We are not using VxFS.
In /var/log/messages we found nothing important. only below lines were keep on repeating.
Jan 19 13:18:12 UKGBDCESRPL048 sudo: esrsve : TTY=unknown ; PWD=/opt/esrsve/connectivityreport ; USER=root ; COMMAND=/sbin/service esrskeepalive status
Jan 19 13:19:12 UKGBDCESRPL048 sudo: esrsve : TTY=unknown ; PWD=/opt/esrsve/connectivityreport ; USER=root ; COMMAND=/sbin/service esrskeepalive status
Jan 19 13:20:12 UKGBDCESRPL048 sudo: esrsve : TTY=unknown ; PWD=/opt/esrsve/connectivityreport ; USER=root ; COMMAND=/sbin/service esrskeepalive status
Jan 19 13:21:12 UKGBDCESRPL048 sudo: esrsve : TTY=unknown ; PWD=/opt/esrsve/connectivityreport ; USER=root ; COMMAND=/sbin/service esrskeepalive status
Jan 19 13:21:45 UKGBDCESRPL048 syslog-ng[1429]: Log statistics; dropped='pipe(/dev/xconsole)=0', dropped='pipe(/dev/tty10)=0', processed='center(queued)=37922', processed='center(received)=19745', processed='destination(messages)=1609', processed='destination(mailinfo)=18006', processed='destination(mailwarn)=62', processed='destination(localmessages)=0', processed='destination(mailerr)=0', processed='destination(warn)=76', processed='destination(netmgm)=0', processed='destination(cron)=5', processed='destination(console)=14', processed='destination(mail)=18068', processed='destination(null)=0', processed='destination(xconsole)=14', processed='destination(firewall)=68', processed='destination(acpid)=0', processed='source(src)=19745'
Jan 19 13:22:12 UKGBDCESRPL048 sudo: esrsve : TTY=unknown ; PWD=/opt/esrsve/connectivityreport ; USER=root ; COMMAND=/sbin/service esrskeepalive status
Jan 19 13:23:12 UKGBDCESRPL048 sudo: esrsve : TTY=unknown ; PWD=/opt/esrsve/connectivityreport ; USER=root ; COMMAND=/sbin/service esrskeepalive status
Jan 19 13:24:12 UKGBDCESRPL048 sudo: esrsve : TTY=unknown ; PWD=/opt/esrsve/connectivityreport ; USER=root ; COMMAND=/sbin/service esrskeepalive status
Jan 19 13:25:12 UKGBDCESRPL048 sudo: esrsve : TTY=unknown ; PWD=/opt/esrsve/connectivityreport ; USER=root ; COMMAND=/sbin/service esrskeepalive status
Jan 19 13:26:12 UKGBDCESRPL048 sudo: esrsve : TTY=unknown ; PWD=/opt/esrsve/connectivityreport ; USER=root ; COMMAND=/sbin/service esrskeepalive status
Jan 19 13:27:12 UKGBDCESRPL048 sudo: esrsve : TTY=unknown ; PWD=/opt/esrsve/connectivityreport ; USER=root ; COMMAND=/sbin/service esrskeepalive status