#cpu-usage

Fixed: How are CPU time and CPU usage the same? #dev #programming #computers

How are CPU time and CPU usage the same?

In the Wikipedia page for CPU time, it says

The CPU time is measured in clock ticks or seconds. Often, it is useful to measure CPU time as a percentage of the CPU’s capacity, which is called the CPU usage.

I don’t understand how a time duration can be replaced by a percentage. When I look at top, doesn’t %CPU tell me that MATLABis using 2.17 of my cores?

How-to: SQL Server suddenly using only a small portion of CPU #computers #dev #it

SQL Server suddenly using only a small portion of CPU

We’ve got a Windows 2008 R2 server running SQL Server 2008. All of a sudden, the SQLServer process is refusing to go above 20% CPU usage. As of last week, when running a heavy query against the db it would rise to 100% usage as I would expect. We’ve had this server for a while and it seems strange that it would just suddenly have this limit.…

Answer: "Peaky" CPU Usage on Domain Controllers #dev #development #programming

"Peaky" CPU Usage on Domain Controllers

We have two Windows Server 2008 SP2 (sadly not 2008 R2) Domain Controllers in a small 150 client domain that are exhibiting very “peaky” CPU usage. The Domain Controllers both exhibit the same behavior and are hosted on vSphere 5.5.0, 1331820. Every two or three seconds the CPU usage jumps up to 80-100% and then quickly drops, remains low for a second or…

Fix: Is there a Windows equivalent of Unix 'CPU steal time'? #solution #fix #it

Is there a Windows equivalent of Unix ‘CPU steal time’?

In order to assess performance monitoring accuracy on virtualization platforms, the CPU steal time has become an increasingly relevant metric – see EC2 monitoring: the case of stolen CPU for an instructive summary in the context of Amazon EC2 and IBM’s paper on CPU time accountingfor a more in-depth technical explanation (including…

Resolved: When is sustained 100% CPU utilization not a worry? #programming #development #solution

When is sustained 100% CPU utilization not a worry?

Please help refine a discussion going on in our shop.

Consider the following scenario. There is a Microsoft VPC running several apps and services (Windows 2003 server). The server has two or three critical roles. Every so often, CPU utilization goes to 100% on a sustained basis. One of the culprits in this is a legacy application, for which the…

Answer: Why is 1 of my 24 CPUs Pegged at 100%? #solution #computers #it

Why is 1 of my 24 CPUs Pegged at 100%?

I have an HP ProLiant DL380 G7 system using 2 6-core CPUs, with Hyper-threading enabled, for a total of 24 logical CPUs (as seen by Windows).

When running our application, total system CPU utilization is good, but one of the 24 CUPs is pegged at 100%:

Edit:This is the PerfMon data for the System process during this time, and for the Processor with the high…

Resolved: Why is my router CPU at 40% when no processes use more than 2%? #answer #computers #it

Why is my router CPU at 40% when no processes use more than 2%?

I have a problem, I have a Cisco 1841 running Cisco IOS 15, and I get strange behavior. The CPU usage is shown as 40%, but there is no processes that is using this much CPU power.

Here is an example:

lev1841#show processes cpu sorted CPU utilization for five seconds: 41%/39%; one minute: 42%; five minutes: 32% PID Runtime(ms)…

Fix: Task Manager shows 100% CPU utilization, but nothing in process list does #computers #dev #programming

Task Manager shows 100% CPU utilization, but nothing in process list does

I’m using WinXP, and I notice that in the Task Manager, on the Performance tab my CPU usage is 100%. But When I go to the Processes tab, and sort by CPU System Idle Process is taking up 90%. I’ve double checked that things like AVG anti-virus isn’t actively scanning, and that jkdefrag is not defragging. But I know something…