I am running Windows NT 4.0 EE SP6 with SQL 7.0 SP3 -- dedicated(Clustered Active/Passive). It has dual PIII 550 Mhz Xeon processor and 4 GB RAM (/3GT). It is running and ERP system with 60 users with about 20GB of database. I was monitoring the Physical Memory (K) everyday in the "Windows NT Task Manager" when I noticed that in less than two days, the "Available Memory" drops from 4GB down to 750MB. I've also noticed that the memory never rises even if users have logged off for several hours. As I checked the "Processes Tab", I noticed that the sqlservr.exe is using an average of 2.88GB of memory. Is this normal? Any suggestion? Thank you in advance.