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Type: Bug
Resolution: Fixed
Priority: Major - P3
Fix Version/s: 3.6.17, 4.3.1, 4.2.3, 4.0.14
Affects Version/s: None
Component/s: Aggregation Framework
Labels:
None

Backwards Compatibility:
Fully Compatible
Operating System:
ALL
Backport Requested:

v4.2, v4.0, v3.6, v3.4
Sprint:
Query 2019-11-18
Case:
Confidence Status:
None
Work Order:
3
CAR Domain/s:
None

Aha! Reference:
None
Tracking Level:
None
Risk Status:
None
Exec Notes:
None
Goal Name(s):
None
Goal Link:
None

SERVER-43944 describes a more pervasive problem, but it's probably the case that $push and $addToSet are the worst offenders and not too difficult to fix. Let's start with those two and leave SERVER-43944 to track the more general problem which is likely more complex.

is related to

SERVER-16284 Allow for $pushall / $push with $each to allow pushing all elements of array in $group

Closed

related to

SERVER-43944 Accumulators (and possibly expressions) can allocate large amounts of memory

Backlog

SERVER-73315 Guardrail to prevent an accumulator from using too much memory is ineffective when DocumentSourceGroup spills to disk

Closed

SERVER-44869 Add query knob to control memory limit for $push and $addToSet

Closed

SERVER-49027 Extend $group explain execution stats to report memory consumption per accumulator

Closed

Assignee:: Charlie Swanson
Reporter:: Charlie Swanson
Participants:: Andrii Litvinov, Charlie Swanson, Githook User
Votes:: 0 Vote for this issue
Watchers:: 11 Start watching this issue

Created:: Oct 23 2019 03:24:28 PM UTC
Updated:: May 20 2025 03:14:18 PM UTC
Resolved:: Nov 09 2019 01:39:39 AM UTC
Confidence Status Last Update:: 08/Nov/19 12:03 AM

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