[SERVER-25536] Investigate performance impact of parsing pipeline within the collection lock Created: 10/Aug/16  Updated: 09/Dec/16  Resolved: 09/Dec/16

Status: Closed
Project: Core Server
Component/s: Aggregation Framework, Performance
Affects Version/s: None
Fix Version/s: None

Type: Task Priority: Major - P3
Reporter: Charlie Swanson Assignee: Charlie Swanson
Resolution: Won't Fix Votes: 0
Labels: None
Remaining Estimate: Not Specified
Time Spent: Not Specified
Original Estimate: Not Specified

Sprint: Query 2016-12-12
Participants:

 Description   

We moved the parsing of the aggregation pipeline to within the collection lock as part of SERVER-25038. On storage engines that support document-level locking, this isn't likely to be a problem, since the lock will only be an intent lock. On storage engines like MMAPv1, there may be some noticeable overhead, which we should investigate and maybe attempt to mitigate.


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