Available memory for a Xojo app on Win7?

General
1

Hi all,

what is the memory available for a Xojo app on Win7? 2 GB (IMAGE_FILE_LARGE_ADDRESS_AWARE cleared) or 4 GB (IMAGE_FILE_LARGE_ADDRESS_AWARE set)?

I have an app on my Mac which after processing 68,000 proteins into peptides (using an in-memory database) goes to 2.7 GB. But what are the limits on Windows?

TiA

Markus

2

A 32 bit app’s MAX is of course 4Gb in total - but thats for EVERYTHING
Memory mapped I/O usually takes a chunk of that

http://msdn.microsoft.com/en-us/library/windows/desktop/bb613473(v=vs.85).aspx
http://msdn.microsoft.com/en-us/library/windows/desktop/aa366796(v=vs.85).aspx
http://msdn.microsoft.com/en-us/library/windows/desktop/aa366778(v=vs.85).aspx

3

I did a image stitcher(not Xojo but 32 bit) and the limit was 4GB on Win7 or 8 earlier versions are 2GB for Vista or XP, 3gb if the user had done the switch
The stitcher can handle images bigger than 1000x1000 split by 10x10 no problem

4

[quote=131747:@Markus Winter]Hi all,

what is the memory available for a Xojo app on Win7? 2 GB (IMAGE_FILE_LARGE_ADDRESS_AWARE cleared) or 4 GB (IMAGE_FILE_LARGE_ADDRESS_AWARE set)?

I have an app on my Mac which after processing 68,000 proteins into peptides (using an in-memory database) goes to 2.7 GB. But what are the limits on Windows?
[/quote]

From what I can see on my PC in Task Manager with 4GB memory and no virtual memory, with Xojo IDE and Chrome running, apps and all sorts of startup programs take 58% of the 4GB.

5

normally Xojo can use about 1.9 GB on Windows.
(as far as I remember)

Rest is for system things.

6

[quote=131771:@Christian Schmitz]normally Xojo can use about 1.9 GB on Windows.
(as far as I remember)

Rest is for system things.[/quote]

Actually, when a Xojo app is the only one running, Task Manager reports 49% memory used. And the app of mine I used to see that takes only 7.7 MB. The Xojo IDE takes 288 MB.

7

if you make test app which allocates memory blocks quickly, you will see that with 10 MB blocks, you get to 3.23 GB on Mac vs. 1.54 GB on Windows.

8

Windows definitely uses memory in a process differently that OS X
This is instructive though
http://duartes.org/gustavo/blog/post/anatomy-of-a-program-in-memory/