Enhance the selection criteria of COOIS

Hi Experts,

My role is Basis, I have a problem with tcode COOIS. Users normally execute the COOIS and not enter the sensible selection criteria. It make very high system performance during run and use more than 70% of SAP paging after finished. Normally SAP performance is good enough, I cant imagine if user execute COOIS more than 1 session. They're also not accept to execute in background due to their existing operation design but only thing I can thinking now is make more restriction for the selection criteria.

Pls suggest me ur best practise that, How can I hide or lock the unneccessary selection criteria in COOIS? And set the default variant for everytime user run tcode COOIS or else that can enhance the COOIS.

Regards,

Piyapong C.