adamvduke

# The blog post that started it all: https://neocities.org/blog/the-fcc-is-now-rate-limited
#
# Current known FCC address ranges:
# https://news.ycombinator.com/item?id=7716915
#
# Confirm/locate FCC IP ranges with this: http://whois.arin.net/rest/net/NET-165-135-0-0-1/pft
#
# In your nginx.conf:

location / {

adamvduke

#!/bin/bash

wget https://credis.googlecode.com/files/credis-0.2.3.tar.gz

tar -zxvf credis-0.2.3.tar.gz

cd credis-0.2.3

make

adamvduke

My largest Sidekiq application had a memory leak and I was able to find and fix it in just few hours spent on analyzing Ruby's heap. In this post I'll show my profiling setup.

As you might know Ruby 2.1 introduced a few great changes to ObjectSpace, so now it's much easier to find a line of code that is allocating too many objects. Here is great post explaining how it's working.

I was too lazy to set up some seeding and run it locally, so I checked that test suite passes when profiling is enabled and pushed debugging to production. Production environment also suited me better since my jobs data can't be fully random generated.

So, in order to profile your worker, add this to your Sidekiq configuration:

if ENV["PROFILE"]

adamvduke

$ dig app5.zeropush.com @ns1.dreamhost.com ANY
;; Truncated, retrying in TCP mode.

; <<>> DiG 9.8.3-P1 <<>> app5.zeropush.com @ns1.dreamhost.com ANY
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 62516
;; flags: qr aa rd; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; WARNING: recursion requested but not available

adamvduke

/*

Copyright (c) 2010 Adam Duke

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

adamvduke

/* Forces exclusive access to a database allowing a restore and subsequently restores the database from a backup file. This will interrupt any existing connections and rollback any in progress transactions. Use at your own risk. */

ALTER DATABASE [database_name] SET SINGLE_USER WITH ROLLBACK IMMEDIATE 
RESTORE DATABASE [database_name] 
FROM  DISK = N'C:\path\to\backup\backupfile.bak' 
WITH  FILE = 1,  KEEP_REPLICATION,  NOUNLOAD,  REPLACE,  STATS = 10
GO

adamvduke

#gsed is the GNU version of sed
#OSX ships with the BSD version which is apparently not the same

gsed -i 's/\([[:space:]]*\)\([[:print:]]\{1,\}\){/\1\2\n\1{/' ./Classes/*.m

adamvduke

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;

public class Dependencies {

	Map <String, Collection <String>> dependencyMap = new HashMap <String, Collection <String>>();

adamvduke

<?php
$var_utmac='UA-XXXXX'; //enter the new urchin code
$var_utmhn='ihazdomain.com'; //enter your domain
$var_utmcs='UTF-8'; // character set?
$var_utmsr='800x600'; //screen resolution
$var_utmsc='24-bit'; // screen colors
$var_utmul='en-us'; // language
$var_utmn=rand(1000000000,9999999999);//random request number
$var_cookie=rand(10000000,99999999);//random cookie number
$var_random=rand(1000000000,2147483647); //number under 2147483647

adamvduke

#!/usr/bin/env ruby

# Seems a bit silly to have a script to run redcloth considering you can just run
# $ redcloth inputfile.textile > outputfile.html
# but whatever

class Textilize
  
  require 'rubygems'
  require 'redcloth'