pgidler

Create idle postgres connections for testing

Introduction

This program start a number of idle (or idle in transaction) sessions on a postgres database for testing purposes. It uses go routines (like threads) to execute independent clients. Each client executes a number of harmless SELECT's and then stops doing anything. The clients then hang either forever or until a specified timeout is reached.

This is an implementation of a tool described at AWS Blog: Performance impact of idle PostgreSQL connections.

Building

Run make to compile. You'll need Golang. The repo contains a pre-compiled binary for linux amd.

Install

Switch to a cluster context and there into the namespace of the pod on which you'd like to install the tool. Select the pod and execute:

make install pod=PODNAME

Usage

pgidler offers two idle modes:

• idle: create normal idle sessions
• idle in transaction: create sessions hanging in a transaction

The following commandline options are available:

Usage of ./pgidler:
  -c, --client int        Number of concurrent users (default 500)
  -d, --database string   Database (default "postgres")
  -i, --idletransaction   Wether to stay in idle in transaction state
  -p, --password string   Password of the database user
  -P, --port int          TCP Port (default 5432)
  -s, --server string     Server (default "localhost")
  -t, --timeout int       Wether to stop the clients after N seconds
  -u, --user string       Database user (default "postgres")