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Contents
# Copyright 2019 Google Inc. All rights reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
require 'fluent/plugin/input'
require 'objspace'
module Fluent
# Dump out all live objects to json files. Each file is a snapshot of the Ruby
# heap at that time. See http://tmm1.net/ruby21-objspace/ for more details.
class ObjectSpaceDumpInput < Fluent::Plugin::Input
Fluent::Plugin.register_input('object_space_dump', self)
helpers :timer
def initialize
super
ObjectSpace.trace_object_allocations_start
end
# Make sure you have enough disk space, because these files are large
# (roughly 50MB).
config_param :emit_interval, :time, default: 3600
def multi_workers_ready?
true
end
def start
super
# Dump during startup. The timer only fires after @emit_interval.
on_timer
timer_execute(:object_space_dump_input, @emit_interval,
&method(:on_timer))
end
def on_timer
GC.start
# Use Tempfile.create to open the file, in order to preserve the file.
file = Tempfile.create(['heap-' + fluentd_worker_id.to_s + '-', '.json'])
begin
log.info 'dumping object space to',
filepath: file.path,
worker: fluentd_worker_id
ObjectSpace.dump_all(output: file)
ensure
file.close
end
end
end
end
Version data entries
48 entries across 48 versions & 1 rubygems