Max-instances-per-pk attribute

Does anybody know what is "max-instances-per-pk" attribute in
<entity-deployment> element in orion-ejb-jar.xml file?
I'm using oc4j version:
E:\oc4j\j2ee\home>java -jar oc4j.jar -version
Oracle9iAS (9.0.2.0.0) Containers for J2EEand when I deploy my CMP EJB I get this attribute added to my orion-ejb-jar.xml file with value 20!!!!!
And when I try to create (or findByPrimaryKey) many beans with
the same primary key, after 20 my server is hanging and I get timeout exceptions:
for (int i=0; i<100; i++) mybean.findByPrimaryKey("1");
when i==20 I get:
com.evermind.server.ejb.TimeoutExpiredException: timeout expired waiting for an instance
at com.evermind.server.ejb.DBEntityWrapperPool.getWrapperInstance(DBEntityWrapperPool.java:189)
at com.evermind.server.ejb.DBEntityEJBHome.getWrapperInstance(DBEntityEJBHome.java:135)
at CatalogHome_EntityHomeWrapper10.findByPrimaryKey(CatalogHome_EntityHomeWrapper10.java:302)
at pl.empolis.delta.modules.catalogman.CatalogManagerBean.getCatalogEntryByPublicID(CatalogManagerBean.java:56)
at CatalogManager_StatelessSessionBeanWrapper6.getCatalogEntryByPublicID(CatalogManager_StatelessSessionBeanWrapper6.java:734)
at java.lang.reflect.Method.invoke(Native Method)
at com.evermind.server.rmi.RMICallHandler.run(RMICallHandler.java:80)
at com.evermind.util.ThreadPoolThread.run(ThreadPoolThread.java:62)
How do I set this value to infinity?
Why I can not find any documentation about this?????
Please help,
Artur

Artur -- max-instances-per-pk controls the size of the pool of wrapper instances for OC4J. I would just set it to a very large
integer value. It will be documented in the production release of the EJB guide but for now here is a section from
book. Also, the cache will be able to be disabled but that function was not in the pre-release. Lastly, we should be
posting some of the documentation very soon (look for an announcement) so that will help to clarify some things.
The wrapper instance is OC4J-generated wrapper code that provides for the
services requested in the deployment descriptor. Before the bean instance is
invoked, the client retrieves a handle to the wrapper instance. When the client
invokes the bean, the wrapper is associated with a bean instance.
The max-instances-per-pk attribute sets the maximum entity bean
wrapper instances allowed in its pool for a given primary key. An entity beans
wrapper code can be pooled if it is not used by a client.
The default maximum value is 50. Set the maximum wrapper instances as
follows:
<entity-deployment ... max-instances-per-pk="20"
</entity-deployment>
Set the minimum wrapper instances as follows:
<entity-deployment ... min-instances-per-pk="2"
</entity-deployment>
Thanks -- Jeff

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