[AMQ-4758] Improve performance of pull consumers

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 5.8.0
• Fix Version/s: 5.9.0
• Assignee: Dejan Bosanac
• Reporter: Dejan Bosanac
• Created: 01/Oct/13 10:19
• Updated: 01/Oct/13 10:23
• Resolved: 01/Oct/13 10:23

Description

When we have a queue with only pull consumers (prefetch 0), there are a lot of necessary work being done trying to dispatch every paged message to every consumer. The problem is that most of consumers are full all the time and we lose a lot of cpu time trying to traverse all messages. The problem is more apparent with large number of paged messages.