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Manual
3

Database Management Settings

. The resize attribute specifies the size by which to extend the database file when additional space is needed. Small initial size and resize values save space. Larger values can improve performance by ... ="128mb" /> When enabled, a recovery file is created by ObjectDB when a database is opened
Manual
3

JPA Entity Fields

(Mapped By) fields Primary key (ID) fields Version field The first three groups (transient, persistent ... Fields Every non-static non-final entity field is persistent by default unless explicitly specified otherwise (e.g. by using the @Transient annotation). Storing an entity object in the database does not
Forum
3

EntityManagerFactory Fails To Swtich Over To Slave When Master Is Unavailable

when the master is unavailable. I simulate the master unavailable by stopping the master server ... .EMF.createEntityManager(EMF.java:253) at tutorial.Main.main(Main.java:22) Caused by: com.objectdb ... .objectdb.jpa.EMF.createEntityManager(EMF.java:250) ... 1 more Caused by: java.net.ConnectException
Issue
3

log entry and massive performance issues

-- set up a non optimized query (simple select) >>> our application step by step blows up (as ... was terminated by the timeout that we have set (200 seconds) ad 2: unfortunately we cannot step ... should be followed by an exception, do you have a stack trace of such an exception in the log? Did
Manual
3

Locking in JPA

update collisions resulting from simultaneous updates to the same data by two concurrent users. Locking ... by another transaction. When using ObjectDB, optimistic locking is enabled by default and fully ... is automatically increased by one. Version numbers are managed internally but can be exposed by defining a version
Forum
3

Problem with distinct select, order by and equivalent alias/attribute path

when ordering the results of some projection when the order by expression is different (though logically ... _location "             + "order by s_location.id asc";         System.out.println("Working query ... "             + "left join s.location as s_location "             + "order by s.location.id asc
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2

java.lang.NullPointerException when using ORDER BY

== 0)) ORDER BY r.startDateTime DESC If we remove the ORDER BY part, the query completes OK ... : Caused by: java.lang.IllegalStateException: com.objectdb.o.InternalException: Unexpected internal ... more                                                                                           Caused by: com.objectdb.o.InternalException: Unexpected
Forum
2

Mapped By Fetch is very Slow

Well ! I think i pointed out a HUGE performance issue with mapped-by attribute (yeah ... , go the MyEntity class and remove "mapped-by". You obtain 1 second max of query fetch. So my performance issue ... .ALL,mappedBy = "myEntity") // Test by adding / remove "mappedBy" public MyEntityChild getEntityChild
Forum
2

Schema Evolution Question

the following steps: Stop old client application. Stop ObjectDB. Start ObjectDB. Start NEW client ... Thank you!   The correct steps are: Stop old client application with the old schema. Stop ObjectDB server. Start ObjectDB server. Start new client application with the new schema. I followed these steps
Forum
2

Strange behaviour with ORDER BY and IN

Hi, after trying out objectdb for a while now and being quite impressed by its speed and overall performance I noticed a strange behaviour where an ORDER BY - directive isn't executed as ... by a simple member (e.g. a String) being the Entity-ID and, at the same time, filter on this member