Update: I have run extensive tests of Diafaan SMS Server 2.1 with MySQL (MySQL ODBC 5.1) on a Windows XP PC with very little memory but I have not been able to replicate the problem. When sending a large number of messages (more than 200000) at the same time it was possible to trigger Windows to increase the virtual memory but after sending all the messages the virtual memory use decreased to normal stable values. On a PC with 1GB of RAM with Windows XP I never encountered virtual memory problems.
It is possible that the MySQL ODBC driver you used has a memory leak and old versions of the .NET framework may also cause memory leaks. It is always recommended to use a fully patched PC with the latest version of .NET framework 3.5 with a stable and patched version of the ODBC driver for your database. Also, check the event log in Diafaan SMS Server for possible problems with the database driver or other components, this might also give an indication of memory leak problems.
These kind of memory problems are often difficult to pinpoint because it can depend on your exact configuration. I will set up a Windows XP system with MySQL to see if I can replicate the memory loss.
Can you send your Diafaan SMS Server configuration file (File-Export-Configuration) and the Event log (File-Export-Event log) to firstname.lastname@example.org? The configuration file can help me to replicate your settings as precise as possible, and the event log might give me indications of possible problems.
Diafaan Lite 2.10 on WinXP 32 bit, MySql 5.1.6, MysQlOdbc conn. 3.51.
Works good (sends messages when asked) but it constantly increases its *virtual* memory usage (about 120kb/sec) so that after few weeks Windows start complaining about too low free virtual memory.
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