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122

Database(*.odb) file size on disk

Hello, we have questions about the file size of ObjectDB database on disk. Can you tell us something about how the deleting of entities affects the size of *.odb files on disk? -Will the released ... size. import java.util.ArrayList; import java.util.List; import javax.persistence.Basic
122

ObjectDB size not reducing

and the size does not decrease. In fact it keeps growing as records decrease. Is that supposed to happen ... file are marked as free, and can be reused later when new objects are persisted. However, the size ... the size of a database is to use the Doctor utility, creating a new (smaller) copy of an existing database
121

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
121

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
119

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
119

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
23

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
17

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
15

GROUP BY and HAVING clauses

their currency, and for each group returns the currency and the cumulative population size in countries ... , for which the cumulative population size and the average population size is then calculated. Any JPQL query
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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