[SERVER-68591] Temporarily switch to scanning the row store when encounter data that cannot be served from CSI Created: 05/Aug/22  Updated: 29/Oct/23  Resolved: 27/Dec/22

Status: Closed
Project: Core Server
Component/s: None
Affects Version/s: None
Fix Version/s: 6.3.0-rc0

Type: Improvement Priority: Major - P3
Reporter: Justin Zhang (Inactive) Assignee: Irina Yatsenko (Inactive)
Resolution: Fixed Votes: 0
Labels: pm2646-m4
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Issue Links:
Depends
is depended on by SERVER-69105 Achieve column index performance acce... Closed
Duplicate
is duplicated by SERVER-67142 Add heuristic for avoiding column sto... Closed
Problem/Incident
Backwards Compatibility: Fully Compatible
Sprint: QE 2022-09-19, QE 2022-10-03, QE 2022-10-17, QE 2022-10-31, QE 2022-11-14, QE 2022-11-28, QE 2022-12-12, QE 2022-12-26, QE 2023-01-09
Participants:
Linked BF Score: 35

 Description   
  • Calls the next() method for the row store cursor, as opposed to continuously seeking, in order to reduce time taken during COLUMN_SCAN
  • Processes records in batches. For each batch, we consider a sample size, and if that sample size reaches a certain amount of row store calls, we automatically defer to row store for the rest of the batch.


 Comments   
Comment by Githook User [ 27/Dec/22 ]

Author:

{'name': 'Irina Yatsenko', 'email': 'irina.yatsenko@mongodb.com', 'username': 'IrinaYatsenko'}

Message: SERVER-68591: Switch to rowstore scan mode on reading data that cannot be served by CSI
Branch: master
https://github.com/mongodb/mongo/commit/33f73a7180873f5cbeb190f0dba6cd9f46390a62

Comment by Githook User [ 23/Dec/22 ]

Author:

{'name': 'liubov.molchanova', 'email': 'liubov.molchanova@mongodb.com', 'username': 'liubov-molchanova'}

Message: Revert "SERVER-68591: Switch to rowstore scan mode on reading data that cannot be served by CSI"

This reverts commit 8583f66c0126e3d5ddf25c62a242b01c3d82bc19.
Branch: master
https://github.com/mongodb/mongo/commit/e91c301c45b8293c2c9e50b9bdfef186433c1a44

Comment by Githook User [ 22/Dec/22 ]

Author:

{'name': 'Irina Yatsenko', 'email': 'irina.yatsenko@mongodb.com', 'username': 'IrinaYatsenko'}

Message: SERVER-68591: Switch to rowstore scan mode on reading data that cannot be served by CSI
Branch: master
https://github.com/mongodb/mongo/commit/8583f66c0126e3d5ddf25c62a242b01c3d82bc19

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