Streaming API Limits | Force.com Streaming API Developer Guide

Limits protect shared resources. These default limits are for basic consumers of Streaming API.

If your application exceeds these limits, or you have scenarios for which you need to increase the number of clients per topic or the number of concurrent clients across all topics, contact Salesforce.

PushTopic Streaming Limits

The following limits apply to 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 clients (subscribers) per topic	2,000	1,000	20
Maximum number of concurrent clients (subscribers) across all topics	2,000	1,000	20
Maximum number of events within a 24–hour period	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 limits as their associated production orgs.

Note

Generic Streaming Limits

Description	Performance and Unlimited Editions	Enterprise Edition	Professional Edition	Free Orgs
Maximum streaming channels per org	1,000	1,000	1,000	200
Maximum events within a 24-hour period with Generic Streaming (API version 36.0 and earlier)	100,000	100,000	100,000	10,000
Maximum events within a 24-hour period with Durable Generic Streaming (API version 37.0 and later)	1,000,000	200,000	100,000	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 limits as their associated production orgs.

Note

Generic Streaming has the same limits for the maximum number of clients and maximum number of concurrent clients as PushTopic Streaming. The following limits apply to Generic Streaming and Durable Generic Streaming.

Description	Performance and Unlimited Editions	Enterprise Edition	All other supported editions
Maximum clients (subscribers) per generic streaming channel	2,000	1,000	20
Maximum concurrent clients (subscribers) across all generic streaming channels	2,000	1,000	20