Gaston Festari cilindrox

A few show tricks to find slow queries in mongodb

Enable profiling

First, you have to enable profiling

> db.setProfilingLevel(1)

Now let it run for a while. It collects the slow queries ( > 100ms) into a capped collections, so queries go in and if it's full, old queries go out, so don't be surprised that it's a moving target...

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

Setting Up Clojure on OS X

I spent a lot of time trying to find a pretty optimal (for me) setup for Clojure… at the same time I was trying to dive in and learn it. This is never optimal; you shouldn't be fighting the environment while trying to learn something.

I feel like I went through a lot of pain searching Google, StackOverflow, blogs, and other sites for random tidbits of information and instructions.

This is a comprehensive "what I learned and what I ended up doing" that will hopefully be of use to others and act as a journal for myself if I ever have to do it again. I want to be very step-by-step and explain what's happening (and why) at each step.

Step 1: Getting Clojure (1.3)

tmux cheatsheet

As configured in my dotfiles.

start new:

tmux

start new with session name:

What is your folder-structure preference for a large-scale Node.js project?

0: Starting from Rails

This is the reference point. All the other options are based off this.

|-- app
|   |-- controllers
|   |   |-- admin

	<project xmlns="http://maven.apache.org/POM/4.0.0"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
	http://maven.apache.org/maven-v4_0_0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<groupId>com.gordondickens.sample</groupId>
	<artifactId>sample-parent</artifactId>
	<version>1.0.0</version>

	<packaging>pom</packaging>

	{
	// --------------------------------------------------------------------
	// JSHint Configuration, Strict Edition
	// --------------------------------------------------------------------
	//
	// This is a options template for [JSHint][1], using [JSHint example][2]
	// and [Ory Band's example][3] as basis and setting config values to
	// be most strict:
	//
	// * set all enforcing options to true

	!!!
	%title= "Your Website"
	%meta{ :charset => "utf-8" }
	%meta{ :http-equiv="X-UA-Compatible" :content => "IE=edge,chrome=1" }
	%meta{ :content => "", :name => "description" }
	%meta{ :content => "", :name => "author" }
	%link{ :href => "/css/style.css", :rel => "stylesheet" }
	%header
	%nav
	%ul

	--langdef=groovy
	--langmap=groovy:.groovy
	--regex-groovy=/^[ \t][(private\|public\|protected) ( \t)]def[ \t]+([A-Za-z0-9_]+)[ \t]*\(/\1/f,function,functions/
	--regex-groovy=/^[ \t]private def[ \t]+([A-Za-z0-9_]+)[ \t]/\1/v,private,private variables/
	--regex-groovy=/^[ \t]public def[ \t]+([A-Za-z0-9_]+)[ \t]/\1/u,public,public variables/
	--regex-groovy=/^[ \t][abstract ( \t)][(private\|public) ( \t)]class[ \t]+([A-Za-z0-9_]+)[ \t]/\1/c,class,classes/
	--regex-groovy=/^[ \t][abstract ( \t)][(private\|public) ( \t)]enum[ \t]+([A-Za-z0-9_]+)[ \t]/\1/c,class,classes/

	#
	# NOTE: This gist is now deprecated and has been moved into a gem: https://github.com/reidmorrison/mongo_ha
	#

	require 'mongo/collection'
	module Mongo
	class Collection

	alias_method :find_one_original, :find_one
	def find_one(*args)