dori wrote:
thanks for the reply. Does this also give you information about how many
errors users may have received, and posiible the time and load (at the time
of) of those errors?
Hi,
If you can identify that an error occurred, yes. For example, if an
Exception is thrown,
you would catch it at the top servlet, then update a counter value
accordingly. This value can then
be graphed. The Tomcat load would be the number of servlets currently
running, also a
graphable "gauge" etc.
But it's all manual work, nothing general. Plus, RRDtool has its nasty
quirks and I had to embed it into lots of
Perl to automate tasks. If you are interested, I can upload it, but it
does not exactly have the smoothness of
an RPM installation.
Still, the results can be nice:
http://public.m-plify.net/examples/RRDTOOL.png
I haven't looked at Lambda Probe though. As I am being pushed to JBoss
now, this might be a
good occasion.
Best regards,
-- David
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