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Significant I/O costs during batch update or insert data.

Our application has some complex entities. We do batch update(merge detached entity) every 2 minutes. We find the period significant IO costs these days, and disappeared when turn off the batch updating. 1.ObjectDB is in embedded mode. 2.ObjectDB version is 2.3.7 3.Database file size is nearly

Intermittent Exception "Attempt to update types in read only mode"

" [ObjectDB 2.4.1_06] javax.persistence.PersistenceException Attempt to update types in read only mode (error ... .java:48) Caused by: com.objectdb.o.UserException: Attempt to update types in read only mode

Schema Update: class hierarchy change

that should fix this issue. support Support Thanks for the Update. Now it works. How can data be saved

Indexes broken after schema update.

Anyone else noticed this? I updated an entity Object with some new fields, restarted the database to pick up the new schema and now none of the indexes work, except the @Id. I can query by any field that is not indexed on the existing Object but as soon as I try and query against a field

schema update procedure

Is there a specific procedure that we should follow when making schema updates? I have often found that it takes several restarts of the the server to complete the change. The issue is that there may be changes in many places. Each change appears to be applied as the class is first encountered

Getting Unexpected internal exception when updating entity in MEM db

.EMImpl.merge(EMImpl.java:307) at org.vn.radius.cc.server.db.RtDB.Update(RtDB.java:101) ... 10

JPQL Update & Delete (JPA 1.0)

JPQL (Java Persistence Query Language) supports updating and deleting database objects by queries. Currently ObjectDB supports only JPQL SELECT (retrieval) queries. Delete queries are supported ... one of the next builds. support Support Implementation of both DELETE and UPDATE queries was added in build 2.2.3_03. support Support

Collection update does not increase entity version and is not persisted

(all classes are enhanced) the version of the event does not increase and the updated event is not stored ... ) attachments = new ArrayList<>(); return attachments; } and update addAttachment

Database Management Settings

" synchronized="false" />   <index-update enabled="true" priority="40" /> <query-cache results ... , to avoid thread competition that leads to poor performance. The <index-update> element   <index-update enabled="true" priority="40" /> The <index-update> element specifies how newly defined indexes

Indexes broken after schema update

, when new fields were added, whether or not the entity was updated, etc.). support Support I'll dig

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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