9:57 a.m.
Hello,
I would like to improve the performance of my Drools process, I have already done some
enhancements like removing the use of "collect" and "eval".
I must say I'm a Drools newbie struggling to determine what causes my performance
problems.
Before asking, I need to explain in few words the problem I want to solve with Drools :
My company is a bank where traders are making deals on markets, these deals must be
classified in book, this is what we call "booking process".
Booking is done according to booking criteria : which trader has made the deal ? on which
product ? etc ...
A booking rule defines a set of criteria and the target book where the deal will
classified.
I'm using Drools to :
1. find all booking rules matching deals made by traders
2. apply the right booking rule on the deal among the ones matching the deal (i.e. that
is book the deal)
I'm testing the booking process with 1000 deals and 229 booking rule.
It takes 60 seconds for Drools to book the 1000 deals, which is too slow to be put in
production.
On the 60 seconds, I have 7 seconds for facts insertion and the remaining for process
(after session.fireAllRules)
Do you think such numbers are normal/expected ?
Like I said I don't really know where the performance bottlenecks are ... I'm
thinking of exploring the following possibilities :
* splitting my rules into very simple rules
* starting the booking process with fewer data and running it several times (instead of
one booking process on 1000, run 10 booking processes on 100 deals each)
I have put my rules code below (for courageous people), if you see some obvious
performance problems or if you can give some hint to explore, you would be very welcome.
Thanks in advance for your lights,
Regards,
Joël Costigliola
Ps : rules details
I have defined a flow composed of 3 steps/rules group, each group has one rule, here's
the flow and the rules.
Flow :
------
"Find matching booking rules" -> "Refresh" -> "Apply
booking rule group"
Rules :
------
The job of this rule is to store in DealMatchingBookingRules all the booking rule matching
a specific deal (each DealMatchingBookingRules instance has a unique Deal).
rule "Find matching level 1 booking rules by deal"
salience 10
no-loop
ruleflow-group "Find level 1 matching booking rules by deal group"
when
$dealMatchingBookingRules : DealMatchingBookingRules($dealModel : deal,
$dealProductRelatedIndexes : dealProductRelatedIndexes)
$bookingRule : BTExecutionBookingRuleModel (
priority == 1
// when a criterion is not set, it is considered as satisfied.
&& (traderCriterion == null || $dealModel.trader == traderCriterion)
&& (portfolioCriterion == null || $dealModel.portfolio ==
portfolioCriterion)
// when a product type criterion is set to unknown, it is considered as satisfied
whatever deal product type is.
&& (productTypeStringCriterion == null || productTypeCriterion ==
ProductType.Unknown
|| $dealModel.product.productType == productTypeCriterion)
&& (listedIndexCriterion == null ||
$dealProductRelatedIndexes.relatedIndexes contains listedIndexCriterion)
)
then
Logger log = LoggerFactory.getLogger("Matching booking rules LOGGER");
log.info("Found a level 1 matching rule for deal : " + $dealModel +
", rule is " + $bookingRule);
$dealMatchingBookingRules.addMatchingBookingRule($bookingRule);
end
// used to tell Drools that our $dealMatchingBookingRules are ready for next step in flow
rule "Refresh facts in level 1 booking rule process"
salience 5
no-loop
ruleflow-group "Refresh facts in level 1 booking rule process group"
when
$dealMatchingBookingRules : DealMatchingBookingRules()
then
update($dealMatchingBookingRules);
end
rule "Apply level 1 booking rule"
no-loop
ruleflow-group "Apply level 1 booking rule group"
when
$dealMatchingBookingRules :
DealMatchingBookingRules(hasSingleMatchingLevel1BookingRule == true)
then
BTExecutionBookingRuleModel effectiveBookingRuleModel =
$dealMatchingBookingRules.getSingleMatchingLevel1BookingRule();
effectiveBookingRuleModel.applyRuleOnDeal($dealMatchingBookingRules.getDeal());
retract($dealMatchingBookingRules);
end
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