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Memory Dump Analysis Anthology, Volume 7 by Dmitry Vostokov

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Sheaf of Activities

Inter-Correlation (Volume 4, page 350) analysis between a normal and a problem logs to find a Bifurcation Point (Volume 4, page 343, and a possible root cause) becomes a difficult task when both traces come from different environments with widely differing Background Components (Volume 5, page 287). Here a new analysis pattern with a name borrowed from sheaves58 from mathematics can help. Basically this pattern is also a tool in tracking properties of trace message subsets. First we find out important message types around some Activity Region (Volume 4, page 348) where we hope to find a difference between two traces:

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