[SERVER-36068] Expose a user-accessible cursor option to avoid caching data from reads Created: 11/Jul/18  Updated: 29/Oct/23  Resolved: 20/Nov/18

Status: Closed
Project: Core Server
Component/s: Querying
Affects Version/s: None
Fix Version/s: 4.1.6

Type: Improvement Priority: Major - P3
Reporter: Tess Avitabile (Inactive) Assignee: Matthew Russotto
Resolution: Fixed Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
Depends
depends on SERVER-36631 Have the storage engine interface exp... Closed
depends on WT-4090 Low priority reads Closed
depends on SERVER-37590 Investigate performance implications ... Closed
depends on SERVER-37550 Relax rules on setting readOnce flag ... Closed
is depended on by SERVER-36537 Initial sync cursor should not keep d... Closed
is depended on by SERVER-39295 Use readOnce: true for $sample cursors Blocked
Backwards Compatibility: Fully Compatible
Sprint: Repl 2018-11-19, Repl 2018-12-03
Participants:

 Description   

Expose a MongoDB cursor option to tell the storage engine that data from this cursor should not be pinned in cache.



 Comments   
Comment by Tess Avitabile (Inactive) [ 20/Nov/18 ]

That's correct, we are not planning to document this feature.

Comment by Matthew Russotto [ 20/Nov/18 ]

tess.avitabile
I've marked ths as not needing documentation on the assumption that we're not making this a public feature yet; that will need to be changed if I'm wrong about that.

Comment by Githook User [ 20/Nov/18 ]

Author:

{'name': 'Matthew Russotto', 'email': 'matthew.russotto@10gen.com', 'username': 'mtrussotto'}

Message: SERVER-36068 Expose a user-accessible cursor option to avoid caching data from reads
Branch: master
https://github.com/mongodb/mongo/commit/0248ed957eb3892aeccc34ba89e4b768ca296dfc

Comment by Daniel Pasette (Inactive) [ 12/Jul/18 ]

if exposed to users, this would be an option (default to false) passed in to the query 

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