csab79 [http://community.jboss.org/people/csab79] created the discussion "Embedded Many-to-one performance issue" To view the discussion, visit: http://community.jboss.org/message/585635#585635 -------------------------------------------------------------- Hi hibernate gurus! I have experienced the following issue: I have a class with some properties and 5 many-to-one relationship. <?xml version="1.0"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" " http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> <hibernate-mapping>     <class name="hibernate.classes.Fszerzfej" table="FSZERZFEJ" catalog="dev1">             <id name="ffId" type="int">                 <column name="FF_ID" />                 <generator class="identity"/>             </id>             <property name="ffSzerzszam" type="string">                 <column name="FF_SZERZSZAM" />             </property>             <property name="ffUgyfelkod" type="string">                 <column name="FF_UGYFELKOD" />             </property>             <property name="ffUgyfelnev" type="string">                 <column name="FF_UGYFELNEV" />             </property>             <property name="ffStIdRegio" type="int">                 <column name="ST_ID_REGIO" />             </property>             <property name="ffSzerztipus" type="int">                 <column name="FF_SZERZTIPUS" />             </property>             ...             ...             ...           <many-to-one name="regio" class="hibernate.classes.Choicerows" fetch="join" insert="false" update="false">                       <column name="ST_ID_REGIO" not-null="true" />                   </many-to-one>             <many-to-one name="sterulet" class="hibernate.classes.Sterulet" fetch="join" insert="false" update="false">                       <column name="ST_ID_TELEPULES" not-null="true"/>                   </many-to-one>             <many-to-one name="szerzst" class="hibernate.classes.Choicerows" fetch="join" insert="false" update="false" >                       <column name="FF_SZERZST" not-null="true" />                   </many-to-one>             <many-to-one name="ufkodtipus" class="hibernate.classes.Choicerows" fetch="join" insert="false" update="false" >                       <column name="FF_UFKODTIPUS" not-null="true" />                   </many-to-one>             <many-to-one name="szerztip" class="hibernate.classes.Choicerows" fetch="join" insert="false" update="false">                       <column name="FF_SZERZTIPUS" not-null="true" />                   </many-to-one>     </class> </hibernate-mapping> My another class is using fszerzfej class also with many-to-one ralationship: <?xml version="1.0"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" " http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> <hibernate-mapping>     <class name="hibernate.classes.Fszerzpont" table="FSZERZPONT" catalog="dev1">                   <id name="fpId" type="int" >                                         <column name="FP_ID" />                                         <generator class="identity" />             </id>             <property name="fpFfId" type="int">                 <column name="FP_FF_ID" />             </property>             <property name="fpPontnev" type="string">                 <column name="FP_PONTNEV" />             </property>             <property name="fpStRegio" type="int">                 <column name="FP_ST_REGIO" />             </property>             <property name="fpStTelepules" type="int">                 <column name="FP_ST_TELEPULES" />             </property>             <property name="fpIranyitoszam" type="string">                 <column name="FP_IRANYITOSZAM" />             </property>                ...                ...             <many-to-one name="regio" class="hibernate.classes.Choicerows" fetch="join" insert="false" update="false" >                       <column name="FP_ST_REGIO" not-null="true" />                   </many-to-one>             <many-to-one name="sterulet" class="hibernate.classes.Sterulet" fetch="join" insert="false" update="false" >                       <column name="FP_ST_TELEPULES" not-null="true" />                   </many-to-one>             <many-to-one name="szerzodesAllapot" class="hibernate.classes.Choicerows" fetch="join" insert="false" update="false">                       <column name="FP_SZERZST" not-null="true" />                   </many-to-one>             <many-to-one name="tipus" class="hibernate.classes.GyujtopontTipusok" fetch="join" insert="false" update="false">                       <column name="gyujtopont_tipus_id" not-null="true" />                   </many-to-one>             <many-to-one name="szerzodes" class="hibernate.classes.Fszerzfej" fetch="join" insert="false" update="false" >                       <column name="FP_FF_ID"/>                   </many-to-one>             </class> </hibernate-mapping> The impact is occuring when i am using fszerzpont class the fszerzfej many-to-one relationships fetching mode will be lazy=false. I dont understand this bahaviour, i am not using getters exampl from  fszerzfej.regio, fszerzfej.sterulet, fszerzfej.szerzst, fszerzfej.ufkodtipus, fszerzfej.szerztip I am using this relations only from fszerzfej, not from fszerzpont. I assume lazy fetching should doing this but i am surprised why not :S How could i tell Hibernate do not use load thoose many-to-one- relations into memory? My other question is about lazy group fetching. I have read many article but i cant achive to work properly. Bulidtime ant instrumentation does not work for me :S  I appreciate any help! best regards!   Csaba -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/585635#585635] Start a new discussion in EJB3 at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]