How to change the threshold value

Hi Gopi,
If I understand correctly, you would like to adjust the thresholds for alarms.
The Foglight Registry has all these variables. We recommend that if you change anything, you make a note within the variable as to what the default value was, time, reason, etc.
In the Dashboards:
Administration | Rules & Notifications | Manage Registry Variables
Additionally, you can modify rules. If you want to modify the rules, please COPY the rule, and disable the original rule. Make changes to the copied rule.
In the Dashboards:
Administration | Rules & Notifications | Manage Rules
The vFoglight documentation is available if you login to the Vizioncore site, choose the Downloads tab, and then choose the Content subtab.
If you have a more specific question, please just post it.
Thanks,
-dave