Streaming API Limits

Limits protect shared resources.
Description Limit
Maximum number of topics 20
Maximum number of clients (subscribers) per topic 10
Maximum number of concurrent clients (subscribers) across all topics 10
Maximum number of events per day 1,000 for free organizations; 10,000 for all other organizations
Socket timeout during connection (CometD session) 110 seconds
Timeout to reconnect after successful connection (keepalive) 40 seconds
Timeout for session, regardless of activity (maximum CometD session) 3600 seconds
Maximum length of the SOQL query in the Query field of a PushTopic record 1300 characters
Maximum length for a PushTopic name 25 characters
Note
To increase the number of clients per topic or the number of concurrent clients across all topics, please contact salesforce.com.
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