Swap space strangeness

We have a T4-1, running Solaris 10 8/11 patched to 07/2012, which is showing some very strange swap entries.

With the three Oracle Databases down the df shows:

Filesystem             size   used  avail capacity  Mounted on
rpool/ROOT/s10s_u10wos_17b-082012
                       274G    13G   232G     6%    /
/devices                 0K     0K     0K     0%    /devices
ctfs                     0K     0K     0K     0%    /system/contract
proc                     0K     0K     0K     0%    /proc
mnttab                   0K     0K     0K     0%    /etc/mnttab
swap                   115G   384K   115G     1%    /etc/svc/volatile
objfs                    0K     0K     0K     0%    /system/object
sharefs                  0K     0K     0K     0%    /etc/dfs/sharetab
/platform/sun4v/lib/libc_psr/libc_psr_hwcap3.so.1
                       245G    13G   232G     6%    /platform/sun4v/lib/libc_psr.so.1