Hi, I am using DELL 2850 dual CPU system Xeon, 2 GB RAM,with RAID 5 for databse storage and RAID 1 for mirroring. I have exchange ent 2003 with sp1 on windows 2003 ent . I have around 4000 mailbox on this. most of the time Page file utilization will be 2034 Mb out of 4 GB most of the time RAM utilization will be 1.5 GB out of 2 GB RAM (500 MB free) Is it recommended to increase the RAM from 2GB to 3 GB or 4GB ?? Can you please advice. Regards Praveen R --------------------------------- Click here to donate to the Hurricane Katrina relief effort.