Buffer wait events result from a contention in accessing database block buffers; for example, if the requested data block is in an incompatible mode (buffer busy), or if the buffer does not contain sufficient disk space for reading the data block (free buffer).
The process by which Foglight for Oracle determines the maximum and minimum values for every dataflow on the home page, by observing data moving through the database system. This information helps Foglight for Oracle display the data flows correctly.
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