mirror of https://github.com/mastodon/mastodon.git
100 lines
3.4 KiB
Ruby
100 lines
3.4 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
class Scheduler::AccountsStatusesCleanupScheduler
|
|
include Sidekiq::Worker
|
|
include Redisable
|
|
|
|
# This limit is mostly to be nice to the fediverse at large and not
|
|
# generate too much traffic.
|
|
# This also helps limiting the running time of the scheduler itself.
|
|
MAX_BUDGET = 50
|
|
|
|
# This is an attempt to spread the load across instances, as various
|
|
# accounts are likely to have various followers.
|
|
PER_ACCOUNT_BUDGET = 5
|
|
|
|
# This is an attempt to limit the workload generated by status removal
|
|
# jobs to something the particular instance can handle.
|
|
PER_THREAD_BUDGET = 5
|
|
|
|
# Those avoid loading an instance that is already under load
|
|
MAX_DEFAULT_SIZE = 2
|
|
MAX_DEFAULT_LATENCY = 5
|
|
MAX_PUSH_SIZE = 5
|
|
MAX_PUSH_LATENCY = 10
|
|
# 'pull' queue has lower priority jobs, and it's unlikely that pushing
|
|
# deletes would cause much issues with this queue if it didn't cause issues
|
|
# with default and push. Yet, do not enqueue deletes if the instance is
|
|
# lagging behind too much.
|
|
MAX_PULL_SIZE = 500
|
|
MAX_PULL_LATENCY = 300
|
|
|
|
# This is less of an issue in general, but deleting old statuses is likely
|
|
# to cause delivery errors, and thus increase the number of jobs to be retried.
|
|
# This doesn't directly translate to load, but connection errors and a high
|
|
# number of dead instances may lead to this spiraling out of control if
|
|
# unchecked.
|
|
MAX_RETRY_SIZE = 50_000
|
|
|
|
sidekiq_options retry: 0, lock: :until_executed
|
|
|
|
def perform
|
|
return if under_load?
|
|
|
|
budget = compute_budget
|
|
first_policy_id = last_processed_id
|
|
|
|
loop do
|
|
num_processed_accounts = 0
|
|
|
|
scope = AccountStatusesCleanupPolicy.where(enabled: true)
|
|
scope.where(Account.arel_table[:id].gt(first_policy_id)) if first_policy_id.present?
|
|
scope.find_each(order: :asc) do |policy|
|
|
num_deleted = AccountStatusesCleanupService.new.call(policy, [budget, PER_ACCOUNT_BUDGET].min)
|
|
num_processed_accounts += 1 unless num_deleted.zero?
|
|
budget -= num_deleted
|
|
if budget.zero?
|
|
save_last_processed_id(policy.id)
|
|
break
|
|
end
|
|
end
|
|
|
|
# The idea here is to loop through all policies at least once until the budget is exhausted
|
|
# and start back after the last processed account otherwise
|
|
break if budget.zero? || (num_processed_accounts.zero? && first_policy_id.nil?)
|
|
|
|
first_policy_id = nil
|
|
end
|
|
end
|
|
|
|
def compute_budget
|
|
threads = Sidekiq::ProcessSet.new.select { |x| x['queues'].include?('push') }.pluck('concurrency').sum
|
|
[PER_THREAD_BUDGET * threads, MAX_BUDGET].min
|
|
end
|
|
|
|
def under_load?
|
|
return true if Sidekiq::Stats.new.retry_size > MAX_RETRY_SIZE
|
|
|
|
queue_under_load?('default', MAX_DEFAULT_SIZE, MAX_DEFAULT_LATENCY) || queue_under_load?('push', MAX_PUSH_SIZE, MAX_PUSH_LATENCY) || queue_under_load?('pull', MAX_PULL_SIZE, MAX_PULL_LATENCY)
|
|
end
|
|
|
|
private
|
|
|
|
def queue_under_load?(name, max_size, max_latency)
|
|
queue = Sidekiq::Queue.new(name)
|
|
queue.size > max_size || queue.latency > max_latency
|
|
end
|
|
|
|
def last_processed_id
|
|
redis.get('account_statuses_cleanup_scheduler:last_account_id')
|
|
end
|
|
|
|
def save_last_processed_id(id)
|
|
if id.nil?
|
|
redis.del('account_statuses_cleanup_scheduler:last_account_id')
|
|
else
|
|
redis.set('account_statuses_cleanup_scheduler:last_account_id', id, ex: 1.hour.seconds)
|
|
end
|
|
end
|
|
end
|