[rules-users] Does Drools Fusion consume a lot of memory?

[Wolfgang Laun]

Since you have everything in place: Could you please run the heap
memory test again, but now with a completely empty set of rules?

Also, please report the respective numbers of accounts, transactions
and other types (if any).

Have all the Accounts been inserted before you insert the events?

I see several potential causes for the considerable increase in heap
memory, but this might require experimenting; so I'd like to have the
answers to the preceding questions first.

-W

On 28/06/2012, chrisLi <shengtao0077 at 163.com> wrote:
> Hi, Edson and all
>
>     I am making an experiment on Drools Fusion these days. I found it
> consumes a lot of memory. And the
>
> number of rules, the fields of events, the complexity of rules affect the
> memory usage.
>
>     The flow of my experiment is as follow:
>
>     1. I have two tables, one for Transaction, one for account. The
> transaction table have a foreign key
>
>         number which is the primary key of account table.
>
>     2. In one thread, I loaded transaction data and account data into a
> ArrayBlockingQueue, whose size is 100000.
>
>     3. In another thread, I inserted the Transaction as events and the
> related account as facts into the
>
>         Fusion Engine.
>
>     4. I used a java profiler tool to monitor the memory usage of the
> Fusion
> engine, and recorded the
>
> highest heap memory usage of ecah round of my experiment.
>
>    Here is the results:
>
>          Amount of events     highest heap memory usage(MB)
>               5000	                          268
>               10000	                          470
>               15000	                          555
>               20000	                          645
>               25000	                          845
>               30000	                          958
>               35000	                          1011
>               40000	                          1127
>               45000	                          1331
>
> Is this the normal memory usage of Drools Fusion? Otherwise, did I make a
> mistake?
>
> See the attachments for the rules and  Java Model classes . If you are
> intrested in this experiment, I can upload all codes.
>
> Thank you very much.  I will appreciate for your response.
>
> http://drools.46999.n3.nabble.com/file/n4018307/Cep1.drl Cep1.drl
>
> http://drools.46999.n3.nabble.com/file/n4018307/TransactionEvent.java
> TransactionEvent.java
>
> http://drools.46999.n3.nabble.com/file/n4018307/Account.java Account.java
>
>
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