in Application logs i have found error and same time got database down mail..
The description for Event ID 13 from source SescLU cannot be found. Either the component that raises this event is not installed on your local computer or the installation is corrupted. You can install or repair the component on the local computer.
If the event originated on another computer, the display information had to be saved with the event.
The following information was included with the event:
LiveUpdate returned a non-critical error. Available content updates may have failed to install.
the message resource is present but the message is not found in the string/message table