---
title: "Handle lack of capacity"
slug: "handle-lack-of-capacity"
updated: 2026-05-18T08:24:41Z
published: 2026-08-19T08:32:14Z
canonical: "docs.grassfish.com/handle-lack-of-capacity"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.grassfish.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Handle lack of capacity

The system notifies you if you can't [reserve a booking](/grassfish/docs/reserve-and-order-bookings) because the selected ad spaces are fully booked.

There are two different ways to handle this lack of capacity:

- [Reduce ad spaces](/grassfish/docs/handle-lack-of-capacity#reduce-ad-spaces)
- [Put the booking on the waiting list](/grassfish/docs/handle-lack-of-capacity#use-the-waiting-list)

![](https://cdn.document360.io/e2b87f73-d9f5-43cb-8182-2641762664fd/Images/Documentation/handle-lack-of-capacity-image-wg90zdty.png?sv=2026-02-06&spr=https&st=2026-11-06T20%3A13%3A37Z&se=2026-11-06T21%3A13%3A37Z&sr=c&sp=r&sig=yqvpkXEu9u3DyI5WMExN65ru03yJPVmmZfuv3iyDjXk%3D)

## Reduce ad spaces

> [!NOTE]
> Note
> 
> Note that reducing ad spaces is only possible if there's at least one free ad space.

Reducing ad spaces means that the system removes any ad spaces that aren't available at the selected time.

You can see the number of booked ad spaces and available ad spaces in the dialog.

To reduce the ad spaces to available ones, perform the following steps:

1. In the **Fully booked ad-spaces** dialog, select **Reduce ad-spaces**.
2. Click **Save**.
3. In the subsequent dialog, click **Yes** to confirm.

## Use the waiting list

> [!NOTE]
> Note
> 
> Note that your administrator must [enable the waiting list feature](/grassfish/docs/set-dooh-system-parameters) in your network.

You can put a booking on the [waiting list](/grassfish/docs/manage-booking-states), if you want to reserve it but there's not enough capacity at that time.

If the required ad space becomes available, the oldest booking on the waiting list is automatically reserved, then the next oldest booking, and so forth.

To put a booking on the waiting list, perform the following steps:

1. In the **Fully booked ad-spaces** dialog, select **Set to waiting list**.
2. Click **Save**.