It seems the using the SQLSRV driver on apache on win2k8 server is causing time outs.
I am unable to run the function DB unit tests to completion due to this error.

Fatal error: Maximum execution time of 30 seconds exceeded in C:\server\workspace\mssql\lib\dml\sqlsrv_native_moodle_database.php on line 1330 (integration.git/master, for moodle.git/master its 'on line 1328' atm)

the query seems to be

...

        $sql = "BEGIN

                    DECLARE @result INT

                    EXECUTE @result = sp_getapplock @Resource='$fullname',

                                                    @LockMode='Exclusive',

                                                    @LockOwner='Session',

                                                    @LockTimeout='$timeoutmilli'

                    SELECT @result

                END";

after this error, any other moodle page is timing out as well.