# Users Per Engine Configuration

You can set the number of virtual users to initialize per engine before tests.

Let's take a look at the following example:

We want to run the tests with 1000 virtual users. With default settings, Loadium will start this test with 2 engines, 500 threads per engine. If you want to define a specific number of virtual users less than 500 per engine, click "Select Users Per Engine" button below.

<figure><img src="/files/BhuMK9rjjMxqogHP7ENt" alt="" width="375"><figcaption><p>Select Users Per Engine Button</p></figcaption></figure>

Enable the "Select Users Per Engine" button. Enter the Users Per Engine value you want to initialize per engine in the Users Per Engine field.

<figure><img src="/files/2XI32JjJySq0o5B5BNEt" alt="" width="375"><figcaption><p>50 users per engine, total 20 engines will be initialized</p></figcaption></figure>

## When To Use&#x20;

If there is an IP-based rate limit or connection limit on the servers you test, you can reduce the number of initialized users per IP by using this feature.

## Things To Pay Attention

{% hint style="warning" %}
If you are going to use a dedicated ip, make sure that the number of engines you set is not more than the number of dediceted ips in your account.
{% endhint %}


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