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Tutorial
8

Step 4: Add a Controller Class

entity object is constructed and stored in the database. Processing is forwarded to a JSP page ... component to display the existing Guest objects. The returned ModelAndView object defines a target JSP
Tutorial
8

Step 4: Add a Controller Class

Guest entity object is constructed and stored in the database. Processing is forwarded to a JSP page ... the GuestDao component to display the existing Guest objects. The returned ModelAndView object defines
Forum
8

object creation during pmf.getPersistenceManager()

Hi   We have observed that during pmf.getPersistenceManager(), objectdb is creating object ... that transaction we will create instances for all classes. The number of objects created during this invocation is really huge, that causes OutOfMemory during commit (memory for jvm 1,4GB). The object
Forum
8

Delete object from collection versus delete from JPQL

between memory and database objects. See these manual pages for more details: DELETE queries UPDATE ... relationship between the objects in memory and ObjectDB.  I know I can modify the objects and use persist() to write them to the database.  But does running a JPQL update or delete alter the in-memory
Forum
8

ObjectDB 2.6.9_06 (embedded): Cascading merge resulting in duplicate objects

this class. If I load a NaturalPerson entity from the database, then add a new address to the object's "addresses" list and use EntityManager.merge(object) to persist it along with the new address ... This issue maybe related to issue #110 (http://www.objectdb.com/database/issue/110
Issue
8

Database File Compression

ObjectDB database files are usually smaller than database files of other Database Management Systems (object databases and relational databases) but additional internal compression is still possible ... . So the effect of using compressed ObjectDB database file on performance is unknown yet.
Forum
8

Performance with large databases

a larger database. Is fetching an object by the id faster than fetching by an indexed field, or ... When populating a large database (10s of GBs) performance drops suddenly at a certain time whenever I run the populating application.  Is there typically a database size when indexes can no longer
Forum
8

Using the wrong class to access a database

the Point database described in the Getting Started section: package com.objectdb.tutorial ... if I can access the database from here. This program is almost the same as the first; it only calls ... are working fine, but the third ruins the database: - The number of entries is zero. - running the app
Issue
8

Sort of very large objects - out of memory

the following actions: 1) Create 5 persist threads which create and persist a large object in a loop 100 times each 2) Create 5 get threads which read 100 objects each in a loop based on object ... of "live" data in play at any time. The objectdb cache settings are low in the config - database
Forum
8

"Attempt to lock a non entity object" error

Probably a simple answer for someone who's been using ObjectDB for awhile: I'm reading objects from the database outside a transaction (inside doesn't seem to matter). First cycle of doEdit ... object" session.rollback() is somehow causing the problem (found through debugging