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From "Vadim Gritsenko" <vgritse...@yahoo.com>
Subject How To Get Avalon Status, Was: StatusGenerator
Date Fri, 27 Jul 2001 03:26:03 GMT
To Avalon/Excalibur gurus,

Is it possible to get Avalon status like pool size/active count/etc?
If yes, how?

Vadim

> -----Original Message-----
> From: Jason Foster [mailto:jafoster@uwaterloo.ca]
> Sent: Monday, July 23, 2001 10:28 PM
> To: cocoon-dev@xml.apache.org
> Subject: StatusGenerator
> 
> 
> I've been running an internal C2 application for a while and have noticed
> what I think are some suspicious database behaviours.  Unfortunately I am
> not able to keep close track of the system to watch as the various pools get
> used and abused.
> 
> What I'm wondering is whether it would be possible to add some new items to
> the output of the StatusGenerator?  Off the top of my head it would be nice
> to know things like:
> 
>   - number of times a database pool has reached the hard maximum
>   - average number of idle/active elements in the pool
>   - how long an item tends to be out of the pool
>   - the state of the pool
>   - min/max/avg/stdev response times (maybe on a per-pipeline basis?)
>   - min/max/avg/stdev requests over a sliding time window
>   - state of the Memory and File stores
>   - the number/rate of info/warn/error/debug statements in the log
> 
> Anyone who has a thing for dynamically creating SVG graphics might want to
> make graphs out of this information :)
> 
> From my quick look at the Excalibur pooling APIs they don't store any of
> these metrics, which would make this a bigger change than simply modifying
> StatusGenerator.java
> 
> I remember some discussion of what I interpreted to be a profiling sitemap.
> This is clearly related to this proposal, but would be only one of the
> things the status generator could take a look at.
> 
> Any thoughts?
> 
> Jason Foster
> 
> 
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