When running a large load tests on a machine in which system resources are inadequate you may encounter one of these errors. It is possible to tune your system to accommodate more virtual users as follows: You should check the number of "Memory/Free System Page Table Entries" on the machine by using either Performance Monitor or Performance Explorer. You should need at least 50000 free entries for a 3000 user test, although 100000 is an ideal value. Many high specification machines (i.e 1GHz Processor , 1GB RAM) have a default configuration which does not fit the requirements for simulating many virtual users. As a result there are some registry settings that can be changed to help tune the machine to run such high loads. 1.Disable the LargeSystemCache setting: Open the registry editor and browse to: HKEY_LOCAL_MACHINE/System/CurrentControlSet/Control/SessionManager/Memory Management/Large System Cache Set this value to 0. Now try running the test again. If you still experience any or all of these errors then try the following: 2.Set the SystemPages setting to the maximum value: Open the registry editor and browse to: HKEY_LOCAL_MACHINE/System/CurrentControlSet/Control/SessionManager/Memory Management/SystemPages Set the value to 0xFFFFFFFF Update: with the advent of Silk Performer v6.5.1, the System Configuration Manager is now able to make these changes for you automatically. To do this, open the System Configuration Manager tool, then click on the System Tuning tab. Old KB# 18827
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