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12

Performance problem

separate test environment its speed is very good. We did a performance analysis on our 2 linux servers ... , it seems that number of query results have large effect on speed, especially if we exceed certain
8

Index causes increased memory usage

Hello, In an effort to increase the speed of our queries with our embedded ObjectDB system, we configured our JDO file that defines our persistable objects with some unique String indices. While this improved query performance considerably, we have noted that our database application is consuming
8

TimeSeries and ObjectDB

. This could be efficient it terms of space and retrieval speed but may be more expansive in updates
8

Single Server License and Embedded Mode

would prefer to stick with embedded mode for the speed. Since we only have a single server that needs
8

Performance of "InsertTest"

You provided the "InsertTest" in the following post, and say "On Intel Core 2 Quad Q6600 (and enhancement) it persists 340,000 objects per second". Insertion Speed Rate and Batch Load Now, ten years later, I run it on Intel Core i5-5300U (2.3Ghz) with 8GB memory, output is 45000 per second
8

Selective merge/cascade of detatched entity

. It is ultimately the speed of these two use cases that will decide whether objectdb is worth the investment
8

ObjectDB Website and Yahoo Mail

. We will check what can be done with Yahoo, as well as with the occasional website speed issues. Thank
8

Strange behaviour with ORDER BY and IN

Hi, after trying out objectdb for a while now and being quite impressed by its speed and overall performance I noticed a strange behaviour where an ORDER BY - directive isn't executed as it should be (and usually is, except in this special combination-case). Ordering seems to be ignored if we order
8

How to check if an entity exists in a Database without loading it?

Hi, I am trying to speed up some code - where i check if an entity exists in order to make a decision. In Java - It looks like this (pk - is the primary key of the entity): MyClass find = em.find(MyClass.class, pk); boolean exists = find != null; Is there a way to check the existence
1

queries more than 10 times slower using 2.8.1 versus 2.7.6

of the speed compared to 2.7.6 hgzwicker Hans-Georg Zwicker Here is an analysis of query 1 of post #6

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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