[SERVER-45614] Tailor snapshot window to resize according to cache pressure measured against MongoDB v4.4's WT version Created: 16/Jan/20  Updated: 27/Oct/23  Resolved: 20/Jul/20

Status: Closed
Project: Core Server
Component/s: Storage
Affects Version/s: None
Fix Version/s: None

Type: Task Priority: Major - P3
Reporter: Dianna Hohensee (Inactive) Assignee: Backlog - Storage Execution Team
Resolution: Gone away Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Assigned Teams:
Storage Execution
Participants:

 Description   

The LAS table is going away in v4.4 and being replaced by a history table. The snapshot window is currently resized based on in-memory cache pressure, which is indicated by stats around reading/writing from/to the LAS table rather than the in-memory WT cache. With MongoDB v4.4's WT, we will likely need a new solution for snapshot window resizing.



 Comments   
Comment by Connie Chen [ 20/Jul/20 ]

This was subsumed by the long-running snapshot reads project

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