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robece committed May 9, 2023
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119 changes: 119 additions & 0 deletions articles/event-grid/includes/limits.md
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---
title: include file
description: include file
services: event-grid
author: robece
ms.service: event-grid
ms.topic: include
ms.date: 05/09/2023
ms.author: robece
ms.custom: include file
---

> [!NOTE]
> The following limits listed in this article are per region.
## Namespace resource limits

[Azure Event Grid namespaces](concepts.md#namespaces) is available in public preview and enables MQTT messaging, and HTTP pull delivery.
The following limits apply to namespace resources in Azure Event Grid.

| Limit description | Limit |
|----------------------------------------|-------|
| Namespaces per Azure subscription | 10 |
| Maximum throughput units per namespace | 20 |

## Throughput unit limits for MQTT Messages in namespaces

A single [throughput unit](concepts.md#throughput-units) lets you:

| Limit description | Limit |
|-------------------|----------------------------------------------------------------------------|
| MQTT Clients | 10,000 |
| Receive | Up to 1,000 messages per second or 1 MB per second (whichever comes first) |
| Deliver/Consume | Up to 1,000 events per second or 1 MB per second |

## Throughput unit limits for Events in namespaces

A single [throughput unit](concepts.md#throughput-units) lets you:

| Limit description | Limit |
|-------------------|--------------------------------------------------------------------------|
| Event topics | 1,000 |
| Receive | Up to 1,000 events per second or 1 MB per second (whichever comes first) |
| Deliver/Consume | Up to 2,000 events per second or 2 MB per second |

## Topic and subscription resource limits in namespaces

The following limits apply to topic and subscription resources in Azure Event Grid namespaces.

| Limit description | Limit |
|-------------------------------------------------------|---------|
| Event topics per namespace | 100,000 |
| Event duration period in topic | 1 day |
| Subscriptions per topic | 500 |
| Connected clients per namespace (queue subscriptions) | 5,000 |

## Event limits in namespaces

The following limits apply to events in Azure Event Grid namespaces.

| Limit description | Limit |
|--------------------|-------|
| Event size | 1 MB |
| Batch size | 1 MB |
| Events per request | 5,000 |

## MQTT resource limits

The following limits apply to MQTT resources in Azure Event Grid namespaces.

| Limit description | Limit |
|---------------------|---------|
| Clients | 100,000 |
| CA certificates | 2 |
| Client groups | 10 |
| Topic spaces | 10 |
| Topic templates | 10 |
| Permission bindings | 100 |

## MQTT messages limits

The following limits apply to MQTT messages in Azure Event Grid namespaces.

| Limit description | Limit |
|----------------------------------------------|-------------------------------------------|
| Max message size | 512 KiB |
| Topic size | 256 B |
| Topic alias | 10 topic aliases |
| New connect requests | 500 requests per second? Per TU / per NS? |
| Subscribe requests | 5,000 requests per second |
| Total number of subscriptions per connection | 50 |

## Custom topic, system topic and partner topic resource limits

The following limits apply to custom topic, system topic and partner topic resources in Azure Event Grid.

| Limit description | Limit |
|--------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------|
| Custom topics per Azure subscription | 100<br/>When the limit is reached, you can consider a different region or consider using domains, which can support 100,000 topics. |
| Event subscriptions per topic | 500<br/>This limit can’t be increased. |
| Publish rate for a custom or a partner topic (ingress) | 5,000 events per second or 5 MB per second (whichever comes first) |
| Event size | 1 MB<br/>This limit can’t be increased. |
| Number of incoming events per batch | 5,000<br/>This limit can’t be increased |
| Private endpoint connections per topic | 64<br/>This limit can’t be increased |
| IP Firewall rules per topic | 128 |

## Domain resource limits

The following limits apply to Domain resources in Azure Event Grid.

| Limit description | Limit |
|-----------------------------------------------|--------------------------------------------------------------------|
| Domains per Azure subscription | 100 |
| Topics per domain | 100,000 |
| Event subscriptions per topic within a domain | 500<br/>This limit can’t be increased |
| Domain scope event subscriptions | 50<br/>This limit can’t be increased |
| Publish rate for a domain (ingress) | 5,000 events per second or 5 MB per second (whichever comes first) |
| Private endpoint connections per domain | 64 |
| IP Firewall rules per topic | 128 |
108 changes: 1 addition & 107 deletions articles/event-grid/quotas-limits.md
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This article lists quotas and limits in Azure Event Grid.

> [!NOTE]
> The following limits listed in this article are per region.
## Namespace resource limits

[Azure Event Grid namespaces](concepts.md#namespaces) is available in public preview and enables MQTT messaging, and HTTP pull delivery.
The following limits apply to namespace resources in Azure Event Grid.

| Limit description | Limit |
|----------------------------------------|-------|
| Namespaces per Azure subscription | 10 |
| Maximum throughput units per namespace | 20 |

## Throughput unit limits for MQTT Messages in namespaces

A single [throughput unit](concepts.md#throughput-units) lets you:

| Limit description | Limit |
|-------------------|----------------------------------------------------------------------------|
| MQTT Clients | 10,000 |
| Receive | Up to 1,000 messages per second or 1 MB per second (whichever comes first) |
| Deliver/Consume | Up to 1,000 events per second or 1 MB per second |

## Throughput unit limits for Events in namespaces

A single [throughput unit](concepts.md#throughput-units) lets you:

| Limit description | Limit |
|-------------------|--------------------------------------------------------------------------|
| Event topics | 1,000 |
| Receive | Up to 1,000 events per second or 1 MB per second (whichever comes first) |
| Deliver/Consume | Up to 2,000 events per second or 2 MB per second |

## Topic and subscription resource limits in namespaces

The following limits apply to topic and subscription resources in Azure Event Grid namespaces.

| Limit description | Limit |
|-------------------------------------------------------|---------|
| Event topics per namespace | 100,000 |
| Event duration period in topic | 1 day |
| Subscriptions per topic | 500 |
| Connected clients per namespace (queue subscriptions) | 5,000 |

## Event limits in namespaces

The following limits apply to events in Azure Event Grid namespaces.

| Limit description | Limit |
|--------------------|-------|
| Event size | 1 MB |
| Batch size | 1 MB |
| Events per request | 5,000 |

## MQTT resource limits

The following limits apply to MQTT resources in Azure Event Grid namespaces.

| Limit description | Limit |
|---------------------|---------|
| Clients | 100,000 |
| CA certificates | 2 |
| Client groups | 10 |
| Topic spaces | 10 |
| Topic templates | 10 |
| Permission bindings | 100 |

## MQTT messages limits

The following limits apply to MQTT messages in Azure Event Grid namespaces.

| Limit description | Limit |
|----------------------------------------------|-------------------------------------------|
| Max message size | 512 KiB |
| Topic size | 256 B |
| Topic alias | 10 topic aliases |
| New connect requests | 500 requests per second? Per TU / per NS? |
| Subscribe requests | 5,000 requests per second |
| Total number of subscriptions per connection | 50 |

## Custom topic, system topic and partner topic resource limits

The following limits apply to custom topic, system topic and partner topic resources in Azure Event Grid.

| Limit description | Limit |
|--------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------|
| Custom topics per Azure subscription | 100<br/>When the limit is reached, you can consider a different region or consider using domains, which can support 100,000 topics. |
| Event subscriptions per topic | 500<br/>This limit can’t be increased. |
| Publish rate for a custom or a partner topic (ingress) | 5,000 events per second or 5 MB per second (whichever comes first) |
| Event size | 1 MB<br/>This limit can’t be increased. |
| Number of incoming events per batch | 5,000<br/>This limit can’t be increased |
| Private endpoint connections per topic | 64<br/>This limit can’t be increased |
| IP Firewall rules per topic | 128 |

## Domain resource limits

The following limits apply to Domain resources in Azure Event Grid.

| Limit description | Limit |
|-----------------------------------------------|--------------------------------------------------------------------|
| Domains per Azure subscription | 100 |
| Topics per domain | 100,000 |
| Event subscriptions per topic within a domain | 500<br/>This limit can’t be increased |
| Domain scope event subscriptions | 50<br/>This limit can’t be increased |
| Publish rate for a domain (ingress) | 5,000 events per second or 5 MB per second (whichever comes first) |
| Private endpoint connections per domain | 64 |
| IP Firewall rules per topic | 128 |
[!INCLUDE [limits](./includes/limits.md)]

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