Comments on: LoadTesting takes a turn with Server Virtualization http://itsjustanotherlayer.com/2009/05/loadtesting-takes-a-turn-with-server-virtualization/ Virtualization is a layer in software. What are you abstracting away from? Sat, 17 Jul 2010 12:16:13 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: Anaxander http://itsjustanotherlayer.com/2009/05/loadtesting-takes-a-turn-with-server-virtualization/comment-page-1/#comment-1276 Anaxander Tue, 09 Jun 2009 16:30:39 +0000 http://itsjustanotherlayer.com/?p=149#comment-1276 When monitoring CPU usage, are you using the vCenter performance counters or running perfmon inside the Guest OS? I like the vCenter counters but the per-CPU usage stats are only real-time. What is your methodology for determining over-allocated memory? Memory size versus Guest Memory % used? When monitoring CPU usage, are you using the vCenter performance counters or running perfmon inside the Guest OS? I like the vCenter counters but the per-CPU usage stats are only real-time.

What is your methodology for determining over-allocated memory? Memory size versus Guest Memory % used?

]]> By: Vikash Kumar Roy http://itsjustanotherlayer.com/2009/05/loadtesting-takes-a-turn-with-server-virtualization/comment-page-1/#comment-1269 Vikash Kumar Roy Wed, 03 Jun 2009 13:31:25 +0000 http://itsjustanotherlayer.com/?p=149#comment-1269 Most of the satiation which I came across is when you run single threaded application run on vSMP and performance degrade. It becomes very hard to make customer understand that “Please reduce CPU and performance will improve”. Their general mind set is that if we add more CPU/RAM performance increases. I usually play the same mind game to convince business or application owner to reduce CPU. Usually I approach them with intention to prove that application is not multithreaded . For that if I have to approach even software vendor I do it. Most of the satiation which I came across is when you run single threaded application run on vSMP and performance degrade. It becomes very hard to make customer understand that “Please reduce CPU and performance will improve”. Their general mind set is that if we add more CPU/RAM performance increases. I usually play the same mind game to convince business or application owner to reduce CPU. Usually I approach them with intention to prove that application is not multithreaded . For that if I have to approach even software vendor I do it.

]]> By: iguy http://itsjustanotherlayer.com/2009/05/loadtesting-takes-a-turn-with-server-virtualization/comment-page-1/#comment-1265 iguy Mon, 01 Jun 2009 19:07:23 +0000 http://itsjustanotherlayer.com/?p=149#comment-1265 The main one is watching each individual CPU over time graph in the Guest OS and if it doesn't consistently stay "close", then you know that the applications on the box aren't threading or utilizing the extra CPUs effectively. An example would be two of the 4 CPUs go to 20% and one goes to 10% over a processing run. The last one goes to 35%. This system will likely run faster on a 2 CPU system instead of the current 4. The main one is watching each individual CPU over time graph in the Guest OS and if it doesn’t consistently stay “close”, then you know that the applications on the box aren’t threading or utilizing the extra CPUs effectively. An example would be two of the 4 CPUs go to 20% and one goes to 10% over a processing run. The last one goes to 35%. This system will likely run faster on a 2 CPU system instead of the current 4.

]]> By: Paras http://itsjustanotherlayer.com/2009/05/loadtesting-takes-a-turn-with-server-virtualization/comment-page-1/#comment-1263 Paras Thu, 28 May 2009 22:22:31 +0000 http://itsjustanotherlayer.com/?p=149#comment-1263 Interesting Stuff, would be interested in knowing, what metrics were used to determince... application isn't using the 4CPU as effeciently as 2CPU. Interesting Stuff, would be interested in knowing, what metrics were used to determince… application isn’t using the 4CPU as effeciently as 2CPU.

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