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Type: Bug
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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: 4.2.24, 4.4.24, 6.0.10, 5.0.21, 7.1.0-rc2
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Component/s: None
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None
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Query Optimization
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ALL
In SERVER-35905 we added a logic to partition a $merge stage on the shards.
This logic requires scanning the entire routing table for the collection that before 7.0+ could potentially contain millions of entry.
For collections of large number of chunks, this logic could take seconds to be executed.
Additionally, this logic is creating a vector of the size of the routing table, potentially consuming several GBs of RAM.
- is caused by
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SERVER-35905 Plug pieces together to perform a distributed $exchange when applicable
- Closed