undersubscription

/AH1 N D ER0 S AH0 B S K R IH1 P SH AH0 N/
noun
  1. 1

    The subscription of significantly less than is available.

  2. 2

    (computing) The employment of more ports or bandwidth than necessary to ensure that network communication does not face delays.

  3. 3

    (computing) The failure to provide sufficient threads in a multithreaded application.