Sirs
As per First suggestion I have done and now sem5.log is 2 .06 Mb.
As per 2nd suggestion my SEPM has all the options ticked as desired.
Thank you Sirs.
But still I have some queries.My sem5.db is 2.43GB. Inetpub folder is 4.90GB out of which client package folder is 0.97GB and Content folder is 3..70GB.Only one Backup is configured to store and it is around 2GB.
All these files are in normal size or needs fine tuning?Please reply.