95 lines
3.1 KiB
Ruby
95 lines
3.1 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 = 300
|
|
|
|
# This is an attempt to spread the load across remote servers, as
|
|
# spreading deletions across diverse accounts is likely to spread
|
|
# the deletion across diverse followers. It also helps each individual
|
|
# user see some effect sooner.
|
|
PER_ACCOUNT_BUDGET = 5
|
|
|
|
# This is an attempt to limit the workload generated by status removal
|
|
# jobs to something the particular server can handle.
|
|
PER_THREAD_BUDGET = 5
|
|
|
|
# These are latency limits on various queues above which a server is
|
|
# considered to be under load, causing the auto-deletion to be entirely
|
|
# skipped for that run.
|
|
LOAD_LATENCY_THRESHOLDS = {
|
|
default: 5,
|
|
push: 10,
|
|
# The `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.
|
|
pull: 5.minutes.to_i,
|
|
}.freeze
|
|
|
|
sidekiq_options retry: 0, lock: :until_executed, lock_ttl: 1.day.to_i
|
|
|
|
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 = scope.where(id: 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
|
|
# Each post deletion is a `RemovalWorker` job (on `default` queue), each
|
|
# potentially spawning many `ActivityPub::DeliveryWorker` jobs (on the `push` queue).
|
|
threads = Sidekiq::ProcessSet.new.select { |x| x['queues'].include?('push') }.pluck('concurrency').sum
|
|
[PER_THREAD_BUDGET * threads, MAX_BUDGET].min
|
|
end
|
|
|
|
def under_load?
|
|
LOAD_LATENCY_THRESHOLDS.any? { |queue, max_latency| queue_under_load?(queue, max_latency) }
|
|
end
|
|
|
|
private
|
|
|
|
def queue_under_load?(name, max_latency)
|
|
Sidekiq::Queue.new(name).latency > max_latency
|
|
end
|
|
|
|
def last_processed_id
|
|
redis.get('account_statuses_cleanup_scheduler:last_policy_id')
|
|
end
|
|
|
|
def save_last_processed_id(id)
|
|
if id.nil?
|
|
redis.del('account_statuses_cleanup_scheduler:last_policy_id')
|
|
else
|
|
redis.set('account_statuses_cleanup_scheduler:last_policy_id', id, ex: 1.hour.seconds)
|
|
end
|
|
end
|
|
end
|