Experimental Physics and
Industrial Control System

Frank Lenkszus <[email protected]> · Thu, 18 Mar 1999 06:07:37 -0600 (CST)

Your ioc is probably either out of memory or mbufs. Use memShow to check on
memory  usage and mbufShow to check on mbuf usage. As far as mbufs go, on our
iocs the max is 1500. If "number of mbufs:" = 1500 and/or "number of times
 drained protocols for space:" is  greater than 0 you're probably out of mbufs.
 This happens to us on an  ioc. We believe that workstation processes post
 monitors on PVs but then never service them. Buffers on the workstation fill to
 a system maximum, then mbufs on the ioc are allocated and filled to the
 1500 max. We can identify the workstations involved, have not been able to
 associate a socket with a process to figure out what process(es) are involved
 (on the workstation). The only way arround the out of mbufs problem is to
 either reboot the workstation(s) or the ioc. We reboot the ioc.

 Frank

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System