I have (sort of) similar issue: 1 controller, 4 generators; now all running Loadrunner version 11.52, on Windows server 2008 R2 SP1 virtual machines. For 100-, 300-, 500- virtual user tests, which we traditionally have run on our customer-facing web site prior to releasing updates to production, we now constantly get "generator using over 80% CPU" errors every time scenarios run. This did not occur prior to upgrading from 11.0 to 11.52; or moving from Windows 2003 to Windows 2008 R2. Other than being VM's, all machines are well within HP recommended specs for memory, CPU, paging, etc. However, Windows PerfMon output bears out the error message, when executed on the generators during load tests: the generators constantly get pegged at 100% CPU for practically the whole execution of the scenario. We've even seen this "generator >80% CPU" error with as few as FIVE (5) virtual users; though certainly more prevalent with larger number of simultaneous users. We run virtual users as threads; this is to HTTP/HTML app, not a new app, never had this issue previously. See attachment for more info / screen captures. Any advice? That is, other than loading up generators with multiple and/or multi-core CPU's? <--Or, is that the only solution?? Anyone else seen this CPU issue on load generators, with either LR 11.52, or with VM generators on Windows server 2008 R2?
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