clhenrick

PostgreSQL & PostGIS Cheat sheet

This is a collection of information on PostgreSQL and PostGIS for what I tend to use most often.

TOC

• PostgreSQL & PostGIS Cheat sheet
  • TOC
  • Installation
• Postgres

abkfenris

FROM ipython/notebook

MAINTAINER Alex Kerney <abk@mac.com>

RUN apt-get install -y -q python-numpy python-scipy python-matplotlib python-pandas python-sympy python-nose

sloria

The Best of the Best Practices (BOBP) Guide for Python

A "Best of the Best Practices" (BOBP) guide to developing in Python.

In General

Values

• "Build tools for others that you want to be built for you." - Kenneth Reitz
• "Simplicity is alway better than functionality." - Pieter Hintjens

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