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virtual servers and one file

database but the virtualization space is limited then obviously this can cause a performance drop ... cache (a) using ObjectDB Configuration, (b) by setting virtualization with sufficient space for file ... ="access,modify,create,delete"> <quota directories="5" files="20" disk-space="5mb" /> </dir> </user

in-memory and on-disk support?

this space. Getting a continuous unfragmented disk space is the main advantage. Eliminating the need for space allocation later is a small additional advantage. It will only help query performance


taking up space in the tables. kjkrum Kevin ObjectDB is not an RDBMS so there are no tables and columns, but you are right - transient fields consume space in the database only for their definition (several bytes) but not for their values. support Support

General Performance Issues Illustrated with a Specific Method

do you have? What is the total space that they consume (check in the Explorer)? support Support I don't ... . How many Client and Person instances the database contains? How much spaces these classes consume

out of memory error

If ObjectDB doesn't have sufficient heap space then it may throw an OutOfMemoryError ... space). Increasing the JVM heap size could solve the problem, or alternatively, tuning ObjectDB ... of ObjectDB may be able to overcome heap space shortage automatically, but unfortunately currently an OutOfMemoryError is possible. support Support

Best practise loading big data

. Use this thread if loading big data consumes memory space that is not released by ObjectDB in ... references and therefore may use the allocated space for unlimited time. The OS cache ... optimise space. For example in your last test case large amount of memory is used by ArrayList

GC overhead limit exceeded

.InternalException: java.lang.OutOfMemoryError: Java heap space java.lang.OutOfMemoryError: Java heap space ... the process failed to produce a heap dump as the server was running out of disk space at the time so feel

[ObjectDB 2.5.6_05] Unexpected exception (Error 990)

com.objectdb.o.InternalException: java.lang.OutOfMemoryError: Java heap space java.lang.OutOfMemoryError: Java heap space at com.objectdb.o.PAG.<init>(PAG.java:175) at com.objectdb.o.PGC.x(PGC.java ... space. Please try to increase the size of the JVM heap or change the configuration to use less heap size. support Support

Use temporary files to enable very large transactions

) [com.btc.ep.base.dal.tests.it/:na] Caused by: java.lang.OutOfMemoryError: Java heap space at com ... so much. This circumstance is a critical issue for us. btc_es BTC EmbeddedSystems Space in the temporary file

probable error in text of manual about embeddable classes

other entity objects 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

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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