[SERVER-3806] Better replica set cache efficiency Created: 12/Sep/11  Updated: 06/Dec/22  Resolved: 27/May/22

Status: Closed
Project: Core Server
Component/s: Performance, Replication
Affects Version/s: None
Fix Version/s: features we're not sure of

Type: Improvement Priority: Major - P3
Reporter: Matic Assignee: Backlog - Replication Team
Resolution: Won't Do Votes: 1
Labels: mongos, performance
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified
Environment:

Any replica set environment


Assigned Teams:
Replication
Participants:

 Description   

http://groups.google.com/group/mongodb-user/browse_thread/thread/ded206b11dd9a31f

In a nutshell, all (slave?) nodes in a replica set cache the same documents, because Mongos spreads the load across all slave nodes. This causes severe cache duplication, which leads to wasted resources (RAM) and increases IO load.


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