DSXchange

I can see the below one in all the job log.

main_program: orchgeneral: loaded
orchsort: loaded
orchstats: loaded

what are they ? what they will do? why are they used in all the jobs?

They're modules that do stuff that that particular job needs. Or may need.

can you tell me what kind of stuff those modules wil do? where i can find more information about those ?

No. This information is not documented in the public domain. They are modules of the Orchestrate engine. For example, if you needed to connect to Oracle, you would probably see a module called orchorcl loaded.