vongosling

LInux

Three system configuration parameters must be set to support a large number of open files and TCP connections with large bursts of messages. Changes can be made using the /etc/rc.d/rc.local or /etc/sysctl.conf script to preserve changes after reboot.

1. /proc/sys/fs/file-max: The maximum number of concurrently open files.

fs.file-max = 1000000

2. /proc/sys/net/ipv4/tcp_max_syn_backlog: Maximum number of remembered connection requests, which are still did not receive an acknowledgment from connecting client. The default value is 1024 for systems with more than 128Mb of memory, and 128 for low memory machines.

net.ipv4.tcp_max_syn_backlog = 3240000

3. /proc/sys/net/core/somaxconn: Limit of socket listen() backlog, known in userspace as SOMAXCONN. Defaults to 128.

net.core.somaxconn = 3240000

swlaschin

(*
This script analyzes the dependencies between top level types in a .NET Assembly.
It is then used to compare the dependency relationships in some F# projects with those in some C# projects.

Note that no attempt has been made to optimize the code yet! 

REQUIRES:

* Mono.Cecil for code analysis
  From http://www.mono-project.com/Cecil#Download 

tebjan

#!/bin/bash
#
#Usage:
#1.) Install cygwin and make sure you select the following packages:
#- gcc-mingw
#- pkg-config
#- mingw-zlib1
#- mingw-zlib-devel
#
#2.) Install the following Mono release package: "Mono for Windows, Gtk#, and XSP"

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:

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%' 

icebreaker

#!/bin/bash
#
# Copyright (c) 2011-2012, Mihail Szabolcs
#
# Released into the public domain. For more information see http://unlicense.org/ .
#
# Bootstraps an environment that makes it possible to cross-compile libraries like SDL, 
# or pretty much anything else in an easy and unobstrusive manner.
#
# Requirements:

tdd

# Put this in your ~/.gitconfig or ~/.config/git/config
# Windows users: "~" is your profile's home directory, e.g. C:\Users\<YourName>
[user]
  name = Your Full Name
  email = [email protected]
[color]
  # Enable colors in color-supporting terminals
  ui = auto
[alias]
  # List available aliases