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title description services author ms.service ms.topic ms.date ms.author ms.custom
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event-grid
tfitzmac
event-grid
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05/22/2019
tomfitz
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The following limits apply to Azure Event Grid system topics and custom topics, not event domains.

Resource Limit
Custom topics per Azure subscription 100
Event subscriptions per topic 500
Publish rate for a custom topic (ingress) 5,000 events per second per topic
Publish requests 250 per second
Event size Support for 64 KB in General Availability (GA). Support for 1 MB is currently in preview.

The following limits apply to event domains only.

Resource Limit
Topics per event domain 100,000
Event subscriptions per topic within a domain 500
Domain scope event subscriptions 50
Publish rate for an event domain (ingress) 5,000 events per second
Publish requests 250 per second
Event Domains per Azure Subscription 100
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