If you try and increase your maximum command history, you may run into some limitations:
PS C:\> $MaximumHistoryCount = 100000
The variable cannot be validated because the value 100000 is not a valid value for the Maximum HistoryCount variable.
There is no clue though what the legal ranges are. The interesting part here is just how the variable maintains a validity range. The answer is: the variable has a ValidateRange attribute that you can query:
$variable = Get-Variable MaximumHistoryCount $variable.Attributes $variable.Attributes.MinRange $variable.Attributes.MaxRange
Whenever you come across a variable that has a numeric limitation that is not implemented through the raw data type, you may want to look at the variable attributes to check whether there is a validator attribute in place.
