...

/

Bifurcation, Cartesian, Correlated, Galois, Indexical

Bifurcation, Cartesian, Correlated, Galois, Indexical

This lesson introduces the following analysis patterns: bifurcation point, Cartesian trace, correlated discontinuity, Galois trace, indexical trace.

Bifurcation point

The following two software traces from working and non-working software environments are a perfect example of the pattern. We borrow the name of bifurcation point pattern from catastrophe theory:

First, we notice that in both of the traces above, the PIDs are the same (2768 and 3756). Thus, we can conclude that it is most likely that both traces came from the same environment and session. Second, messages A, B, C, and so on up to messages X and Y are identical. The latter two messages differ significantly in their query results XXX and YYY. After that, the message distribution varies greatly in both size and content. Despite the same tracing time—15 seconds—the statement current is 155 msg/s for the working and 388 msg/s for the non-working case.

We can easily observe bifurcation points when tracing a small noise ratio. For example, ...