[DRILL-4462] Slow JOIN Query On Remote MongoDB

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.5.0
• Component/s: Client - CLI, Storage - MongoDB
• Flags: Important
• Assignee: Unassigned
• Reporter: Rifat Mahmud
• Created: 02/Mar/16 04:54
• Updated: 18/Nov/16 05:39

Description

Regardless of the number of collections in the MongoDB database, simple join query, like select * from t1, t2 where t1.a=t2.b is taking on and around 27 seconds from drill-embedded running on a single machine.
Here are the profiles:
https://drive.google.com/open?id=0B-J_8-KYz50mZ1NjSzlUUjR3Q0U
https://drive.google.com/open?id=0B-J_8-KYz50mcTFpRmxKOWdfak0

Screenshot of fragment profile has been attached.