work process

In our production system, Work process exceeds that time limit and the space getting occupied in the file system /usr/sap/WIP.And finally system gets halt for few minutes.(But we had set the workprocess time limit to 600).

using AIX 5.3 OS and SAP ECC 6.0

SAP_ABA 700 0015 SAPKA70015 Cross-Application Component

SAP_BASIS700 0015 SAPKB70015 SAP Basis Component

Database system ORACLE

Release 10.2.0.2.0

Kernel release 700

pl give some suggestions.