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Type: Bug
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Resolution: Won't Fix
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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: Sharding
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None
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Sharding
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ALL
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As far as I can see, a jumbo chunk is only marked as such when the balancer has attempted to migrate it to another shard (Chunk::markAsJumbo is only called from Balancer::_moveChunks).
This means that there's no indication of jumbo chunks unless:
- chunk imbalance has grown past the threshold at which the balancer tries to move chunks, and
- the balancer has attempted to move a jumbo chunk to redress the imbalance
It would be good to have more comprehensive and early warning of jumbo chunks. This checking could perhaps be added to the splitVector handling in mongod.
- is related to
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SERVER-21931 Only mark chunks as jumbo if split fails because the chunk is too large
- Closed
- related to
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SERVER-44088 Autosplitter seems to ignore some fat chunks
- Closed
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SERVER-13024 Clear the 'jumbo' flag from the chunk document when the chunk is no longer over-sized
- Blocked