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12

Inserted entities with strings as keys and indices needs more and more ram memory in comparing to primitive integers as keys and indices

. This difference becomes larger when the total number of objects of that type in the database increases. Less space ... to the maximum with new objects. Long values consume less space than String UID and are processed faster ... primary key) will take less space. Use flush during large transactions with temp file enabled
12

Shrinking Database Files

never shrinks when large number of objects are deleted and the only way to reclaim that space would be with Database Doctor. Is there a way to reclaim database file space? Is it worth trying to reclaim space? (It may not be if it is a lengthy operation, or it tends to make the file more fragmented
11

Database size is much larger than expected (x2)

transaction: Java heap space (error 613)         at com.objectdb.jpa.EMImpl.commit(EMImpl.java:277 ... :123) Caused by: java.lang.OutOfMemoryError: Java heap space         at com.objectdb.o.BYW.r(BYW.java ... ) ... 2 more Caused by: java.lang.OutOfMemoryError: Java heap space at com.objectdb.o.OBH.c(OBH.java
11

Failed to synchronize replicated database

if the database is very large, and may cause issues if there is no sufficient space on the disk ... , how many transactions should be recorded. How we can properly manage disk space used by recording? I ... to the basepoint and deleted later to save disk space? thamal Tomas Hamal The recording files
11

Doctor - high memory usage

to set heap space to at least 450MB. Even then whole process takes ages. Optimal setting ... space to only scan database file. lwalkowski Lukasz Walkowski Since new computers today ... .OutOfMemoryError: Java heap space at com.objectdb.o.VLV.p(VLV.java:270) at com.objectdb.o.DRH.e(DRH.java
3

javax.persistence.EntityExistsException

is the concatenation of: the name of the class of this object ": " (a colon and a space) the result of invoking
3

javax.persistence.RollbackException

": " (a colon and a space) the result of invoking this object's getLocalizedMessage method
3

Server out of memory exceptions

reports this as: [2011-07-29 23:28:41 #20 server] java.lang.OutOfMemoryError: Java heap space [2011-07-29 23:28:41 #21 server] java.lang.OutOfMemoryError: Java heap space at java.net ... : Java heap space java.lang.OutOfMemoryError: Java heap space and: [2011-07-31 22:49:01 #18 tool
2

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
0

toString()

Method java.lang.Throwable String toString() Returns a short description of this throwable. The result is the concatenation of: the name of the class of this object ": " (a colon and a space) the result of invoking this object's getLocalizedMessage method If getLocalizedMessage returns null

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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