Streaming API Developer Guide

Getting Started with Streaming API
Code Examples
Client Connection Considerations
PushTopic Events
Working with PushTopics
PushTopic Considerations
PushTopic Streaming Allocations
Reference: PushTopic
Generic Events
Monitoring Event Usage
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PushTopic Streaming Allocations

These default allocations apply to consumers of PushTopic Streaming in all API versions.
Description Performance and Unlimited Editions Enterprise Edition All other supported editions
Maximum number of topics (PushTopic records) per org 100 50 40
Maximum number of concurrent clients (subscribers) across all channels and for all event types 2,000 1,000 20
Maximum number of delivered event notifications within a 24-hour period, shared by all CometD clients 1,000,000 200,000 50,000 (10,000 for free orgs)
Socket timeout during connection (CometD session) 110 seconds 110 seconds 110 seconds
Timeout to reconnect after successful connection (keepalive) 40 seconds 40 seconds 40 seconds
Maximum length of the SOQL query in the Query field of a PushTopic record 1,300 characters 1,300 characters 1,300 characters
Maximum length for a PushTopic name 25 characters 25 characters 25 characters

For free orgs, the maximum number of events within a 24-hour period is 10,000. Free orgs include Developer Edition orgs and trial orgs (all editions), such as partner test and demo orgs created through the Environment Hub. Sandboxes get the same allocations as their associated production orgs.

Note

If your application exceeds these allocations, or you have scenarios for which you need to increase the number of concurrent clients, contact Salesforce.