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128

Size of recording directory keeps growing

bigger that the main database file (*.odb .. 182 MB). My question: How to limit the size or history of recording? Is there any setting in configuration file? Thank you Below are sizes of our database
128

odb file size doesn't shrink

Hello, why delete from ... doesnt modify size of odb? Even in in embedded mode, and in server mode i use recovery, not recording mode. mastervoland Vladimir Sadovnikov When objects are deleted from the database their space is marked as unused and becomes available for future objects. The size
126

Speeding up reporting queries with size() on list

Hi, I'm working on some reporting stuff in our application. One of few different reports should include activity on last modified objects. The query for now looks like this: select date(insp.lastModificationDate), insp.modifiedBy, insp.description.length(), insp.products.size(), insp.picture
126

Max transaction size

What’s the max transaction size, or how is it determined? Trianglehead Json Error The main limit is the available memory in the JVM. There is no hard limit. support Support
26

Transaction size limit

Although I read in this post https://www.objectdb.com/forum/2606 that the size of the transaction ... TransactionTooBigException. But what would help us most, would be a way to check the current size of the transaction ... : java.lang.OutOfMemoryError: Requested array size exceeds VM limit at com.objectdb.o.FIW.m(FIW.java
24

General Settings and Logging

" />   <url-history size="50" user="true" password="true" /> <log path="$objectdb/log/" max="8mb ... for data that exceeds a limit size that is specified by the threshold attribute. The mb and kb suffixes ... -history size="50" user="true" password="true" /> ObjectDB manages a list of the recently accessed
22

Collections in JPQL and Criteria Queries

if the collection is empty and TRUE otherwise. SIZE The SIZE(collection) function returns the number of elements in a specified collection. For example: SIZE(c.languages) is evaluated to the number ... ("English", "French"); // SIZE(collection) Expression<Integer> size = cb.size(languages);
18

Shared (L2) Entity Cache

Configuration The shared cache size is specified in the ObjectDB configuration:     <cache ... level2="0mb" /> The level2 attribute determines the size of the EntityManagerFactory's shared cache. The default size, 0, indicates that the cache is disabled. To enable the cache a positive value
16

WHERE clause (JPQL / Criteria API)

The following query retrieves only countries with a population size above a population size p: SELECT c ... them to the SELECT clause. For example, the following query retrieves all the countries with population size
1

[ODB1] Chapter 7 - JDOQL Queries

objects can be obtained using the size() method: int count = result.size(); Iteration ... >= 18"); query.setOrdering("age descending, children.size() ascending"); Collection result = (Collection)query.execute(); The primary ordering is age and the secondary ordering is children.size

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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