Using arithmetic expressions

This topic helps you to derive new composite attributes by using existing attributes.

Deriving a new attribute by using an existing attribute

To derive a new attribute by using an existing attribute, use an arithmetic expression in PATROL for Composite Attributes. Here is an example to derive a new attribute by using an existing attribute: 

Expression to derive a new attribute:

Attribute <Arithmetic operator> Constant value

Example: MemoryUsed / 1024

Deriving a new attribute by using a combination of existing attributes

To derive a new attribute by using a combination of existing attributes, use an arithmetic expression in PATROL for Composite Attributes. Here is an example to derive a new attribute by using a combination of two or more existing attributes:

Expressions to derive a new attribute:

• (Attribute <Arithmetic operator> Attribute <Arithmetic operator> (Attribute <Arithmetic operator> Constant value) 

Example: SpaceUsed + SpaceAllocated + (SpaceLeftPct / 100)

• (Attribute <Arithmetic operator> Attribute) <Arithmetic operator> (Attribute <Arithmetic operator> Attribute)

Example: (WriteBytes + ReadBytes) / (WriteOps + ReadOps)