puma, sidekiqのheap_dumpをとる(gem 'rbtrace'が必要)

heap_dump.sh

#!/bin/bash -e
cd ~/live

sidekiq_pid=`ps aux | grep sidekiq | grep -v grep | awk '{print $2}'`
puma_pid=`ps aux | grep puma | grep -v grep | awk '{print $2}'`

/home/mastodon/.rbenv/shims/bundle exec rbtrace -p $puma_pid --timeout 30 -e 'Thread.new{GC.start;require "objspace";io=File.open("/tmp/puma.dump", "w"); ObjectSpace.dump_all(output: io); io.close}'
/home/mastodon/.rbenv/shims/bundle exec rbtrace -p $sidekiq_pid --timeout 30 -e 'Thread.new{GC.start;require "objspace";io=File.open("/tmp/sidekiq.dump", "w"); ObjectSpace.dump_all(output: io); io.close}'

# ちょっと待つと吉
sleep 5

rm /tmp/dump.tar.gz
tar -zcf /tmp/dump.tar.gz /tmp/puma.dump /tmp/sidekiq.dump
rm /tmp/*.dump

kernel params

# 吐き出しきれないときのために
sysctl kernel.msgmax=1073741824
sysctl kernel.msgmnb=1073741824

trace.sh

#!/bin/bash

# mastodon-web, mastodon-sidekiq起動後に実行する

cd ~/live
sidekiq_pid=`ps aux | grep sidekiq | grep -v grep | awk '{print $2}'`
puma_pid=`ps aux | grep puma | grep -v grep | awk '{print $2}'`
/home/mastodon/.rbenv/shims/bundle exec rbtrace -p $puma_pid -e 'Thread.new{require "rbtrace"; require "objspace";ObjectSpace.trace_object_allocations_start;}'
/home/mastodon/.rbenv/shims/bundle exec rbtrace -p $sidekiq_pid -e 'Thread.new{require "rbtrace"; require "objspace";ObjectSpace.trace_object_allocations_start;}'

参考情報.md

• http://tmm1.net/ruby21-objspace/
• https://samsaffron.com/archive/2015/03/31/debugging-memory-leaks-in-ruby