Re: [rules-users] Rule set execution performance and memory consumption issues
On 08/05/2013 06:29 AM, Wolfgang Laun wrote:
Guete Morge Joe,
:-) Guete Morge Wolfgang
from that other thread I can recall that you are using "from
<expression>", which (not knowing the rest) would be high up on my
suspect list.
That's one thing I already learnt :-) I'm not using any
"from" clauses
in my rule sets which are used against the "big" fact sets.
That other rule set from the other thread was used in a different
context, where the number of facts is much smaller (in the hundreds).
And, in order to learn more, some monitoring should be considered. The
number of activation creations and deletions (not by firing) can
indicate wasted work that might be avoided.
I tried to implement something like
that, but must admit that I don't
yet understand how I would do such a monitoring?! All I currently have
are custom AgendaEventListener and WorkingMemoryEventListener. I would
suspect that to implement such a monitoring, I would use
void activationCreated(ActivationCreatedEvent event);
void activationCancelled(ActivationCancelledEvent event);
of the AgendaEventListener. Could you point me to some documentation
that explains when exactly those events are triggered? Until now, I
haven't found too much doc on these aspects of Drools :-/
--
CU, Joe