[gatein-dev] Fix in portal list

[Julien Viet]

On Nov 16, 2009, at 2:50 PM, Prabhat Jha wrote:

> Are these stats on by default?

yes

> What is the overhead of getting these metrics?

The collecting of data does not take much overheard, I have never  
spotted them in my JProfiler so far.

The processing of collected data must not be free, but I would not  
expect to have a sampling with a one second period to introduce much  
bias.

> BTW: It's awesome data to have.

thanks :-)

>
> ----- Original Message -----
> From: "Julien Viet" <julien at julienviet.com>
> To: gatein-dev at lists.jboss.org
> Cc: "Wesley Hales" <whales at redhat.com>, "Marek Posolda" <mposolda at redhat.com 
> >
> Sent: Monday, November 16, 2009 4:28:20 AM GMT -06:00 US/Canada  
> Central
> Subject: [gatein-dev] Fix in portal list
>
> I want to bring to you that useful following statistic available via
> JMX, specially in JBoss where you can use the JMX console.
>
> Wesley has been using it for his bridge demo (and I fixed the bug that
> was present Wes :-) ).
>
> I believe also that Marek could collect information during load
> testing and create graphs that would be correlated with the
> performances graphs. (for instance , showing the portal throughput and
> the average response time on the same graph, or showing the usage of
> the various caches correlated with the througput, I guess you get the
> idea).
>
> With the JMX console, the statistics are interesting but it remains
> limited, it becomes very useful only if we can exploit the data via a
> more powerful tool with charting and gauges.
>
> 1/ service=statistic,type=portal,view=portal
>
> - gives you the list of portal ids
> - for a given portal id you can get info like:
> 1/ average execution time
> 2/ minimum execution time
> 3/ maximum execution time
> 4/ execution count (can be graphed)
> 5/ throughput, i.e number of request per second (can be graphed)
>
> 2/ service=statistic,type=template,view=portal
>
> - list of the 10 slowest templates
> - list of the 10 fastest templates
> - list of the 10 most used templates
> - list of all template ids
> - for each template it is possible to have info about:
> 1/ average time
> 2/ min time
> 3/ max time
> 4/ execution count
>
> 3/ service=SessionRegistry
>
> it gives the list of the number of active JCR session in the portal
> which can be graphed as it gives a good indicator of the load on the
> server
>
> 4/ each cache is registered under the key
> name="$CACHE_ID",service=cache which gives the usual information
>
> there are other few mbeans available but they are less interesting, so
> I won't talk much about it.
>
> cheers
>
> Julien
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