README.md

RDS Benchmarks

A set of fairly basic benchmarks (using benchmark-ips) to compare MySQL and PostgreSQL when running on Amazon RDS.

The following tables exist in the test databases:

• reviews
• review_comments
• review_ratings

PostgreSQL had the following amount of rows:

• reviews: 3959551 rows
• review_comments: 5002704 rows
• review_ratings: 14305626 rows

MySQL in turn had the following:

• reviews: 3959556 rows
• review_comments: 5002710 rows
• review_ratings: 14305657 rows

Schemas

The directory schema/ contains the PostgreSQL and MySQL schemas of the various tables, minus the actual data. These schemas have been trimmed as to not contain private or useless information.

Requirements

• Ruby 2.1 or newer
• Bundler
• MySQL development headers (for the mysql2 gem)
• PostgreSQL development headers (for the pg gem)

Installation

Install the required Gems:

bundle install

Configure PostgreSQL:

export PG_HOST='...'
export PG_DB='...'
export PG_USER='...'
export PG_PASSWORD='...'

Then configure MySQL:

export MYSQL_HOST='...'
export MYSQL_DB='...'
export MYSQL_USER='...'
export MYSQL_PASSWORD='...'

You can now run a benchmark:

ruby benchmark/bench_count_reviews.rb

Reading Material

• https://wiki.postgresql.org/wiki/Slow_Counting