SAP DB2 10.1 SAPTOOLS tablespace growing rapidly

Hi

In our Production system running on HP-UX, DB2 10.1, tablespace SAPTOLLS growing rapidly, we have added the containers but the same get utlized in couple of days. before 1 month never this tablespace came into picture, this was happening from last 1 month. Kindly suggest what could be the possible reason.

Regards