Device specifications

[CrisSS]

I would like to request that Nokia inform in Device Specification the following items:
*RAM available for Java aplications.
This item is very important for the Java developer, but the memories reported in Devices Specifications has nothing to do with Java.

For example:
My N97mini have 128MB RAM, but for Java has only 80KB.

This information "in general" become very confusing for the beginner developer.

Thanks for attention.

[wizard_hu_]

Well, if there is a limit, it is listed in "Memory Functions".
https://www.developer.nokia.com/Devi...ions/N97_mini/ says Unlimited, which means Java can use up as many memory as it finds. However it is normal that it can not use all the 128 megabytes, the OS and other running applications use memory too.

[CrisSS]

Then, the OS consume almost all RAM ?
What is the minimum consumption of RAM of Symbian OS v9.4 ?

[wizard_hu_]

The OS certainly does not consume all the RAM. How did you measure that 80 kB?

[CrisSS]

I load 8 images of 10KB each. Using: Image.createImage("image1.png")
After the images loaded I draw they so that the Garbage Colector not discard the images. I'am using GameCanvas for draw.
I'am using MIDP 2.0 and CLDC 1.1
With the emulator of Java in the third image I catch Out Of Memory Error. This is right because CLDC 1.1 have the minimun of 32KB of RAM.
With the emulator of Nokia N97mini the error hapen in the eighth image loaded.

Nokia does not tell how much RAM memory consumes Symbian OS ?

[wizard_hu_]

What is the resolution of your images?

[CrisSS]

Humm......
My image is 1080x 592..... Humm..... = 639.360 pixels.
The screen of N97mini is 24bit color depth.
Each pixel have 3byte... Hummm........ 3*639.360 = 1.918.080
Each image consume 1,91808 MB.... Hummmmmm..... 1.918.080 * 7(images) = 13.426.560
Hummmm..... my test consumed 13,4 MB..... Then the Symbian OS v9.4 consume more than 100MB of RAM.
Right ???

[wizard_hu_]

Considering that 3 posts ago your images were consuming 80 kb, 13+ megabytes is some kind of an increase. Also note that there are some chances for that the images are stored with 32-bit color mode in the memory. Obviously the OS does not consume 100 MB of RAM, however there are many other tasks are running all the time (for example the Phonebook application stays in the memory even if you exit from it, etc.).
Anyway, for checking the actual memory conditions, you can try Y-Tasks from http://drjukka.com/YTasks.html, the free version should be enough for it.

[CrisSS]

Using the YTask I discover the consume of RAM of Symbian OS v9.4 in my N97mini : 73MB
And the numbers calculated is right. The images consume a lot of memory.
Thanks wizard_hu !!!