Hi Praveen,
i have a better idea! Start Transaction DB13 and select the Full Screen Mode.
(see Image)
Here you can analyze the most importnat things such as Memory, Performance, Errors, etc.
By the way here you can also read the ALERT.log without going to the database Server.
Before you can use the ST05 you have to turn on the trace but i think you want to analyze the past, right?
I hope THIS will help you.
Sorry for my bad english, i'm from Germany 
Regards
Philipp