Andrej Koelewijn

Just found this page describing how to create a really small oracle database. I wasn’t able to make my database as small as his, my total SGA is still 30Mb, he’s down to 26Mb.

Unfortunately, my first postings on jdeveloper 10g have mostly discussed it’s memory usage. That’s a bit unfair, as it is a nice IDE. I’ve installed it on another laptop, with 512Mb. My previous laptop had 384Mb and a lot of company installed management software. On this new clean laptop, jdeveloper runs ok. No big memory issues. Ok, it still uses around 200Mb, but it is very useable. I can run Jdeveloper, OC4J (oracle’s j2ee server), and oracle 9i r2 at the sametime.

I’ve installed Oracle 9iR2 (the database), created a default database, and changed the memory settings (block buffers low, no java pool, etc). It now uses 80Mb. Is this as small as it gets, or is it possible to configure it to use even less memory?

Dion informed me about the fact that poseidon 2.0.1 is available. The registration problems have gone. And resizing and moving objects also seems to have been improved…

The guys that created javacertificate.com have create a new certification center, j2eecertificate.com, where you can practice for the scwcd exam. I really like javacertificate.com, i think it’s a good tool to practice for the exam. One day, when i have the time, i’ll take the exam, but right now i really need my time to learn new things.

I just downloaded poseidon 2.0. I needed to draw some UML diagrams for a presentation, and noticed that the new version was available for download. The poseidon website has also been renewed. After using the new version for an hour i’m not sure if it’s production quality. I’m having problems with the registration process, the registration window doesn’t really want to go away, and the key window shows about 10 registration keys. Also the automatic registration, using Apache Axis, doesn’ t work, so i had to you their website to get a key.
The diagrams have improved, the fonts are now anti-aliased, which is nice if you want to use them in a presentation. I had some problems with selected items, which i couldn’t deselect. And i also had a problem with deleting a diagram. Nothing major, it’s usuable, but i hope they release version 2.0.1 soon.

Some more problems i encountered: – Resizing objects doesn’t work very well, you can drag a corner point but the object doesn’t resize – Moving objects sometimes doesn’t work.

Mm, the list keeps growing: – At one point i couldn’t draw any associations between objects in the deployment diagrams anymore, – and finally the deployment diagram started scrolling without stopping, so i had to end the program…

Let’s hope these issues are solved soon.

My laptop doesn’t have a lot of memory. Only 384Mb. This means that I can’t run JDeveloper and Oracle RDBMS at the same time. So i installed postgresql (on windows 2000). With this setup i tried to follow some of the examples published on OTN. It seems that business components and postgresql don’t really work well together. Some parse errors, and I can’t create tables from the entity objects. The string attributes are translated to varchar2 columns.
BTW, you really need memory, I’m using 590Mb right now, running postgresql, mozilla, and jdeveloper. No application server running…

So we can expect a lot of Oracle news this week. I already downloaded JDeveloper 10G, hopefully I can find some time this week to try it. eWeek has an article about HTML DB. Sound like WebDB when you read it. It should enable small development teams to quickly put data on a web page, without having to use a complex application server.

The developer preview of JDeveloper 10G will be available on september 5th according to OTN. And the developer previews of OC4J 10G and TopLink 10G are available for download. You may want to wait untill september 5th before downloading, as JDeveloper should include both.

But the real date is summer 2004: the production release of OC4J 10G isn’t expected untill the summer of 2004.