I am new to Jrockit mission control so please bear with me. I have 3 servers which are load balanced and are running JRockit. Can I use a single Management console to monitor all these servers and collate the information?.
You can use a single JRockit Mission Control instance to connect to several servers at once. Each server will show up under it's own tab.
Documentation for JRockit Mission Control can be found here: http://download.oracle.com/docs/cd/E15289_01/index.htm
Related
I have scheduled Java Agents. I would like to use a profiler to monitor the JVM to see how the server is performing.
When developing and testing, I run the agent from my Domino Designer from my workstation.
The workstation and server have a Java JRE installed.
Domino and Notes appears to have its own JVM directory.
Tools like VisualVM seem to connect to the computers JVM, how would I use something like VisualVM to monitor the JVM used to run xpages and agents?
Based on this QA and my attempts many years ago I think you can't do it your way.
Edited to reflect comments...
Anyway, I was able to profile XPages indirectly via heap monitoring or NSD dumps (that's the extreme - for freezing code).
For XPages, take a look at this project XPages Toolbox. For Java Agent, try native agent profiler:
http://searchdomino.techtarget.com/tutorial/How-the-Agent-Profiler-tool-improves-Notes-Domino-performance
http://www.ibm.com/support/knowledgecenter/SSVRGU_9.0.0/com.ibm.designer.domino.main.doc/H_PROFILING_AGENTS_AND_WEB_SERVICES_STEPS.html
In worst case, try to debug your agent to get a picture of collections it iterates or paths it goes in the code execution. Just be aware - remote debugger tends to attach to one of two JVMs - agent manager's or http's task. Be sure it attaches to the right one.
I Have 70 VM machine ( Windows, RHEL, Solaris).
Can anyone suggest me any tool that can help me monitor all of them at ta single UI.
Details I can provide:
IP of the VM.
Login Details.
Details that should be provided by the VM Monitoring tool.
Instance is up or no
Number of Disk Drives.
Spaces available in each drive.
Any other details will also be helpful.
You can try ITRS Geneos. It has lots of plug-ins available and work for both Windows/Unix systems. Also can be customized as per requirement.
Zabbix does a great job, and is open source
You can try numerous open source monitoring tools like nagios, zabbix, cacti, Icinga . Zabbix is quite good as it is new in the market.
I would like to attach to a WebSphere JVM and obtain useful data like garbage collectors' names and their collection counts, thread counts, heap/non-heap memory usage, JVM uptime etc. However, this link gives the list of MBeans available with the WebSphere JVM -
http://pic.dhe.ibm.com/infocenter/wasinfo/v6r1/index.jsp?topic=%2Fcom.ibm.websphere.javadoc.wsfep.doc%2Fweb%2FmbeanDocs%2Findex.html
These MBeans don't seem to offer any data that I require. Is there any other way to obtain the data? I shall be using JMX to gather it.
If you're a corporate with bucks to spend I would suggest a product like Wily Introscope which runs an agent along with your JVM to collect all the metrics that you are after. I have used it with Websphere servers. Searching for an Open Source alternative I came across GlassBox which may provide a low cost alternative for you.
I'm not aware of any default MBeans that will provide the coverage you're after. It's typically the big Java vendors that provide this type of functionality.
[Update]
Having done something recently using VisualVM with Websphere 7, for the purposes of real-time monitoring/troubleshooting, I thought I would share my knowledge. VisualVM comes with the standard Sun JDK and you will find it installed here: JAVA_HOME\bin\jvisualvm.exe
To enable the JRE in Websphere to allow VisualVM to connect you must add the following JVM parameters using the Websphere Admin Console
Go To: Application Servers > [server_name] > Java and Process Management > Process definition > Java Virtual Machine > Generic JVM arguments
-Djavax.management.builder.initial=
-Dcom.sun.management.jmxremote
-Dcom.sun.management.jmxremote.authenticate=false
-Dcom.sun.management.jmxremote.ssl=false
-Dcom.sun.management.jmxremote.port=1099
-Dcom.sun.management.jmxremote.local.only=false
Make sure that the port number you have chosen above is not already in use
netstat -ap | grep 1099
Restart the server and you will be able to connect using VisualVM to see Uptime, Threads, Heap and GC profiles.
I see that Sun have also documented how you can write your own Java JMX client to read these values.
You could go with the suggestions provided by Brad and Andreas.
I would like to give you some insights into some of the tools that should be explored
(1) Tivoli Performance Viewer. This should provide some information about the JVM.
(2) IBM Health Center -> http://www.ibm.com/developerworks/java/jdk/tools/healthcenter/
Both of these should provide you a lot of info that you require.
Try them out
The JVM statistics are provided by the platform MXBeans. If you need to collect this data over a short period of time, then you could use a tool such as VisualVM. It's a bit tricky to configure this to connect to a WebSphere instance, but it is possible. One way to do that (there are other options) is described here:
http://code.google.com/p/xm4was/wiki/VisualVMHowTo
If you want to collect the data over a longer period of time, then you need a monitoring system. At work, I wrote a plugin for the Open Source RHQ enterprise management system that adds support for WebSphere. I'm in the process of releasing this plugin as an Open Source project, but at the time of writing, I have not yet published the documentation and there is also no downloadable release yet. Only the source code is available right now. I will try to complete that in the next weeks. If you are interested in this project, please let me know.
Many times, I get:
-Frozen, load goes to 5.0. Can't use my box.
-Just doesn't work.
Do following steps:
1.rabbitmq-plugins enable rabbitmq_management
2.service rabbitmq-server restart
3.browse to http://rabbitmq-server-ip:15672
4.login with
username: guest
password: guest
Dont forget to change your password later.
As sheki notes, rabbitmqctl is your first port of call for diagnostics, and for building monitoring on top of, but it's not suitable for actual monitoring directly being a manual command line.
I've found DataDog very good to monitor both the MQ details, plus the host platform in parallel. e.g. you can watch the queue levels and set alerts on queues backing-up, while also watching the CPU/memory/IO inflicted by these queue levels. It really helps to get ratios of resource usage, and the alerts are good. Having a uniform platform for both infrastructure and application level monitoring is surprisingly rare, but speeds up diagnoses of production issues hugely.
NewRelic is similar and also has a RabbitMQ plugin, although I've not used this plugin specifically, I've used NR for years and found it invaluable in diagnosing operational issues.
AppDynamics is another example. Similarly this allows you to drill down into your app from a high-level dashboard, and visually navigate from problems to causes. It's especially good with visualising the network of a distributed application across various services/servers. I've used this, for example, to find complex problems in .NET applications and SQL Server clusters using 3rd party Web Services (e.g. latency and its consequences to your app over chatty protocols). These things are very difficult to diagnose, especially for developers who are limited to checking their code. Diagnosing operational issues requires a much broader picture.
I gave up trying to even install and configure Nagios. I know it's the 'best' but it's the best of an old breed of self-configured beasts which we don't have time to manage. I didn't even get it going... and eventually turned to the more 'modern' cloud approach. Once you get over the trust factor, it's pretty liberating.
I'm using these APM platforms together* to aggregate data from:
Windows O/S level Event Logs/Services
Linux O/S level
AWS console level
RDS, EC2
Apache
MySQL
App integrations / custom NR plugins I've written
Rabbit MQ
*NewRelic can feed into Datadog! So if you are already using NR you don't need to install DD on those hosts as well.
Being able to view all these levels together gives you a view on the publishers, middleware, MQ servers, workers and front-end app - all in one dashboard.
I would highly recommend an approach like this, because just looking at one server alone leads you to a lot of head-scratching. Seeing an entire stack in one customisable dashboard is just so illuminating it takes most of the guesswork out of it.
Worried about installing these things? I found New Relic to be especially light-weight and unobtrusive. AppDynamics seemed to stress the host a bit more, but mostly that's because you had to run the visualisation tools on the host! (this may have changed). DataDog seems performant, but creates a lot of control panels/icons on the target host (perhaps just a visual impression).
To a four year old question - this answer probably wasn't available in 2011, but in 2015 these once 'startup' style APM services are just tens or hundred dollars a month for an unbelievably rich enterprise-level solution.
There are bunch of RabbitMQ monitoring plugins available for different monitoring systems like Nagios, Zabbix etc.
Look at http://www.rabbitmq.com/how.html#management
Using rabbitmqctl is the most straight forward solution to check the status of the node.
$ rabbitmqctl status
This should tell you the status of the RabbitMQ node.
If you have PRTG (or any probe system with a HTTP sensor check), you can check the server status described at the following page:
https://blog.cdemi.io/monitoring-rabbitmq-in-prtg/
In particular you have to
Enable Management Plugin
The rabbitmq-management plugin provides an HTTP-based API for management and monitoring of your RabbitMQ
server, along with a browser-based UI and a command line tool,
rabbitmqadmin. The management plugin is included in the RabbitMQ
distribution. To enable it, we need to run: rabbitmq-plugins enable
rabbitmq_management on the RabbitMQ nodes. For more details on the
Management plugin refer to RabbitMQ Documentation.
The web UI is located at: http://server-name:15672/ The HTTP API and
its documentation are both located at: http://server-name:15672/api/
Once done, you can check the overview of your server with the API:
http://server-name:15672/api/overview
Where you have a JSON with all details about the server, active connections, queues, etc.
This cmd will help you service rabbitmq-server status
OR try theseservice rabbitmq-server stop and service rabbitmq-server start then service rabbitmq-server status.
I want to get a heap dump (suspected memory leak) of a certain Java process. However, when I start the jvisualvm tool, I cannot see any of the running Java processes.
I have Google'd around about this and have already found a couple of articles saying that you have to run the Java processes using the same JDK that you start the jvisualvm tool with in order for it to be able to see them. However, as far as I can see, this is already the case. I'm doing everything locally (I have remote access to the machine).
A couple of things to consider:
The processes are running on a firewalled Windows 2008 server
The processes are running using renamed versions of the JDK java.exe executable
As far as I can see the processes are running using the 1.6.0_18 JDK
One of the running processes starts an RMI registry
I'm waiting on a virtualized copy of the server so I can mess around with it (this is a production server). But in the meanwhile; any ideas as to why I cannot see any of the processes in jvisualvm (or jconsole for that matter)?
Well after I did a little research, it would appear that Peter's comment was correct. Because the JVM processes were launched by another user (the NETWORK SERVICE account because they were being started by a Windows service) they didn't show up in jvisualvm.
Workaround
Since I have access to the application configuration, I have found the following workaround, which involves explicitly enabling unsecured JMX for the target JVM:
Add the following JVM parameters:
-Dcom.sun.management.jmxremote.port=3333 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false
Add the remote process to jvisualvm using JMX by click File -> Add JMX Connection. You can connect to the process using port 3333. Obviously you can change the port if you want.
Link to article explaining this in a little more detail: http://download.oracle.com/javase/6/docs/technotes/guides/visualvm/jmx_connections.html
Notes
It's probably not a good idea to keep the JVM settings permanently, as they would allow anyone to connect to the JVM via JMX.
You can also add authentication to the JMX JVM parameters if you want to.
The simplest way is to execute jvisualvm as administrator (win: "run as administrator"). Which is not ideal but works. All java processes are visible then.