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Type: Improvement
Resolution: Won't Do
Priority: Major - P3
Fix Version/s: features we're not sure of
Affects Version/s: None
Component/s: Performance, Replication
Labels:
- mongos
- performance
Environment:
Any replica set environment

Assigned Teams:

Replication
Confidence Status:
None
Work Order:
3
CAR Domain/s:
None

Aha! Reference:
None
Tracking Level:
None
Risk Status:
None
Exec Notes:
None
Goal Name(s):
None
Goal Link:
None

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.

Assignee:: [DO NOT USE] Backlog - Replication Team
Reporter:: Matic
Participants:: [DO NOT USE] Backlog - Replication Team, Matic
Votes:: 1 Vote for this issue
Watchers:: 4 Start watching this issue

Created:: Sep 12 2011 07:22:57 AM UTC
Updated:: Dec 06 2022 05:40:45 AM UTC
Resolved:: May 27 2022 06:55:42 PM UTC

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