0
votes
1answer
148 views

EC2, huge difference between top/sysstat and CloudWatch (cpulimit involved)

Yes, I read that it is normal, but in my case disparity is huge and I can't explain it, just look: I ran sar command for a while (last lines): 04:53:01 PM all 0.40 0.00 3.41 ...
0
votes
2answers
383 views

Amazon EC2 - how to determine how busy each CPU is

I have an Amazon EC2 micro instance. I believe that this is 1 core (or 2 for periodic bursts) with 4 CPU's. I'm getting confused with the terminology (ECU vs CPU vs Core) but really I would like to ...
1
vote
1answer
459 views

Why is SQL maxing out at 50% of CPU on my EC2 c1.medium instance?

I'm new to AWS, so I think this might be a really simple question: I'm using an EC2 t1.micro instance as my SQL DB server for some small-scale analysis that I'm doing (Windows, SQL Express 2008). It ...
2
votes
1answer
234 views

My sql consuming as much as 60% cpu time on start

I'm running a Wordpress installation on an Amazon Ec2 micro instance(linux ami). Using the default configuration Apache kept using up all the memory and shutting down mysql rendering wordpress ...
1
vote
1answer
183 views

How to check gpu usages on aws ec2 gpu instance?

I'm running a ubuntu gpu instance on AWS ec2. I'm not sure if my application is using gpu accelerations. So how to check gpu usages on aws gpu instance?
18
votes
2answers
2k views

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 ...
3
votes
1answer
1k views

Amazon EC2: how to find out detailed CPU usage?

I am running several EC2 instances, and I want to know the exact work my CPU is doing. On "normal" machines I am doing this with munin and its CPU plugin which looks at the statistics provided by ...
0
votes
2answers
219 views

How many cpus needed to check a 100 million digit prime number efficiently?

If I had access to potentially large number of CPUs and wanted to quickly check 100 million digit numbers for primality using a map-reduce architecture, how many CPUs would be necessary? Each of the ...
11
votes
3answers
6k views

What does %st mean in top?

Here is an example from my top: Cpu(s): 6.0%us, 3.0%sy, 0.0%ni, 78.7%id, 0.0%wa, 0.0%hi, 0.3%si, 12.0%st I am trying to figure out the significance of the %st field. I read that it means ...
2
votes
2answers
1k views

What should I look for when monitoring an Amazon EC2 Micro Instance's CPU usage?

I'm using Monit to keep an eye on my Amazon EC2 Micro instances, but I'm a little confused about the Load Average CPU metrics because of the Micro instances' ability to use up to 2ECU for short times. ...
0
votes
2answers
1k views

Low Cpu Usage in MySQL

I have one dedicated server on Amazon EC2, running mysql5 in a custom ami based on alestic debian lenny, in a small instance. Small Instance (default)* 1.7 GB memory 1 EC2 Compute Unit (1 virtual ...