Use the Test Server Administration window... to view the CPUs/Buffers Tab displayed on the test server.
To view the CPUs/Buffers Pane:
Select the CPUs/Buffers tab and view the test server buffer usage in the CPU status report - Last Reported CPU % and Last Reported Buffers Used %. Percentage of buffers used is reported as a number from 0 to 100 (rounded down). 0 means no significant usage, 100 meaning all buffers are in use.
If Buffer usages goes > 85% or > 95% there will be Run Log warnings in Test Sessions that are running on the respective TS-Processes. These will be similar to the same Run Log warnings you get for CPU %. Additional details in About Test Logs.
Examples of a vTS with one TS-Process:
For a real TS with multiple processes and special threading: