vmcj/prof/maxAge is a SAP Parameter attribute which is used to control Max age of VMC profiling sessions information. This is available within R/3 SAP systems depending on the version and release level.
Below is the standard documentation available and a few details of the attributes values .
This parameter specifies the age that a VMC profiling session can reach
before it is automatically deleted. The current sessions can be viewed
using transaction SM53 - Profiling.
The specified age muss be at least 1 hour. Due to security reasons,
deletion is not possible if the profiling data is not located in a
subdirectory of the instance data directory.
Syntax of parameter
<(><<)>value> [time unit] You can specify the following time units: M
for minutes, H for hours, or D for day. If nothing is specified, days
are used as the unit.
Example
vmcj/prof/maxAge = 30 -> 30 days
vmcj/prof/maxAge = 2 H -> 2 hours
See SAP Parameter Documentation for full SAP documentation for this profile parameter.