Victor Ivanov ivanovv

For years, people have been using jemalloc with ruby. There were various benchmarks and discussions. Legend had it that Jemalloc 5 didn't work as well as Jemalloc 3.

Then, one day, hope appeared on the horizon. @wjordan offered a config for Jemalloc 5.

Ubuntu/Debian

FROM ruby:3.1.2-bullseye
RUN apt-get update ; \

Unless specified otherwise in Vagrantfile, the IP address of the host (the computer running Vagrant) from the perspective of the guest (the VM being run by Vagrant) is: 10.0.2.2

If that IP address doesn't work, then examination of Vagrantfile should reveal directives that changed it from its default value.

If an IP address can't be found in Vagrantfile, then the following command will probably reveal it:

route -A inet

Last Updated: March 2023

IMPORTANT: Ignore the out-of-date steps below for getting Chromium keys.

Instead, read this up-to-date guide (Jan 2023) written by @LearningToPi.

P.S. Thank you to every contributor below who provided tips over the years on what should be a straightforward process: setting up Chromium for local development.

Long live the web!

Default

Powerlevel10k

Using Unicorn with Upstart

This configuration works with Upstart on Ubuntu 12.04 LTS

The reason why it needs to be done this way (i.e. with the pre-start and post-stop stanzas), is because Upstart is unable to track whever Unicorn master process re-execs itself on hot deploys. One can use it without hot-deploys and run Unicorn in foreground also, it then only needs one exec stanza.

This presumes you are not using RVM, so no voodoo dances.

	require 'English'

	namespace :db do # rubocop:disable Metrics/BlockLength
	task :prevent_disparate_pg_dump_versions => :environment do
	allowed_pg_dump_version = '9.6.10'.freeze

	`pg_dump --version`
	pg_dump_exit_status = $CHILD_STATUS.exitstatus

	locally_installed_version = `pg_dump --version`.chomp[/(\d.*)/,1] rescue nil

	sysctl -w fs.file-max=12000500
	sysctl -w fs.nr_open=20000500
	ulimit -n 4000000
	sysctl -w net.ipv4.tcp_mem='10000000 10000000 10000000'
	sysctl -w net.ipv4.tcp_rmem='1024 4096 16384'
	sysctl -w net.ipv4.tcp_wmem='1024 4096 16384'
	sysctl -w net.core.rmem_max=16384
	sysctl -w net.core.wmem_max=16384
	wget http://packages.erlang-solutions.com/erlang-solutions_1.0_all.deb
	sudo dpkg -i erlang-solutions_1.0_all.deb

	# Simple approach to sending email from the Rails console
	# Implementation idea courtesy of Steve Klabnik
	# http://blog.steveklabnik.com/posts/2012-09-09-random-ruby-tricks--class-new

	# Create the mailer class with a block and assign to a variable
	mailer = Class.new(ActionMailer::Base) do
	def example_message
	mail(to: "test@test.com", from: "test@test.com", subject: "Example Message") do \|format\|
	format.text { render text: "Example message body" }
	end

	create_stamp("stamp") do
	fill_color "cc0000"
	text_box "[PAID]",
	:size => 2.cm,
	:width => bounds.width,
	:height => bounds.height,
	:align => :center,
	:valign => :center,
	:at => [0, bounds.height],
	:rotate => 45,

	# Speed things up by not loading Rails env
	config.assets.initialize_on_precompile = false