblogged_id_sets[feed_id] = redis.zrange(reblog_key, 0, -1)
redis.del(reblog_key)
end
end
# Remove all of the reblog tracking keys we just removed the
# references to.
redis.pipelined do
reblogged_id_sets.each do |feed_id, future|
future.value.each do |reblogged_id|
reblog_set_key = key(type, feed_id, "reblogs:#{reblogged_id}")
redis.del(reblog_set_key)
end
end
end
end
private
# Trim a feed to maximum size by removing older items
......
......@@ -578,17 +578,6 @@ class Account < ApplicationRecord
end
def clean_feed_manager
reblog_key = FeedManager.instance.key(:home, id, 'reblogs')
reblogged_id_set = Redis.current.zrange(reblog_key, 0, -1)
Redis.current.pipelined do
Redis.current.del(FeedManager.instance.key(:home, id))
Redis.current.del(reblog_key)
reblogged_id_set.each do |reblogged_id|
reblog_set_key = FeedManager.instance.key(:home, id, "reblogs:#{reblogged_id}")
Redis.current.del(reblog_set_key)
end
end
FeedManager.instance.clean_feeds!(:home, [id])
end
end
......@@ -34,17 +34,6 @@ class List < ApplicationRecord
private
def clean_feed_manager
reblog_key = FeedManager.instance.key(:list, id, 'reblogs')
reblogged_id_set = Redis.current.zrange(reblog_key, 0, -1)
Redis.current.pipelined do
Redis.current.del(FeedManager.instance.key(:list, id))
Redis.current.del(reblog_key)
reblogged_id_set.each do |reblogged_id|
reblog_set_key = FeedManager.instance.key(:list, id, "reblogs:#{reblogged_id}")
Redis.current.del(reblog_set_key)
end
end
FeedManager.instance.clean_feeds!(:list, [id])
end
end
......@@ -8,7 +8,7 @@ class BatchedRemoveStatusService < BaseService
# @param [Hash] options
# @option [Boolean] :skip_side_effects Do not modify feeds and send updates to streaming API
def call(statuses, **options)
ActiveRecord::Associations::Preloader.new.preload(statuses, options[:skip_side_effects] ? :reblogs : [:account, reblogs: :account])
ActiveRecord::Associations::Preloader.new.preload(statuses, options[:skip_side_effects] ? :reblogs : [:account, :tags, reblogs: :account])
statuses_and_reblogs = statuses.flat_map { |status| [status] + status.reblogs }
......@@ -27,7 +27,7 @@ class BatchedRemoveStatusService < BaseService
# transaction lock the database, but we use the delete method instead
# of destroy to avoid all callbacks. We rely on foreign keys to
# cascade the delete faster without loading the associations.
statuses_and_reblogs.each(&:delete)
statuses_and_reblogs.each_slice(50) { |slice| Status.where(id: slice.map(&:id)).delete_all }
# Since we skipped all callbacks, we also need to manually
# deindex the statuses
......@@ -35,11 +35,6 @@ class BatchedRemoveStatusService < BaseService
return if options[:skip_side_effects]
ActiveRecord::Associations::Preloader.new.preload(statuses_and_reblogs, :tags)
@tags = statuses_and_reblogs.each_with_object({}) { |s, h| h[s.id] = s.tags.map { |tag| tag.name.mb_chars.downcase } }
@json_payloads = statuses_and_reblogs.each_with_object({}) { |s, h| h[s.id] = Oj.dump(event: :delete, payload: s.id.to_s) }
# Batch by source account
statuses_and_reblogs.group_by(&:account_id).each_value do |account_statuses|
account = account_statuses.first.account
......@@ -51,8 +46,9 @@ class BatchedRemoveStatusService < BaseService
end
# Cannot be batched
@status_id_cutoff = Mastodon::Snowflake.id_at(2.weeks.ago)
redis.pipelined do
statuses_and_reblogs.each do |status|
statuses.each do |status|
unpush_from_public_timelines(status)
end
end
......@@ -66,12 +62,6 @@ class BatchedRemoveStatusService < BaseService
FeedManager.instance.unpush_from_home(follower, status)
end
end
return unless account.local?
statuses.each do |status|
FeedManager.instance.unpush_from_home(account, status)
end
end
def unpush_from_list_timelines(account, statuses)
......@@ -83,9 +73,9 @@ class BatchedRemoveStatusService < BaseService
end
def unpush_from_public_timelines(status)
return unless status.public_visibility?
return unless status.public_visibility? && status.id > @status_id_cutoff
payload = @json_payloads[status.id]
payload = Oj.dump(event: :delete, payload: status.id.to_s)
redis.publish('timeline:public', payload)
redis.publish(status.local? ? 'timeline:public:local' : 'timeline:public:remote', payload)
......@@ -95,7 +85,7 @@ class BatchedRemoveStatusService < BaseService
redis.publish(status.local? ? 'timeline:public:local:media' : 'timeline:public:remote:media', payload)
end
@tags[status.id].each do |hashtag|
status.tags.map { |tag| tag.name.mb_chars.downcase }.each do |hashtag|
redis.publish("timeline:hashtag:#{hashtag}", payload)
redis.publish("timeline:hashtag:#{hashtag}:local", payload) if status.local?
end
......
......@@ -46,10 +46,12 @@ class DeleteAccountService < BaseService
featured_tags
follow_requests
identity_proofs
list_accounts
migrations
mute_relationships
muted_by_relationships
notifications
owned_lists
scheduled_statuses
status_pins
)
......@@ -145,15 +147,14 @@ class DeleteAccountService < BaseService
purge_media_attachments!
purge_polls!
purge_generated_notifications!
purge_feeds!
purge_other_associations!
@account.destroy unless keep_account_record?
end
def purge_statuses!
@account.statuses.reorder(nil).find_in_batches do |statuses|
statuses.reject! { |status| reported_status_ids.include?(status.id) } if keep_account_record?
@account.statuses.reorder(nil).where.not(id: reported_status_ids).in_batches do |statuses|
BatchedRemoveStatusService.new.call(statuses, skip_side_effects: skip_side_effects?)
end
end
......@@ -167,11 +168,7 @@ class DeleteAccountService < BaseService
end
def purge_polls!
@account.polls.reorder(nil).find_each do |poll|
next if keep_account_record? && reported_status_ids.include?(poll.status_id)
poll.delete
end
@account.polls.reorder(nil).where.not(status_id: reported_status_ids).in_batches.delete_all
end
def purge_generated_notifications!
......@@ -187,6 +184,13 @@ class DeleteAccountService < BaseService
end
end
def purge_feeds!
return unless @account.local?
FeedManager.instance.clean_feeds!(:home, [@account.id])
FeedManager.instance.clean_feeds!(:list, @account.owned_lists.pluck(:id))
end
def purge_profile!
# If the account is going to be destroyed
# there is no point wasting time updating
......
......@@ -14,37 +14,11 @@ class Scheduler::FeedCleanupScheduler
private
def clean_home_feeds!
clean_feeds!(inactive_account_ids, :home)
feed_manager.clean_feeds!(:home, inactive_account_ids)
end
def clean_list_feeds!
clean_feeds!(inactive_list_ids, :list)
end
def clean_feeds!(ids, type)
reblogged_id_sets = {}
redis.pipelined do
ids.each do |feed_id|
redis.del(feed_manager.key(type, feed_id))
reblog_key = feed_manager.key(type, feed_id, 'reblogs')
# We collect a future for this: we don't block while getting
# it, but we can iterate over it later.
reblogged_id_sets[feed_id] = redis.zrange(reblog_key, 0, -1)
redis.del(reblog_key)
end
end
# Remove all of the reblog tracking keys we just removed the
# references to.
redis.pipelined do
reblogged_id_sets.each do |feed_id, future|
future.value.each do |reblogged_id|
reblog_set_key = feed_manager.key(type, feed_id, "reblogs:#{reblogged_id}")
redis.del(reblog_set_key)
end
end
end
feed_manager.clean_feeds!(:list, inactive_list_ids)
end
def inactive_account_ids
......
......@@ -43,10 +43,6 @@ RSpec.describe BatchedRemoveStatusService, type: :service do
expect(Redis.current).to have_received(:publish).with("timeline:#{jeff.id}", any_args).at_least(:once)
end
it 'notifies streaming API of author' do
expect(Redis.current).to have_received(:publish).with("timeline:#{alice.id}", any_args).at_least(:once)
end
it 'notifies streaming API of public timeline' do
expect(Redis.current).to have_received(:publish).with('timeline:public', any_args).at_least(:once)
end
......
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