My /var/log/messages file is filling up every hour or so as tonnes of messages are being dropped into it from the multipath daemon.
The messages just loop over and over again for each SAN disk.
Any idea what's causing this and/or how to fix it?

Apr 13 12:43:51 ssrxprddb4 multipathd: sdbx: state = running
Apr 13 12:43:51 ssrxprddb4 multipathd: sdbx: state = 3
Apr 13 12:43:51 ssrxprddb4 multipathd: sdbx: mask = 0x8
Apr 13 12:43:51 ssrxprddb4 multipathd: sdbx: state = running
Apr 13 12:43:51 ssrxprddb4 multipathd: sdbx: emc prio = 1
Apr 13 12:43:51 ssrxprddb4 multipathd: sdcd: get_state
Apr 13 12:43:51 ssrxprddb4 multipathd: sdcd: state = running
Apr 13 12:43:51 ssrxprddb4 multipathd: sdcd: state = 3
Apr 13 12:43:51 ssrxprddb4 multipathd: sdcd: mask = 0x8
Apr 13 12:43:51 ssrxprddb4 multipathd: sdcd: state = running
Apr 13 12:43:51 ssrxprddb4 multipathd: sdcd: emc prio = 1

It is possible you've set verbosity to a high level in /etc/multipath.conf?

From man page:

1 members found this post helpful.

Yes, that is the problem. I changed the polling_interval and verbosity and restarted multipathd and the messages stopped.
Thanks

1 members found this post helpful.

Glad I could help.