nebiros

group :production do
  gem "unicorn"
end

jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

karussell

sudo apt-get update
sudo apt-get install openjdk-6-jdk

wget https://github.com/downloads/elasticsearch/elasticsearch/elasticsearch-0.19.8.deb
sudo dpkg -i elasticsearch-0.19.8.deb

# be sure you add "action.disable_delete_all_indices" : true to the config!!

# if you want to remove it:
sudo dpkg -r elasticsearch

mitfik

def s3_form_tag(options = {}) 
    bucket            = options[:bucket]
    access_key_id     = options[:access_key_id]
    secret_access_key = options[:secret_access_key]
    key               = options[:key] || ''
    content_type      = options[:content_type] || '' # Defaults to binary/octet-stream if blank
    redirect          = options[:redirect] || '/' 
    acl               = options[:acl] || 'public-read'
    expiration_date   = options[:expiration_date].strftime('%Y-%m-%dT%H:%M:%S.000Z') if options[:expiration_date]
    max_filesize      = options[:max_filesize] || 671088640 # 5 gb

rgreenjr

-- show running queries (pre 9.2)
SELECT procpid, age(clock_timestamp(), query_start), usename, current_query 
FROM pg_stat_activity 
WHERE current_query != '<IDLE>' AND current_query NOT ILIKE '%pg_stat_activity%' 
ORDER BY query_start desc;

-- show running queries (9.2)
SELECT pid, age(clock_timestamp(), query_start), usename, query 
FROM pg_stat_activity 
WHERE query != '<IDLE>' AND query NOT ILIKE '%pg_stat_activity%' 

tehpeh

namespace :db do
  namespace :enable do
    desc "enable hstore extension"
    task :hstore => [:environment, :load_config] do
      ActiveRecord::Base.connection.execute('CREATE EXTENSION IF NOT EXISTS hstore;')
    end
  end

  Rake::Task['db:schema:load'].enhance ['db:enable:hstore']
end

mahemoff

# Run with: rake environment elasticsearch:reindex
# Begins by creating the index using tire:import command. This will create the "official" index name, e.g. "person" each time.
# Then we rename it to, e.g. "person20121001" and alias "person" to it.

namespace :elasticsearch do
  desc "re-index elasticsearch"
  task :reindex => :environment do

    klasses = [Place, Person, Caption]

schmurfy

require 'celluloid'

WORKERS_COUNT = (ARGV[0] || 1).to_i

class Output
  include Celluloid
  
  def puts(msg)
    Kernel.puts(msg)
  end

robcowie

# Description:
#   Submit time query to www.timeapi.org
#
# Commands:
#   hubot time - Current time in local timezone
#   hubot time <timezone> - Current time in timezone
#   hubot time <timezone> <query> - Time in timezone based on query

module.exports = (robot) ->

dergachev

OS X Screencast to animated GIF

This gist shows how to create a GIF screencast using only free OS X tools: QuickTime, ffmpeg, and gifsicle.

Instructions

To capture the video (filesize: 19MB), using the free "QuickTime Player" application: