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    Type:Improvement 
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    Resolution: Won't Fix
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    Priority:Major - P3 
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    Affects Version/s: None
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    Component/s: None
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Review the minimum cache size in automated test runs of test/format, which was set to 20MB following a decision not to fix the problem in WT-3698.
The reason the minimum size is configured is because lookaside usage can pin internal pages in cache - and some test format workloads end up with the cache stuck full of internal pages when configuring tiny caches.