8:26 p.m.
I am trying to improve performance on a Large DataSet, few Rules app
and came accross these two properties, which by default is false:
RuleBaseConfiguration.PROPERTY_INDEX_LEFT_BETA_MEMORY
RuleBaseConfiguration.PROPERTY_HASH_ALPHA_NODES
What do they mean actually? How and when should I use them?
I am trying to chase a O(n^2) performance problem that I understand it
is probably caused by the way I coded the rules, but it seems that I
need to deepen my understanding to actually find the hotspots. Are
there any techniques (that I probably dont know) that can help me find
what rule(s) is causing the issue?
As always thanks for previous answers
- Yuri
12:11 a.m.
New subject: Fwd: Performance Tuning
second try...
---------- Forwarded message ----------
From: Yuri de Wit <ydewit(a)gmail.com>
Date: Aug 3, 2007 9:26 PM
Subject: Performance Tuning
To: Rules Users List <rules-users(a)lists.jboss.org>
I am trying to improve performance on a Large DataSet, few Rules app
and came accross these two properties, which by default is false:
RuleBaseConfiguration.PROPERTY_INDEX_LEFT_BETA_MEMORY
RuleBaseConfiguration.PROPERTY_HASH_ALPHA_NODES
What do they mean actually? How and when should I use them?
I am trying to chase a O(n^2) performance problem that I understand it
is probably caused by the way I coded the rules, but it seems that I
need to deepen my understanding to actually find the hotspots. Are
there any techniques (that I probably dont know) that can help me find
what rule(s) is causing the issue?
As always thanks for previous answers
- Yuri
6:28 p.m.
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.
Mark
Yuri de Wit wrote:
I am trying to improve performance on a Large DataSet, few Rules app
and came accross these two properties, which by default is false:
RuleBaseConfiguration.PROPERTY_INDEX_LEFT_BETA_MEMORY
RuleBaseConfiguration.PROPERTY_HASH_ALPHA_NODES
What do they mean actually? How and when should I use them?
I am trying to chase a O(n^2) performance problem that I understand it
is probably caused by the way I coded the rules, but it seems that I
need to deepen my understanding to actually find the hotspots. Are
there any techniques (that I probably dont know) that can help me find
what rule(s) is causing the issue?
As always thanks for previous answers
- Yuri
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
12:21 p.m.
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
3:02 p.m.
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
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
10:37 a.m.
I turned them on and the INDEX_LEFT_BETA_MEMORY = true gave me some
problems: at least one rule stop firing in my test suite.
So I turned it off for now and the only thing I changed to true is:
RuleBaseConfiguration.PROPERTY_INDEX_RIGHT_BETA_MEMORY = true
RuleBaseConfiguration.PROPERTY_HASH_ALPHA_NODES = false
This seems to work.
On 8/7/07, Mark Proctor <mproctor(a)codehaus.org> wrote:
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
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
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