Learning Heroku Postgres

Patrick Espake

• Verlag: Packt Publishing
• Jahr: 2015
• ISBN:
  9781782173458
• Thema: Informatica
• Thema: Amministrazione di sistemi

Learning Heroku Postgres

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Table of Contents

Learning Heroku Postgres

Credits

About the Author

About the Reviewers

www.PacktPub.com

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Why subscribe?

Free access for Packt account holders

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Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Downloading the example code

Errata

Piracy

Questions

1. Getting Started with Heroku Postgres

How does Heroku work?

Heroku Dashboard and Heroku Toolbelt

Deploying your applications

Heroku architecture

HTTP routing

Dyno Manager

Config vars

Understanding the Dynos

Workers

Add-ons

Logplex

Heroku API

Postgres supported versions

Choosing the right Heroku Postgres plan

Shared features

Production-tier technical characterization

High availability

Self-test Questions

Summary

2. Heroku Toolbelt

Signing up

Installing the Heroku Toolbelt

Logging in to Heroku

Deploying an application

The sample application source code

The dependencies file

Deploying the sample application

Visiting the sample application

Self-test questions

Summary

3. Postgres Add-on

Local setup

Setting up PostgreSQL on Mac OS X

Setting up PostgreSQL on Windows

Setting up PostgreSQL on Linux

Creating a local database

Creating a new app

Via the Heroku dashboard

Via the Heroku client

Adding the add-on and creating the first database

Adding the Heroku Postgres add-on

Via the Heroku add-ons gallery

Via the Heroku client

Creating the first database

Heroku Postgres web interface

Using the Heroku client with Postgres

The pg:info command

The pg:psql command

The pg:push command

The pg:pull command

The pg:ps command

The pg:kill command

The pg:killall command

The pg:promote command

The pg:credentials command

The pg:reset command

Connecting with Java

JDBC

Spring/XML

Connecting with Ruby

Connecting with Python

Connecting with Django

Connecting with Node.js

Connection permissions

Multiple schemas

External connections

Connecting to databases from outside Heroku

Monitoring and logging

Removing the add-on

Self-test Questions

Summary

4. PG Backups

Plans

Installing the add-on

Via the Heroku client

Via the web interface

Changing the plan

Creating a backup

Listing backups

Via the Heroku client

Via the web interface

Downloading a backup

Deleting backups

Restoring from a backup

Importing databases

Importing in Heroku Postgres

Exporting databases

Downloading the backup

Restoring to local database

Removing the add-on

Via the Heroku client

Via the web interface

Self-test Questions

Summary

5. Dataclips

Creating dataclips

Sharing dataclips

Interacting with dataclips

Data refresh

Dataclips security

Limitations and additional settings

Self-test questions

Summary

6. Rollback, Followers, and Forks

Heroku Postgres rollback

Checking the rollback feature

Available period

Creating a rollback database

Promote a rollback database

Deprovisioning a rollback database

Heroku Postgres follower databases

Creating and managing follower databases

Unfollow the main database

Upgrade the database plan with follower

High availability with followers

Heroku Postgres forking databases

Forking your database

Forking databases with the fast option

View your fork databases

Deprovisioning a fork database

Self-test questions

Summary

7. Understanding Log Statements and Common Errors

Log statements

Common errors

LOG: long duration

LOG: unexpected EOF on client connection

PGError: permission denied for relation

PGError: operator does not exist

PGError: relation "table-name" does not exist

PGError: column "column-name" cannot...

PGError: SSL SYSCALL error: EOF detected

PGError: prepared statement "a30" already exists

FATAL: too many connections for role

FATAL: could not receive data...

FATAL: role "role-name"...

FATAL: terminating connection due to administrator command

FATAL: remaining connection slots are reserved for non-replication superuser connections

Temporary file: path "file path", size "file size"

Metrics logs

Self-test questions

Summary

8. Extensions, PostGIS, Full Text Search Dictionaries, Data Caching, and Tuning

Heroku Postgres extensions

Data types

Case-insensitive text – citext

Cube

HStore

Label tree – ltree

Product numbering – isn

Functions

Earth distance

Intarray

Fuzzy match – fuzzystrmatch

PGCrypto

Table functions and pivot tables – tablefunc

Trigram – pg_trgm

UUID generation

Statistics

Row...