How to trace a Long ruuning Job ?

Hi All,

Could you please let mw know , how to trace \ to take the ABAP runtime analysis for a long running job . For example a job in running for 5 hours in QA system.

then how can i trace the same. Which t-Code and how ? tracing eith ST05 and SE30 wouldn't be feasible as for as i know.

Regards,

SEN