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General Performance Issues Illustrated with a Specific Method

;general> <logger name="*" level="info" />  <logger name="query" level="debug

Intermittent Server Shutdowns Due to Out of Memory (OOM) Issues

;logger name="*" level="info" /> <!-- <logger name="query

ClassNotFoundException messages in the log file

these messages. Add the following line to the logger_elements">configuration:     <logger name="type.loader" level="warning" /> support Support

Memory Leak?

%10000==0) {     logger("Retrieved " + j + " objects. Last object: " + d);   ... .getTransaction().commit();    em.close();   }     logger("Retrieved %s

Does aggregate function "greatest" work on entity objects?

; @Override public int compareTo(Object t) { //Logger.getLogger("------------").log ... ())); //Logger.getLogger("------------").log(Level.INFO, this.toString() + " compareTo " + t.toString

How to delete M2M relationship?

()) { transaction.rollback(); } logger.error("Error making database call for update timeslot status"); ex.printStackTrace(); } catch (Exception e) { logger

Adding EntityListener Throws Unexpected Internal Exception

onPostLoad(Object o) {         Logger.info("PostLoad call.");   ... ) {         Logger.info("PreUpdate call.");    

EntityManagerFactory Fails To Swtich Over To Slave When Master Is Unavailable

;              <logger name ... ;            <logger name="*" level="info" />

com.objectdb.o.InternalException: java.lang.ArrayIndexOutOfBoundsException: null:

(InstantiationException ex) { logger.log(Level.SEVERE, null, ex); } catch (IllegalAccessException ex) { logger.log(Level.SEVERE, null, ex); } catch (IllegalArgumentException ex) { logger.log(Level.SEVERE, null, ex); } catch

[ObjectDB 2.2.6_02] Unexpected exception (Error 990) at com.objectdb.o.OBC.aJ(OBC.java:961)

.logging.Logger; import javax.persistence.EntityExistsException; import javax.persistence ... ); } catch (Exception ex) { Logger.getLogger(ReproduceTest.class.getName()).log(Level.SEVERE