title: SQL Server hang and then restart after preemptive_com_getadate wait type
body: <p>We are facing issue on the SQL Server , SQL Server fetching data from Oracle 12c through linked server but at the time of fetching data from oracle then we receive preemptive_com_getdata wait type then sql server consume all available physical RAM and then hang and then restart</p>
  
  <p>What is the cause of this ?</p>