app/jobs/log_memory_consumption_job.rb
class LogMemoryConsumptionJob < Struct.new(:last_stat)
# Number of entries do display
N = 20
def perform
logpath = File.join(Rails.root, "log", "#{ENV['RAILS_ENV']}_memory_consumption.log")
logger = Logger.new(logpath)
stats = Hash.new(0)
ObjectSpace.each_object { |o| stats[o.class.to_s] += 1 }
i = 1
logger << "[#{Time.now.strftime('%F %T %z')}]\n"
stats.sort { |(k1, v1), (k2, v2)| v2 <=> v1 }.each do |k, v|
logger << (sprintf "%-60s %10d", k, v)
logger << (sprintf " | delta %10d", (v - last_stat[k])) if last_stat && last_stat[k]
logger << "\n"
break if i > N
i += 1
end
logger << "\n"
end
end