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databases with JPA and JDO concurrently . The use of API does not affect the database file format. support Support

this case. It may be possible to improve performance by tuning the configuration (e.g. the maximum concurrent threads ). support Support

another concurrent transaction that cannot yet see the operations of the first transaction. The connection

Hello, it is possible to use an entity attribute of type java.util. concurrent .ConcurrentHashMap Your web site http://www.objectdb.com/object/db/database/features 'Object Model & Data Types' has no guidelines about this data type. Best regards btc_es BTC EmbeddedSystems You can persist a Map field

In the docs, all serializable types should be persistable. However, when I tried to persist a field of type AtomicInteger, I got the following message: Message: Failed to commit transaction: Attempt to store an instance of a non persistable type java.util. concurrent .atomic.AtomicInteger I am using

production (see this stackoverflow thread ) and can serve 200 or more concurrent connections in client-server mode. support Support

Hello All, Can objectdb handle client - server connections from over 200 users? Can it be efficiently used in client-server mode? Code examples where possible will be appreciated. Thank you. Regards kaybel ebele ObjectDB can handle concurrently 200 users (or more). The maximum load

; OptimisticLockException  is thrown when that version number indicates a concurrent update by another user (using

file concurrently (queuing additional threads if any). The number of working threads in embedded mode

. concurrent .TimeUnit . Could you please check if after changing the type of that field, e.g. to java.lang

. This is demonstrated for example on this tutorial . For real concurrent multi threading you just have to use

is locked for a single process. Use client-server mode or embedded-server mode to enable concurrent

seem to be related to ObjectDB but to concurrent access to an unsynchronized ArrayList . It is unclear

call to the PersistenceManagerFactory , locking down set/get methods of the Symbol class via java.util. concurrent

yet why the slowness happens only with virtualization and about 3 concurrent users. Hopefully profiling

concurrently can cause exactly this issue of structural issues (orphan pages and page with multiple

. If you only use small databases, not too many concurrently , and with no other activities

, but there is still a need to hold multiple versions for concurrent transactions in order to support  MCC . support

). Fixed a NullPointerException on concurrent access of first object of an entity class. Fixed bug

versions with the concurrent read queries that have been solved for us with that version. We double

an option for possibly improved concurrent database file access. Added automatic logging of query details

the database by a concurrent thread while the query was executed? Any other details regarding

several concurrent committing transactions together and reducing the number of sync operations by sync

. Our system has a load of around 400 concurrent webSocket connections that normally only query (without updates

the discussion: Use issue #2087  to discuss using a large number of concurrent open databases

of reflection mode (no enhancement) by minimising  tracking backups. Improved concurrency by using

EntityManager and its factory concurrently . Solved a possible issue with closing the ODB-WeakRefPurger daemon thread.

that thread) then you must make sure that the ObjectDB database file is never accessed concurrently by

EntityManager and its factory concurrently . Solved a possible issue with closing the ODB-WeakRefPurger daemon thread.

and about 100 concurrent threads reading and writing to the DB per second. Thanks Trianglehead Json

, number of concurrent users, JVM heap usage, GC activity, etc? support Support Did you have these query

Fixed unstable  activation issues. Fixed  issue #2954  - using IS NULL (or == null) on parameters in queries. Fixed automatic schema update on renaming or moving an enum type. Fixed issue #2964  (critical) - concurrent update of large objects with version-check=false.