chanks

Turning PostgreSQL into a queue serving 10,000 jobs per second

RDBMS-based job queues have been criticized recently for being unable to handle heavy loads. And they deserve it, to some extent, because the queries used to safely lock a job have been pretty hairy. SELECT FOR UPDATE followed by an UPDATE works fine at first, but then you add more workers, and each is trying to SELECT FOR UPDATE the same row (and maybe throwing NOWAIT in there, then catching the errors and retrying), and things slow down.

On top of that, they have to actually update the row to mark it as locked, so the rest of your workers are sitting there waiting while one of them propagates its lock to disk (and the disks of however many servers you're replicating to). QueueClassic got some mileage out of the novel idea of randomly picking a row near the front of the queue to lock, but I can't still seem to get more than an an extra few hundred jobs per second out of it under heavy load.

So, many developers have started going straight t

rab

# -*- Conf -*-
[color]
	branch = auto
	diff = auto
	status = auto
        showbranch = auto
	ui = true

# color.branch
#     A boolean to enable/disable color in the output of git-branch(1). May be set to always, false (or

sos4nt

# A xterm-256color based TERMINFO that adds the escape sequences for italic.
#
# Install:
#
#   tic xterm-256color-italic.terminfo
#
# Usage:
#
#   export TERM=xterm-256color-italic
#

simme

# First install tmux
brew install tmux

# For mouse support (for switching panes and windows)
# Only needed if you are using Terminal.app (iTerm has mouse support)
Install http://www.culater.net/software/SIMBL/SIMBL.php
Then install https://bitheap.org/mouseterm/

# More on mouse support http://floriancrouzat.net/2010/07/run-tmux-with-mouse-support-in-mac-os-x-terminal-app/

benatkin

// Place user-specific overrides in this file, to ensure they're preserved
// when upgrading
{
  "folder_exclude_patterns": [".svn", ".git", ".hg", "CVS", "node_modules"]
}

jorgeortiz85

// Usage:
//   p(instance)('privateMethod)(arg1, arg2, arg3)

class PrivateMethodCaller(x: AnyRef, methodName: String) {
  def apply(_args: Any*): Any = {
    val args = _args.map(_.asInstanceOf[AnyRef])
    def _parents: Stream[Class[_]] = Stream(x.getClass) #::: _parents.map(_.getSuperclass)
    val parents = _parents.takeWhile(_ != null).toList
    val methods = parents.flatMap(_.getDeclaredMethods)
    val method = methods.find(_.getName == methodName).getOrElse(throw new IllegalArgumentException("Method " + methodName + " not found"))

yuroyoro

object GeoHash{
  val base32 = "0123456789bcdefghjkmnpqrstuvwxyz"
  
  def encode( longtitude:Double, latitude:Double, range:Double) = {
    def asBit( d:Double,max:Double,min:Double ) : List[Boolean] = {
      val mid = ( max + min ) / 2
      var res = ( d >= mid )
      val (m,n) = if( res ) (max,mid) else (mid,min)
      if( Math.abs( m - n ) <= range ) 
        res :: Nil