Re: Parfait agent, docs, rpm updates

Hi Marko,

----- Original Message -----
> >> [...]
> >> How is Parfait/JMX different in this regard?
> >> [...] Also, what happens if there is a crisis and I determine I need to
> >> see the updated values every one second instead?
> > 
> 
> I don't see it, care to explain? The man page version I have says:
> 
>        -i/--interval
>             Delay between sampling (JMX values in particular) to
>             refresh the values exported to PCP.

Oh, sorry, that was all too vague.  And it was the more detailed usage
message (parfait --help) that I was thinking of too:

  -i/--interval N
     Use numeric interval as the delta upon which JMX values will
     be reevaluated for exporting as memory mapped values (1 sec,
     by default).  Overrides the ${parfait.interval} Java system
     property.  Specified in milliseconds.

So, in your specific example, we'd be sampling via PCP tools at regular
much-longer frequencies (e.g. once a minute) and can increase that (up to
the once a second you mentioned) for that finer-grained accuracy you were
after, with no changes to parfait[-agent] at all.

> [...]
> don't use some of the most ubiquitous components in the middleware market?

https://plumbr.eu/uncategorized/most-popular-java-ee-servers-2016-edition
But, yes, I'd love to see real Parfait use on JBoss/WildFly, no question.

> [...]
> Going back to more concrete level, what are the short/long term plans
> for improvements around this area,

The plans are as we discussed earlier in terms of features you and I have
talked about - I still completely agree those are things we need to see,
to flesh out the available functionality here.

There's no firm dates for those, noone is signed up to implement them as
yet and resources here are scarce for this - I'm working on other things
in the short-medium term.  If noone else is available, longer term I'll
circle back to it.

Oh, that said, we will do some of the smaller items in the short-term -
like an example of injecting parfait-agent metrics from outside, docs and
more packaging work - but bigger things will need assistance from others,
or a longer wait.

cheers.

--
Nathan

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