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144

Vacuum - Reclaiming Unused Space In Odb

and updates. This is creating a lot of unused space in the database that we are wanting to reclaim ... feature appears to copy the dead space as well so isn't performing the vacuum. If there is no way ... up and want to do this as efficiently as possible. Thanks! CAPdev CAP Dev Unused space in
143

Failed to commit transaction: Java heap space (error 613)

.RollbackException Failed to commit transaction: Java heap space (error 613) We are using ObjectDB 2.4.6_10, JDK 7, and a 30GB heap space. The exception above took our server into an non-responsive state but left the JVM up, thus didn't trigger the automatic restart. If the heap space is exhausted, we'd
137

Objectdb server out of heap space

I have had a server crash with the following stack trace: java.lang.OutOfMemoryError: Java heap space at java.nio.HeapByteBuffer.<init>(HeapByteBuffer.java:57) at java.nio.ByteBuffer.allocate(ByteBuffer.java:331) at sun.nio.cs.StreamEncoder.<init>(StreamEncoder.java:195) at sun.nio.cs
63

Server User List

|modify|create|delete"> <quota directories="5" files="20" disk-space="5mb" /> </dir ... ="access|modify|create|delete"> <quota directories="5" files="20" disk-space="5mb" /> </dir ... <quota directories="5" files="20" disk-space="5mb" /> Every <dir> element may contain one optional
28

How to check what is taking most space in DB file

out which entities occupies biggest portion of file space? For example, to be able to see how many space individual ... the Explorer (on the Schema tab) about the space in bytes that each entity type consumes (for storing ... . We found out an entity consuming more than 50% of space (we have over 100 entity classes), which we can investigate now. thamal Tomas Hamal
23

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 ... that specifies the space that should be available for the recovery file (ObjectDB might use more space
20

JPA Persistable Types

and do not require separate space allocation and separate store and retrieval operations. Therefore, using embeddable classes can save space in the database and improve efficiency. Embeddable classes ... ) annotation has several benefits: It saves space in the database. It is more efficient (storage
16

Strings in JPQL and Criteria Queries

] FROM] str) function returns a string after removing leading and/or trailing characters (usually space ... to 'UK'. By default, space characters are removed, but any other character can also be specified: TRIM
16

Index Definition

. Index management introduces overhead in terms of maintenance time and storage space, so deciding ... to the entities that contain that value. Indexes require maintenance time and consume storage space
2

[ODB1] Chapter 4 - JDO Metadata

and storage space. When extent management is not needed, it can be omitted by specifying requires ... objects can reduce storage space and improve efficiency, but they do not have an object ID ... of maintenance time and storage space, so deciding which fields to define with indexes

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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