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Type: Improvement
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Resolution: Fixed
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Priority: Minor - P4
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Affects Version/s: None
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Component/s: Diagnostics, Sharding
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None
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Fully Compatible
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v4.0, v3.6
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Sharding 2018-07-16
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0
The (uncompressed) changelog and actionlog size is currently 10MB and 2MB respectively.
On busy clusters (many concurrent chunk migrations and splits), I have seen the changelog window shrink to ~2 hours.
For diagnostic purposes it would be useful to increase the changelog and actionlog size to hold a longer time window.
Suggested sizes:
- changelog: 200 MB (20x)
- actionlog: 20 MB (10x, as it tends to be less subject to writes in a busy cluster)