If I get a dumpheap using JConsole, will that contain jmx counters also ?
Looking at the dump, I did not find it. So, the answer is no. I'm exploring other ways to get a jmx dump.
Related
We need to monitor the Neo4j hosted in GCP VM's instance for which we are using Prometheus. Neo4j Natively supports sending metrics to Prometheus.
Now we need to create a dashboard using the stack driver monitoring with the exposed prometheus metrics.
Any suggestions/help will be useful.
Thanks in advance !!
Well, I tried to find something elaborated about this particular scenario but all I found was related with GKE and prometheus as a sidecar. However, the configuration must be similar and probably you will find this documentation useful. This guide will also lead you to this official documentation.
Also found another user of neo4j trying to do something similar and there is an answer that maybe you should check. For logging neo4j to Stackdriver Logging, see this.
I have a Dropwizard application I am working with where I need to be able to monitor for active HTTP connections. I know Metrics provides classes for Instrumenting Jetty, and of interest to me is measuring total number of active connections....however the javadoc doesn't help me much, and I can't find any examples of how this specific functionality is implemented. Does anyone have any examples they can share?
I'm not sure what your exact use-case is but if you just need to be able to see active connections I think the simplest solutions are just using monitoring solutions like JMX, Datadog, New Relic, or Appdynamics. If you need it in the code I think you'd need to manually implement something. I'd recommend StatsD or Redis is that's the path you go down.
I'm trying to monitor my network usage with Graphite but I can't figure out how to do this, could you help me please?
In addition to this, I would like to monitor some other services, as nginx, mysql, etc,..
Thanks for your help!
Best.
Ofcourse there are multiple solutions possible. The solution I'm using is collectd. With collectd you can collect statistic data from plugins in rrd files. It has a lot of plugins like network, nginx and mysql.
It does not generate graphs by itself, but there are multiple ways to generate graphs. One of them is to send the collected data to graphite with the graphite plugin.
I am using grinder in order to generate reports for the performance tests for my application. But I noticed that it does not generate any report on CPU and memory usage. On further investigation, I found that Grinder does not provide this information. Now, my question is, is there any tool that can be hooked up with grinder, to record the CPU and memory usage details?
As you have discovered, this is not supported directly in The Grinder itself. You will need to use a collection of tools to accomplish this.
I use a combination of Quickstatd, Graphite, and Grinder to Graphite to get all my results in the same place where I can see them. If you need to support Windows, you can probably use collectd (with ssc-serv and the Graphite plugin) instead of Quickstatd, which is based on bash scripts.
You can also pull in server side metrics (like DB lookups per second, etc.) with tools like jmxtrans, statsd, and metrics.
Having all that information in the same place is really powerful, and can give you some good insights.
If you grind a Java server, you can get data via JMX from OperatingSystemMXBean and MemoryMXBean.
Then add the data to a Grinder user Statistic and the data will end up in the -data.log
grinder.statistics.registerDataLogExpression("Load", "userDouble0")
..
grinder.statistics.forCurrentTest.setDouble("userDouble0", systemLoadAverage)
the -data.log can directly be fed into Gnuplot
gnuplot> plot 'client-0-data.log' using 2:7 title "System Load"
I have a Java app running on Tomcat, and I would like to monitor counters using Windows Performance Monitor. Is this possible using a JMX adapter for the Java MBeans or by some other means?
The following tutorial might be of use:
http://www.developer.com/java/ent/article.php/3087741/Hooking-to-PerfMon-from-Java.htm
It shows how a Java application defines a custom counter that can be monitored in Perfmon. It basically boils down to using an extension DLL to the performance monitor and communicating with that via a memory mapped file. You could then hook your JMX counters into a similar mechanism so that they can be monitored from Perfmon.
Since you tagged this with JMX and MBeans, I assume your counters are accessible from a Java MBean. If so you could use jconsole, provided with the Java SDK, to monitor the counters. Once you find your MBean in the MBeans tab, double click on the value and it will draw a nice line graph for easy monitoring.
See JConsole Guide for more info.
This seems to be exactly what you're looking for, but it's not free:
http://www.adventnet.com/products/snmpadaptor/faqs/general.html
If you want to do this programatically, you can create a JMXConnection to the machine, then accessing the MBeans from there. We did this ourselves for a function test that involved keeping track of the number of threads in the application, which there's a counter for that you can access through JMX. If you want nice graphs and things like that I suggest using JConsole, as mentioned above. There's also a program called JProfiler that works like JConsole on steroids, basically. There's a free trial so you can try it out.
This article outlines how to access Windows PerfMon stats from Java and expose them as MBean attributes through JMX.