Foglight for Oracle (Cartridge) 5.9.4.10 - User Guide

Schema Locks

A lock mode that is used when compiling a query, to prevent changes to the underlying tables structures while the query is compiled.

Sequential Read

I/O operation in which disk blocks (usually single blocks) are read in sequence into contiguous memory space. This is typical of the I/O that results, for example, from using indexes.

Severity

Represents how critical an alarm is. A severity determines how Foglight for Oracle behaves when the values for a metric fall within a user-defined range of values. A severity specifies whether the information returned in the metric represents normal or abnormal behavior for the system under diagnosis. For example, unusually high values might mean that a metric has crossed a threshold into a high severity state. This, in turn, could change the color of a component on the home page; for example, from orange to red when moving from a critical to a fatal state.

The severity determines what action Foglight for Oracle takes when a metric value falls into the range defined by a threshold.

Spinner

A Spinner displays the current level of activity for a statistic that is not directional. As the load increases, so too does the speed of the spin. If the statistic represented by the flow crosses another threshold, the spinner may change color. The combination of movement and color makes it easy to spot congested areas.