Timer Running or not running Detailed Information


I have Timer process could you please tel me some question answers

1.If  timer running so All Metadata information about timer  like when it was running  how any time it was taken to complete the activity. 

2. If  timer process was fail so what was the reason for fail , when was it fail

3. Timer database metadata information.

                                                                please provide me solution regarding that

In Service Center under monitoring there is a timer log