I have a problem with my ISA server. From time to time it informs me that he have enough memory. Everything is OK after reloading. I tried to monitor the situation with my Performance monitor and received a first results. I saw that my system total working set peak is about 1037940 kb ( with 1046320 installed in my system). Also I saw that total counter of working set is about 7406777. Is it a reason of my problem and I need an addition memory? What is the difference between working set and working set peak ? I want to understand what is the reason of my problem. What kind of application did this ? Maybe I have a problem with my memory hardware. What can the list recommend in this situation ? Best Regards Andrey Silkin