For JPA beans (3.0 entities) the cache/pool settings are controlled by
the JPA implementation. If you haven't explicitly set a JPA provider,
you will get OpenJPA.
FWIU, OpenJPA doesn't use an object pool since JPA objects are cheaper
to create on the fly then it costs to pool instances (I don't think
any of the JPA providers use object pools). As for cacheing, the
default OpenJPA caches uses a clever combination of weak and soft
references so the cache is largely managed by the vm.
JPA is a really different beast than BMP or CMP and the configuration
and tuning are quite different. I suggest you profile you application
to see if it is running within in your acceptable performance range
(you should decide on the acceptable range before profiling to avoid
adding unnecessary complexity to your application). If it isn't, I'd
start by reading the OpenJPA (assuming that is your provider) user
manual, specifically the caching chapter (http://openjpa.apache.org/docs/latest/manual/ref_guide_caching.html
). You can always ask for help with tuning here, but for OpenJPA
specific questions you may be better served on the OpenJPA users
mailing list.
-dain
On Mar 31, 2008, at 11:30 AM, the666pack wrote:
ok thank you,
i hope that someone can bring some light in this question.. it would
be
important for me to know how to "tune" the ejb3.0 container and thus
speed
up the ejb handling. especially i am interested in
- pool size for persistent entities (ejb 3.0)
and IF it is possible to tune this at all.
i thank you for your help,
mario
manucet wrote:
Umm those apply to only CMP and BMP. Regarding entities I am not
sure.
Probably Dain or David Blevins can throw more light here.
Regards
Manu
On Sun, Mar 30, 2008 at 11:49 PM, the666pack <[EMAIL PROTECTED]>
wrote:
thanks for your reply,
so i am using EJB 3.0 with standard annotations, are these now CMP
or
BMP? i
thought this diversification does just apply to EJB 2.1..
more: so this means that if EJB 3.0 are Container Managed Beans, i
cannot
set the pool size of the entity pool manually? because in the link
there
is
just mentioned one property " CmpEngineFactory".
or am i wrong?
greetings,
mario.
manucet wrote:
Hi Mario,
Feel free to ask as much questions as you want thats what
this list is for :).
The properties need to be set in the corresponding EjbContainer
GBeans. The properties that are exposed by OpenEJB are actually
given
in the link below
http://openejb.apache.org/example-generated-documentation.html.
You need to set the properties in the corresponding Container
GBeans
or as system properties.
1) Setting system property
If you set it as a system property then you will need to use the
format
<container_name>.<property_name>.
An example of setting the system property is given in one of my
previous mails to you
http://www.mail-archive.com/[EMAIL PROTECTED]/msg09381.html
2) Setting on the container Gbeans
If you are setting the individual gbeans with the properties you
can
give just the property name followed by the value in the
config.xml.
eg:
<module name="org.apache.geronimo.configs/openejb/2.2-SNAPSHOT/
car">
<gbean name="EJBNetworkService">
<attribute name="port">${OpenEJBPort +
PortOffset}</attribute>
<attribute name="host">${ServerHostname}</attribute>
</gbean>
<gbean name="DefaultStatelessContainer">
<attribute name="properties">TimeOut=10
StrictPooling=false
PoolSize=15</attribute>
</gbean>
</module>
This is how we can set some properties for the stateless container.
The GBean names are
DefaultStatelessContainer,DefaultStatefulContainer
,DefaultBMPContainer and DefaultCMPContainer. There is no Gbean
corresponding to the MdbContainer but you can set values on the
MdbContainer using the system property method
Regards
Manu
On Sun, Mar 30, 2008 at 1:41 PM, the666pack
<[EMAIL PROTECTED]>
wrote:
hello,
sorry that i bring this topic on again, but it would be important
for me
to
find out how or where to change the EJB-container settings in
geronimo.
as
the ejb-container in geronimo is OpenEJB i hope that here is
someone
who
can
tell me this. Most important would be where to set
-Entity Bean Pool Size (max-pool-size)
-Strict-Pool-Size (if available)
-Commit Option
i was searching but i did not find a possibility to change these
options
in
geronimo OpenEJB entity container. i hope that someone can help me
out
with
this and thank you for your help.
greetings,
mario
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