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Type:
Improvement
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Resolution: Unresolved
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Priority:
Major - P3
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None
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Affects Version/s: None
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Component/s: None
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RSS Sydney
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RSS Sydney - 2024-06-25, RSS Sydney - 2024-07-09, RSS Sydney - 2024-07-23, RSS Sydney - 2024-12-10
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(copied to CRM)
We maintain an unbounded cache of WiredTiger sessions. And each of these sessions has a cursor cache.
Because we asynchronously release sessions into the cache without a ticket, we can accumulate more sessions than the execution control system can limit.
The current limit is just a 5 minute idle timeout.
The size of these idle sessions can affect WiredTiger performance in some algorithms. We should impose a limit on the number of cached sessions and also expose metrics about the size of these caches.
There is some discussion here in SERVER-84449.
- is related to
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SERVER-82688 mongod crash, bug fix when connections > wiredtiger's session_max
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- Blocked
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SERVER-84449 High WiredTiger session concurrency can increase replication write latency
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- Open
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- Backlog
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