You can configure the threshold values for the performance counter Warning and Critical status indicators.
To configure the performance counter status thresholds
Select the Performance Counters tab on the Operations Manager Configuration page.
To change a displayed threshold value, overtype the current value with the required value. Values must be numeric and greater than zero. Critical values must exceed Warning values, except for Available Mbytes and % Free Space, where the Critical value must be less than the Warning value.
Repeat the previous step with the threshold values of other counters if required.