Sun GlassFish Message Queue 4.4 Developer's Guide for C Clients

Durable and Non-Durable Subscriptions

Subscribers to a topic destination have either durable or non-durable subscriptions. Durable subscriptions provide increased reliability at the cost of slower throughput for the following reasons:

For nonpersistent messages, performance is about the same for durable and non durable subscriptions. For persistent messages, performance is about 20% lower for durable subscriptions than for nondurable subscriptions.