---
title: Overview
description: "In your i2b2 Workbench directory there is a file called **i2b2workbench.ini** and it is in this file that the physical memory for the i2b2 Workbench is defined. Important This section only applies to Microsoft Windows and it is **optional**. You…"
url: "https://i2b2.org/docs/3-3-2-define-physical-memory/"
updated: "2026-09-15"
category: i2b2 Installation Guide / Chapter 5. Client Installation / 3. i2b2 Workbench Install (optional) / 3.3 Configuration / 3.3.2 Define Physical Memory
---

# Overview

In your i2b2 Workbench directory there is a file called **i2b2workbench.ini** and it is in this file that the physical memory for the i2b2 Workbench is defined.

Important

This section only applies to Microsoft Windows and it is **optional**. You do not need to edit this information to run the workbench only if you wish to change the default settings.

1. Go to *YOUR_I2B2_WB_DIR* and open the folder called **Windows**.

2. *Double click* on the **i2b2workbench.ini** file.

![](https://i2b2.org/wp-content/uploads/i2b2-installation-guide/attachments/214696117/214705030.png)

2. Edit the value of **Xmx** to be equal to the amount of physical memory on your computer. The default setting is *480m*.

***Example:***   Scenario: your computer is running with 1GB of Ram

Default Setting: -Xmx 480m

New Setting: -Xms 1024m