Class: Sidekiq::ProcessSet

Inherits:
Object
  • Object
show all
Includes:
Enumerable
Defined in:
lib/sidekiq/api.rb

Overview

Enumerates the set of Sidekiq processes which are actively working right now. Each process sends a heartbeat to Redis every 5 seconds so this set should be relatively accurate, barring network partitions.

Yield Parameters:

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(clean_plz = true) ⇒ ProcessSet

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

:nodoc:



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# File 'lib/sidekiq/api.rb', line 902

def initialize(clean_plz = true)
  cleanup if clean_plz
end

Class Method Details

.[](identity) ⇒ Object 



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# File 'lib/sidekiq/api.rb', line 882

def self.[](identity)
  exists, (info, busy, beat, quiet, rss, rtt_us) = Sidekiq.redis { |conn|
    conn.multi { |transaction|
      transaction.sismember("processes", identity)
      transaction.hmget(identity, "info", "busy", "beat", "quiet", "rss", "rtt_us")
    }
  }

  return nil if exists == 0 || info.nil?

  hash = Sidekiq.load_json(info)
  Process.new(hash.merge("busy" => busy.to_i,
    "beat" => beat.to_f,
    "quiet" => quiet,
    "rss" => rss.to_i,
    "rtt_us" => rtt_us.to_i))
end

Instance Method Details

#cleanup ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Cleans up dead processes recorded in Redis. Returns the number of processes cleaned. :nodoc:



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# File 'lib/sidekiq/api.rb', line 910

def cleanup
  # dont run cleanup more than once per minute
  return 0 unless Sidekiq.redis { |conn| conn.set("process_cleanup", "1", "NX", "EX", "60") }

  count = 0
  Sidekiq.redis do |conn|
    procs = conn.sscan("processes").to_a
    heartbeats = conn.pipelined { |pipeline|
      procs.each do |key|
        pipeline.hget(key, "info")
      end
    }

    # the hash named key has an expiry of 60 seconds.
    # if it's not found, that means the process has not reported
    # in to Redis and probably died.
    to_prune = procs.select.with_index { |proc, i|
      heartbeats[i].nil?
    }
    count = conn.srem("processes", to_prune) unless to_prune.empty?
  end
  count
end

#each ⇒ Object 



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# File 'lib/sidekiq/api.rb', line 934

def each
  result = Sidekiq.redis { |conn|
    procs = conn.sscan("processes").to_a.sort

    # We're making a tradeoff here between consuming more memory instead of
    # making more roundtrips to Redis, but if you have hundreds or thousands of workers,
    # you'll be happier this way
    conn.pipelined do |pipeline|
      procs.each do |key|
        pipeline.hmget(key, "info", "busy", "beat", "quiet", "rss", "rtt_us")
      end
    end
  }

  result.each do |info, busy, beat, quiet, rss, rtt_us|
    # If a process is stopped between when we query Redis for `procs` and
    # when we query for `result`, we will have an item in `result` that is
    # composed of `nil` values.
    next if info.nil?

    hash = Sidekiq.load_json(info)
    yield Process.new(hash.merge("busy" => busy.to_i,
      "beat" => beat.to_f,
      "quiet" => quiet,
      "rss" => rss.to_i,
      "rtt_us" => rtt_us.to_i))
  end
end

#leader ⇒ String

Returns the identity of the current cluster leader or “” if no leader. This is a Sidekiq Enterprise feature, will always return “” in Sidekiq or Sidekiq Pro.

Returns:

  • (String) —

    Identity of cluster leader

  • (String) —

    empty string if no leader



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# File 'lib/sidekiq/api.rb', line 991

def leader
  @leader ||= begin
    x = Sidekiq.redis { |c| c.get("dear-leader") }
    # need a non-falsy value so we can memoize
    x ||= ""
    x
  end
end

#size ⇒ Integer

This method is not guaranteed accurate since it does not prune the set based on current heartbeat. #each does that and ensures the set only contains Sidekiq processes which have sent a heartbeat within the last 60 seconds.

Returns:

  • (Integer) —

    current number of registered Sidekiq processes



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# File 'lib/sidekiq/api.rb', line 968

def size
  Sidekiq.redis { |conn| conn.scard("processes") }
end

#total_concurrency ⇒ Integer

Total number of threads available to execute jobs. For Sidekiq Enterprise customers this number (in production) must be less than or equal to your licensed concurrency.

Returns:

  • (Integer) —

    the sum of process concurrency



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# File 'lib/sidekiq/api.rb', line 976

def total_concurrency
  sum { |x| x["concurrency"].to_i }
end

#total_rss_in_kb ⇒ Integer Also known as: total_rss

Returns total amount of RSS memory consumed by Sidekiq processes.

Returns:

  • (Integer) —

    total amount of RSS memory consumed by Sidekiq processes



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# File 'lib/sidekiq/api.rb', line 981

def total_rss_in_kb
  sum { |x| x["rss"].to_i }
end