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Type: Improvement
Resolution: Unresolved
Priority: Major - P3
Fix Version/s: None
Affects Version/s: None
Component/s: None
Labels:

Assigned Teams:

Storage Engines, Storage Engines - Server Integration
CAR Domain/s:
None

Aha! Reference:
None
Tracking Level:
None
Risk Status:
None
Exec Notes:
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Goal Name(s):
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The default WiredTiger session max is 33000. This level of concurrency is unheard of, and nearly impossible due to the ticket mechanism. There are two main challenges, however:
1. There is no limit on idle multi-doc transactions.
2. If we hit the session limit, internal operations will start failing, which will affect system availability.

The first problem should be addressed in SERVER-108215
The second problem should be addressed in this ticket. Impose soft-limits on user sessions and reserve a portion for internal operations.

depends on

SERVER-110322 Better handling for running out of WT sessions

Open

is depended on by

SERVER-108215 Impose limits on the number of active multi-document transactions

Blocked

related to

SERVER-110801 Keep the maximum number of spill WT sessions in sync with the maximum number of main WT sessions

Open

WT-15574 Dynamically allocate WT_SESSIONs internally for session_max

Needs Scheduling

Assignee:: Unassigned
Reporter:: Louis Williams
Participants:: Louis Williams
Votes:: 0 Vote for this issue
Watchers:: 12 Start watching this issue

Created:: Jul 28 2025 06:00:52 PM UTC
Updated:: Sep 26 2025 01:17:01 AM UTC

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