[SERVER-77688] Consider bypassing ticket acquisition for locks in hot sharding codepaths Created: 01/Jun/23  Updated: 26/Oct/23

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

Type: Task Priority: Major - P3
Reporter: Pierlauro Sciarelli Assignee: Backlog - Catalog and Routing
Resolution: Unresolved Votes: 0
Labels: oldshardingemea, shardingemea-qw
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Assigned Teams:
Catalog and Routing
Participants:
Story Points: 3

 Description   

Some locks acquired/release by the internal sharding machinery are "hot" because user operations may be impacted when the acquisition/release is delayed because of tickets unavailability. An example of sensible path is the acquisition/release of the critical section.

Purpose of this task is to identify such hot paths and consider using ScopedAdmissionPriorityForLock in order to bypass ticketing, similarly to what has been committed under SERVER-76835 to avoid unnecessarily blocking metadata refreshing.


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