vladvinnikov’s gists

vladvinnikov / deploy.rb

Created May 31, 2013 14:22 — forked from andruby/deploy.rb

	after "deploy:symlink", "deploy:restart_workers"

	##
	# Rake helper task.
	# http://pastie.org/255489
	# http://geminstallthat.wordpress.com/2008/01/27/rake-tasks-through-capistrano/
	# http://ananelson.com/said/on/2007/12/30/remote-rake-tasks-with-capistrano/
	def run_remote_rake(rake_cmd)
	rake_args = ENV['RAKE_ARGS'].to_s.split(',')
	cmd = "cd #{fetch(:latest_release)} && #{fetch(:rake, "rake")} RAILS_ENV=#{fetch(:rails_env, "production")} #{rake_cmd}"

vladvinnikov / redis_helper.rb

Created May 19, 2013 12:17 — forked from wxmn/redis_helper.rb

	module RedisHelper
	# decode Redis value back to Ruby object
	def self.decode(json)
	self.new(ActiveSupport::JSON.decode(json)["#{self.name.downcase}"])
	end

	# encode Ruby object for Redis
	def encoded
	self.updated_at = nil
	self.to_json

vladvinnikov / indexes

Last active December 15, 2015 03:29

Mysql indexes

	Индексы – допуск к высокой производительности MySQL, их необходимость и важность увеличивается пропорционально росту объема данных в базе. Индексы необходимо создавать для столбцов, по которым:

	- происходит поиск в части WHERE
	- идет соединение таблиц при JOIN
	- выполняется сортировка и группировка записи при GROUP BY и ORDER BY
	- осуществляется поиск MIN() и MAX()

	Индексы бывают составными, в этом случае очень важен порядок столбцов.

	Разбирая вывод EXPLAIN, стоит обратить внимание на столбцы:

vladvinnikov / nginx config

Created February 27, 2013 09:03

	Попробуйте http://nginx.org/en/docs/http/ngx_http_upstream_module.html#least_conn
	Ну или haproxy с "balance leastconn".

	Конфиги типа таких


	на сервере, где стоит nginx, который распределяет запросы

	upstream myserv_production {
	ip_hash;

vladvinnikov / Replace origianl paperclip

Created February 15, 2013 19:04

 class MyModel < ActiveRecord::Base
     has_attached_file :photo,
         :styles => { :original => "1024x1024>", :thumb => "150x150>" }
 end

vladvinnikov / spec_helper.rb

Created January 7, 2013 16:26 — forked from felipeelias/spec_helper.rb

	RSpec.configure do \|config\|
	config.around do \|example\|
	# For examples using capybara-webkit for example.
	# Remove this if you don't use it or anything similar
	if example.metadata[:js]
	example.run

	ActiveRecord::Base.connection.execute("TRUNCATE #{ActiveRecord::Base.connection.tables.join(',')} RESTART IDENTITY")
	else
	ActiveRecord::Base.transaction do

vladvinnikov / install_ruby_debug.sh

Created March 24, 2012 15:27 — forked from janv/install_ruby_debug.sh

Install Ruby-debug with RVM using Ruby 1.9.3-p0-falcon

	#!/bin/sh

	curl -LO http://rubyforge.org/frs/download.php/75414/linecache19-0.5.13.gem
	curl -LO http://rubyforge.org/frs/download.php/75415/ruby-debug-base19-0.11.26.gem

	gem install linecache19-0.5.13.gem
	gem install ruby-debug-base19-0.11.26.gem -- --with-ruby-include=$HOME/.rvm/rubies/ruby-1.9.3-p0-falcon/include/ruby-1.9.1/ruby-1.9.3-p0/

	rm linecache19-0.5.13.gem
	rm ruby-debug-base19-0.11.26.gem

vladvinnikov / gist:2183518

Created March 24, 2012 14:29

Ruby 1.9.3 ruby-debug19

	#!/bin/sh

	rvm_current=`rvm current`

	echo "Installing ruby-debug with $rvm_current ..."

	curl -OL http://rubyforge.org/frs/download.php/75414/linecache19-0.5.13.gem
	curl -OL http://rubyforge.org/frs/download.php/75415/ruby-debug-base19-0.11.26.gem

	gem install linecache19-0.5.13.gem ruby-debug-base19-0.11.26.gem ruby-debug19 -- --with-ruby-include=$rvm_path/src/$rvm_current

vladvinnikov / gist:2063777

Created March 17, 2012 18:18

Rails rspec speedup

	http://blog.carbonfive.com/2011/02/02/crank-your-specs/
	https://makandracards.com/makandra/950-speed-up-rspec-by-deferring-garbage-collection
	https://github.com/tmm1/perftools.rb

	RUBY_HEAP_MIN_SLOTS=500000
	RUBY_HEAP_SLOTS_INCREMENT=500000
	RUBY_HEAP_SLOTS_GROWTH_FACTOR=1
	RUBY_GC_MALLOC_LIMIT=100000000
	RUBY_HEAP_FREE_MIN=500000

vladvinnikov / gist:1979167

Created March 5, 2012 16:35

Fucking ImageMagick

	wget ftp://ftp.imagemagick.org/pub/ImageMagick/ImageMagick.tar.gz
	> tar -xzvf ImageMagick.tar.gz
	> ./configure --prefix=/usr/local --with-x=no --disable-static --with-modules --without-perl --without-magick-plus-plus --with-quantum-depth=8 --disable-openmp
	> make
	> sudo make install
	> sudo /sbin/ldconfig /usr/local
	> sudo ln -f /usr/local/bin/Magick-config /usr/bin/Magick-config
	> sudo PKG_CONFIG_PATH=/usr/local/lib/pkgconfig/ gem install rmagick

Vladimir Vinnikov vladvinnikov