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General Performance Issues Illustrated with a Specific Method

size = " + cs.size()); Long ed = new Date().getTime(); System.out.println ... .person.nic)=:q ) ]] cs size = 7]] listPatientsByIDsWithBasicData - end - 1695401115663 ... )=:q or c.person.phone1=:q or c.person.phone2=:q or lower(c.person.nic)=:q ) ]] cs size

Is it possible to remove parent/child entities without refresh?

();   Assert.assertEquals(4, parentEntity.getChildren().size());   entityManager.refresh(parentEntity); // Reload new state from database   Assert.assertEquals(3, parentEntity.getChildren().size ... ");   entityManager.getTransaction().commit();   Assert.assertEquals(2, parentEntity.getChildren().size

OutofMemory error with Object DB 2.0

The application works fine with only 256MB heap size with objectdb 1.0 But on 2.0 even with max heap size ... .currentTransaction(); // Commit every MAXIMUM_NEW_RECORD_TRANSACTION_SIZE (currently 500) records ... ) && ((writeItemNumber % MAXIMUM_NEW_RECORD_TRANSACTION_SIZE) == 0)) { transaction.commit(); /** In 2.x

Vacuum - Reclaiming Unused Space In Odb

. Our odb files are about 50Gb in size and are written to about a million times a day with both adds ... . Neither execution of Doctor found any errors. Original File Size Post Doctor File Size Outcome 17,281,068 14,038,528 18.8% Reduction 18,572,690 22,776,320 22.6% Increase In Size Can you explain why a database

OutOfMemoryError on search after update on DB created with DB Doctor

. We instruct Object DB to create a 1Gb DB file on initial start-up using: <database> <size ... to create a file that has the opriginal size as the DB input file (or size as specified in the configuration). We create a large file deliberatly as we do not want Object DB to increase its size

500Mb ObjectDb database opening issue

! We gonna work with ObjectDb databases which may have size more than 5Gb and opening database time ... for a database. Opening time is not affected by the size of the database (since during opening ... take more than a fraction of a second to open a database of any size. Please provide more details. If you can make

Threaded Test - Failed to commit transaction: Unexpected internal exception

TestRunnable[runnables.size()]);             MultiThreadedTestRunner mttr = new ... _01 and the default objectDb config. I've limited the test to a jvm size of 1gb (-Xms1g -Xmx1g ... It seems that there was a bug in evaluating the size of cached query results for queries that were run by

Blocked by find

size from <1k to >1MB but the entity object is simple and looks like: @Entity public class ... packaged but with processing and query cache sizes set to 0mb due to issues we've seen in the past ... size (int payloadSize = 1000000;) and have had it hang a couple more times (see attached thread

Memory leak in com.objectdb.o.CST

instance at the end of use. support Support Hi I think you have mistaken shallow heap size as instances ... pool. However, the default size of the connection pool is 50, so it is unclear how there are 132 ... size for those objects? What are the things that affect the sizes of the CST objects? The reason I'm


Annotation Element javax.jdo.annotations.FetchPlan int fetchSize The number of instances of multi-valued fields retrieved by queries. Returns: the fetch size Default value: 0 Since: JDO 2.1

Getting Started

ObjectDB is very easy to use. Follow the Getting Started Tutorial and the Quick Tour manual chapter and in minutes you may be able to write and run first Java programs against ObjectDB.

Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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