How to increase java heap memory in a dll?

I am downloading a big amount of information from a database, using this code:

conn = database(odbc,'','');

strsql = "whatever"

curs = exec(conn,strsql);

It only works after increasing the Java Heap Memory in the MATLAB General Preferences. This is ok if I run the code in my computer, but the problem is that I need to generate a dll to download the information from other computers that do not have matlab. The dll is running an out of Java Memory Problem. What can I do?

Thank you in advance.

Answer 1

[Jan]

I cannot check it with a compiled application. But inside Matlab you can hack the preferences file. At first check the current heap size:

heapSize = java.lang.Runtime.getRuntime.maxMemory;

If the heap size is too small, set a new value:

com.mathworks.services.Prefs.setIntegerPref('JavaMemHeapMax', 2048); % MB

and restart the program. This works with restarting Matlab, e.g. by

system('matlab')
quit;

But I have no idea hoe to restart the DLL.

See also https://www.mathworks.com/matlabcentral/answers/108738-how-do-i-increase-java-heap-size-to-greater-than-4-gb#answer_134142

Answer 2

[Alicia Camara Roldan]

Thank you for your answer.

That's what I did with the preferences, and it worked inside Matlab, but not with the compiled application.