[CARBONDATA-3321] Improve Single/Concurrent query performance

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.5.3
• Assignee: Unassigned
• Reporter: Kumar Vishal
• Created: 21/Mar/19 18:21
• Updated: 22/Mar/19 05:57
• Resolved: 22/Mar/19 05:57

Description

When number of Segments are high Single/Concurrent query is slow. because of below reason 

1. Memory footprint is more because of this gc is more and reducing query performance
2. Converting to Unsafe data map row to safe data map during pruning 
3. Multi threaded pruning in case of non filter query is not supported 
4. Retrieval from unsafe data map row is slower 

Issue Links

• links to: GitHub Pull Request #3154