[DOCS-14154] [Atlas] The incorrect WiredTiger cache size for Atlas M30 or lower Clusters. Created: 25/Jan/21  Updated: 29/Oct/23  Resolved: 10/Feb/21

Status: Closed
Project: Documentation
Component/s: Atlas
Affects Version/s: None
Fix Version/s: None

Type: Improvement Priority: Major - P3
Reporter: Seunghyoung Lee Assignee: Corry Root
Resolution: Fixed Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Participants:
Days since reply: 3 years, 1 day ago
Story Points: 1

 Description   

Description

Documentation Link - https://docs.atlas.mongodb.com/sizing-tier-selection#memory

Hello Team,

Recently, I have discussed the above document with one of WiredTiger experts and we strongly believe the below information is very misleading:

WiredTiger dedicates 50% of physical RAM for the WiredTiger cache.

Actually, this is not the case for Atlas M30 or lower Clusters based on the Cloud Provider Instance Size Specifications.

So, we think this comment could completely confuse our customer's calculations for their working set on Atlas clusters.

Therefore, could we please change it to something like this to avoid any misleading?

By default, for M40 or Larger Clusters, WiredTiger dedicates 50% of physical RAM for the WiredTiger cache.

Scope of changes

Impact to Other Docs

MVP (Work and Date)

Resources (Scope or Design Docs, Invision, etc.)



 Comments   
Comment by Seunghyoung Lee [ 09/Feb/21 ]

corry.root Thank you for the update. It looks good to me.

Comment by Corry Root [ 08/Feb/21 ]

seunghyoung.lee, the existing memory information applied only to M40 or larger clusters, but did not clarify. I updated the memory information to specify the information applies to M40 or larger clusters by default.

STAGE

BUILD

Comment by Corry Root [ 08/Feb/21 ]

jeffrey.allen, the existing memory information applied only to M40 or larger clusters, but did not clarify. I updated the memory information to specify the information applies to M40 or larger clusters by default.

STAGE

BUILD

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