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Manual
12

Updating JPA Entity Objects

Modifying existing entity objects that are stored in the database is based on transparent persistence, which means that changes are detected and handled automatically. Transparent Update Once an entity object is retrieved from the database (no matter which way) it can simply be modified in memory
Manual
12

Obtaining a JPA Database Connection

updates are collected and managed in memory and applied to the database when the transaction
Manual
12

JPA / JDO Class Enhancer

with ObjectDB Enhancer as a Java Agent, every loaded class is checked and automatically enhanced in memory
Manual
12

SELECT clause (JPQL / Criteria API)

less memory. SELECT DISTINCT Queries that use projection may return duplicate results. For example
Issue
4

Use temporary files to enable very large transactions

flush() and detach()). But an array of bytes, any ObjectDB memory, still allocates a lot of memory ... to a temporary file. Even without speed optimizations, but with priority on the memory usage. Ideally ... that can address your needs. Particularly the unlimited size. The memory problem is with Page
Issue
3

stress test -> com.objectdb.o.InternalException: null

, to know how to set the sample. Good/bad news! It seems that Tomee runs out of heap memory ... of memory usage, but using ODB as embedded changes the situation. With a heap of 100 MB, Tomee runs out of memory in ~20 minutes. With a heap of 512 MB, in around 240 min (4 hours). Both cases were tested
Forum
3

Soft Reference Object Cache Recommendation

on the Memory Tab).  Gigabytes of RAM was freed up, and the screenshot shows what did NOT get freed ... the JdoBlob2 via persistenceManager.deletePersisted(jdoBlob2) then the memory gets freed by the next full GC.  I can also close the PersistenceManager and all the memory then can be freed.  I
Forum
2

Caching/Paging Questions...

the results in memory somehow, would that speed up the execution of the second query since many of its result objects already created and reside in memory ? Q2: Do I need to manually use strong ... and keep them in memory longer automatically somehow before GC takes place ? Q3: What is the maximum memory
Forum
2

Duplicatable and Disposable JPA Repository for Unit Testing

Hi Folks, I seek an in-memory JPA implementation which can be easily instantiated, populated ... , Robin. Currently ObjectDB does not support pure memory storage, but you can run it on a RAM drive to get the effect of a memory database. It would probably be faster than any existing JPA / Memory
Forum
2

Objectdb server out of heap space

where it runs out of memory like this.  This could be a serious problem for out deployment ... , and so should never end up in a situation where it runs out of memory like this. Servers that run on Java JVM ... of VM options for tuning memory.  A server process, if it is to be reliable, should be able to monitor