Just turn everything on, and you should see improved performance.
However I would recomend you move to 4.0 as soon as possible, we have
much better performance nad memory usage there.
Mark
Yuri wrote:
Mark Proctor <mproctor <at> codehaus.org> writes:
I assume you are on 3.0, as the properties system should be overhauled.
However left beta node indexings should be true, for both 3.0 and 4.0. I
can't remember if alpha node hashing is true or false in 3.0, but in 4.0
its false as default and then gets turned on when you try to do dynamic
rule additions. But in all honest you shouldn't be touching that stuff
unless you really know what you are doing. Turning of left beta node
indexing only improves performance for rules that are always activated
from the root (first) pattern.
Yes, I am using 3.0.6.
Here are the defaults from RuleBaseConfiguration.java:
RuleBaseConfiguration.PROPERTY_INDEX_LEFT_BETA_MEMORY = false
RuleBaseConfiguration.PROPERTY_INDEX_RIGHT_BETA_MEMORY = true
RuleBaseConfiguration.PROPERTY_HASH_OBJECT_TYPE_NODES = true
RuleBaseConfiguration.PROPERTY_HASH_ALPHA_NODES = false
For an application that has hundreds of thousands of facts in memory with few
rules would any of these settings improve the performance of joins?
thanks,
-- yuri
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