Some applications may experience problems loading the JVM required for the SQL engine because the process exceeds the available heap space. If your application experiences problems loading the JVM, you can configure the Salesforce driver to operate in server mode.

By default, the Salesforce driver operates in direct mode, with the SQL engine and JVM running in a single 32-bit process within the same JVM. In server mode, the driver's SQL engine runs in a separate 32-bit process with its own JVM instead of trying to load the SQL engine and JVM in the same process used by the driver.