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it. Regarding multithreading speed - currently in ObjectDB embedded mode multithreading improves performance ... threads ). ObjectDB is faster than the alternatives also when using multithreading in writing but the gap becomes smaller, so there may be a place for improvement here. Your test shows that multithreading

Greating again ObjectDB team, Will ObjectDB query engine use multithreading whenever possible ? Thank you indeed ! geekox86 Mohannad AlAwad The ObjectDB engine has an internal mechanism ... before enabling multithreading further, and that is expected in future versions

a multithreaded unit test whith 8 threads each creating 100 objects. The objects that gets created

test that creates, reads and updates these entities in multithreaded application 

How to do multithreading with embedded ObjectDB

. Further, in a multithreaded application every thread usually has its own EntityManager instance

A possible deadlock was detected when new types are registered during multithreading activity against ObjectDB. Until this issue is fixed, the recommended workaround is to complete registration of all the persistable types before starting any  multithreading activity against ObjectDB. A single

NullPointerException when using multithreading

.  With my PersistenceManager multiThreaded =true architecture, I desire to know where ObjectDB ... single PersistenceManager ( multiThreaded =true) makes all my requests sequential ... .  With my described multithreaded and queued architecture, with high throughput, especially

is executed in parallel using multithreading , so one user thread that runs queries will not block ... execution and multithreading in this previous thread . References from objects in one database

multiple processes (embedded mode supports concurrently only within a JVM, i.e. multithreading ... supports concurrently only within a JVM, i.e. multithreading , but not accessing the database from

process, and multi user support may be achieved only by multithreading (several threads) in a single ... are on the same machine. Because embedded database mode supports multithreading , and the web server handles

.option.NontransactionalWrite", "false"); properties.setProperty("javax.jdo.option. Multithreaded

multithreaded application). When I create a child entity in one transaction and then remove it in

is multithreaded . Try to get more details if this happens again. You may also try accessing the fields

When I use explorer.exe to browse the database in objectdb, eclipse tells me another app occupy it, then how can objectdb support multi-thread? gzdillon Lai Yang Multithreading refers to the ability to use the same database in multiple threads of the same process (same JVM) simultaneously

ObjectDB uses multithreading internally for query execution, when possible. support Support

Is it possible to query and commit on the same persistence manager (i.e. same odb file) at the same time? jake Jake Hang Multithreading is fully supported by ObjectDB, so you can query and update the database at the same time using multiple threads. However, if all the threads share the same

on the observable behavior of multithreaded code. When I run this example and examine the database

you wrote, it is difficult to see how one JVM affects the other. Do you also have multithreading access

below,please see it once. Thank you. Bimal Bimal kumar dalei Usually multithreading with JPA involves

the PersistenceManagerFactory have javax.jdo.option.Optimisitic and javax.jdo.option. Multithreaded

PersistenceManager, which is set for multiThreaded =true. * There are a limited number of threads

Hi, we are using Embeded objectDB 2.4.4_06 in a highly multithreaded concurrent manner and we have noticed a performance problem in our application that seems to be attributed to ObjectDb's internal locking. When profiling our app in JVisualVm we notice a large number of threads are blocked

that you can still have  OptimisticLockException thrown even with no multithreading if you use multiple

these two exceptions. Maybe both exceptions are caused by using ObjectDB under heavy multithreading . It seems that your application uses   multithreading much more extensively than other applications that use ObjectDB. Probably ObjectDB has still some multithreading issues that require fixes. Any test

multithreaded type registration. Unfortunately this is an issue that we are aware to but couldn't ... . start the multithreaded load test with a database that already has all the types. Types

setting. Since: JDO 1.0 boolean getMultithreaded () Get the default Multithreaded setting for all PersistenceManager instances obtained from this factory. Return: the default Multithreaded setting ... ) Set the default Multithreaded setting for all PersistenceManager instances obtained from

that we are interested in Return: the objects Since: JDO 2.1 boolean getMultithreaded () Get the current Multithreaded flag for this PersistenceManager . Return: the Multithreaded setting. See Also: setMultithreaded ... ) Set the Multithreaded flag for this PersistenceManager . Applications that use multiple threads

on Schema Update during Multithreading activity ( issue #1139 ). Fixed a bug in loading mapped (inverse

to the DB.  When running the app without the multithreading , no errors are coming. jakab Gergely Jakab

. but why can we have such a behaviour ? It is only happening under heavy multithread load  hgzwicker Hans-Georg Zwicker

multithreading problems when using new types simultaneously ( issue #950 ). Fixed a problem

bugs in using flush. Fixed bugs in cascading merge. Fixed a multithreading deadlock bug . Fixed a bug

though!) The test dies after a few minutes of running. I've attached the code, the multithreaded unit test library

can happen when using DELETE or UPDATE queries in a multithreaded application. A transaction

Added support for casting from boolean to int in queries. Changed default value of . Fixed a critical Explorer bug that interferes with queries on enum fields. Fixed a multithreading conflict (missing synchronization) in the JPA metamodel API. Fixed implementation of casting ( as ) in criteria queries.

JDO Method in javax.jdo.PersistenceManagerFactory void setMultithreaded (   boolean flag ) Set the default Multithreaded setting for all PersistenceManager instances obtained from this factory. Parameters: flag - the default Multithreaded setting. Since: JDO 1.0

JDO Method in javax.jdo.PersistenceManagerFactory boolean getMultithreaded () Get the default Multithreaded setting for all PersistenceManager instances obtained from this factory. Return: the default Multithreaded setting. Since: JDO 1.0

JDO Method in javax.jdo.PersistenceManager boolean getMultithreaded () Get the current Multithreaded flag for this PersistenceManager . Return: the Multithreaded setting. See Also: setMultithreaded Since: JDO 1.0

JDO Method in javax.jdo.PersistenceManager void setMultithreaded (   boolean flag ) Set the Multithreaded flag for this PersistenceManager . Applications that use multiple threads ... . Parameters: flag - the Multithreaded setting. Since: JDO 1.0

.NontransactionalWrite", "javax.jdo.option. Multithreaded ", "javax.jdo.option.ConnectionUserName

. Multithreaded ", "javax.jdo.option.ConnectionUserName", "javax.jdo.option.ConnectionPassword", "javax.jdo