Alert parameter functions

Hi

I am trying to set Threshold value for below few parameters so that alerts can be
sent to email address. i could not find what values to be input for below parameters.

From Alert tab, configure check settings ->configure check threshold tab, i have below parameters

Check index Server allocated heap memory
->I know my index server allocated heap memory, but how to find the percent?
which value has to be decided
Check index Server used heap memory
->simmilarly i know used heap memory for index server, but how to find percent?

Can you tell me where to find the value for below parameters.
Check last save point time(in mintue)
->which parameter values has to be confirmed?
Check Number of connections
->which parameter values has to be confirmed?
Check record count of column table partition
->which parameter values has to be confirmed?
Check size of delta memory
->which parameter values has to be confirmed?
Check table growth of not partitioned column table
->which parameter values has to be confirmed?

Regards
magalingam