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Questions tagged [metrics]

metrics are a way to measure things.

Metrics are a way to measure things.

For instance, in networks, it is used to identify the cost of an operation. If you have a packet that needs to go from router A to router B, it can get there by either going through router D or router C. Router A will calculate the cost, this is based on metrics. A router can calculate a metric by looking at what routing protocol is used by another router and its bandwidth. It will try to always use the router with the lowest metric.

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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…
Steffen Opel
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What is the difference between OpenTSDB and Graphite?

As far as I can tell, here are the main differences: OpenTSDB does not deteriorate data over time, unlike Graphite where the size of the database is pre-determined. OpenTSDB can store metrics per second, as opposed to Graphite which has minute…
vedang
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Routing selection: specificity vs metric

I understand that Linux chooses the most specific route to the destination when it does routing selection. But what about a route's metric? Does it have a higher priority than route's specificity? A reference to the details of the routing selection…
Eugene Yarmash
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When to move a virtualized server to physical?

Virtualization has some great benefits, but there are times when a virtualized server needs more performance and should be moved to physical. My question is, how do you tell when these times are? I'm looking for measurable data and metrics that show…
Alex Angas
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How can I monitor VM memory usage on Azure?

I have a few VMs set up as ADO (VSTS) build servers and thought I'd look into CPU and RAM usage over time to optimize the VM size. However I have had a hard time finding anything in Azure that allows me to investigate memory usage in VMs. The VMs do…
Pelle
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Looking for a recommendation on measuring a high availability app that is using a CDN

I work for a Fortune 500 company that struggles with accurately measuring performance and availability for high availability applications (i.e., apps that are up 99.5% with 5 seconds page to page navigation). We factor in both scheduled and…
Tim Reddy
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Tracking Apache by VirtualHost

I have an apache webserver running many VirtualHosts. Recently it has been bogging down and becoming unresponsive, and I'm wondering how I can determine which VirtualHosts are causing most of the issue. We have had occasions in the past where a bug…
Brent
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Graphite stops collecting data randomly

We have a Graphite server to collect data through collectd, statsd, JMXTrans ... Since a few days, we frequently have holes in our data. Digging through the data we still have, we can see an increase in the carbon cache size (from 50K to 4M). We…
Guillaume
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I need to replace munin with something more scalable

I have used munin on multiple servers for many years with great success, however with more than 100 munin-nodes and when there is load on the clients, the processing is timing out. I have made some scaling changes to the cron job, and number of…
Tom
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How to compare CPUs?

What are the metrics and their priorities to compare task specific performance of various CPUs?
Jeff
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Reading Docker metrics in machine readable format

I'm running some Docker containers for my users. Users are able to start and stop their containers dynamically, so I would like to watch my Data space available metrics from docker info with some sort of monitoring system. I've tried to use Docker…
Věroš K.
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How to change Interface Metric permanently in CentOS

My Config: Guest OS - CentOS7 Host OS - Windows 7 Interface - 3 (enp0s3, enp0s8, enp0s9) Installed in Virtual Box enp0s8 is Bridge to wlan0(For Internet) enp0s3 and enp0s9 are host-only Kernel IP routing table Destination Gateway …
Veerendra K
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How to display a graphite graph of used memory when you have total memory and free memory

My servers send mem_total and mem_free metrics to Graphite, but I'd like to display mem_used on my dashboard. I'm currently solving the problem by doing: offset(scale(servers.foo.*.mem_free,-1),30823052) where 30823052k is the total memory. I'm…
phrend
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Monitor and collect statistics on TCP connection to src or dst host

I would like to collect stats on TCP/UDP packets sent between two hosts (A and B). I am looking for a tool to install on A and B to get the following information: kb/seconds packets/seconds (cumulative) bytes sent so far (cumulative) packets sent…
Skarab
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How to define appropriate measurements for a Service Level Agreement?

I work for a small development house who are increasingly being asked to put together formal SLAs for our products based on particular configurations. From a development side of things I'm comfortable with this, however there's no point in my saying…
Jon Hopkins
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