rpool size increase to 96% and hang

rpool size increase to 96%

I have primary domain controller with 5 guest ldoms.

in the primary domain controller the rpool size shoots up to 96% then i reduce the dump size from 64Gb to 32Gb..then I feel relax that I freed some space.. after two days again the rpool size shoots up..

root@mdctestdbctrl:/# zpool list

NAME   SIZE  ALLOC   FREE  CAP  DEDUP  HEALTH  ALTROOT

rpool  556G   534G  22.1G  96%  1.00x  ONLINE  -

root@mdctestdbctrl:/# zfs list

NAME                             USED  AVAIL  REFER  MOUNTPOINT

rpool                            535G  12.3G  76.5K  /rpool

rpool/ROOT                      4.75G  12.3G    31K  legacy

rpool/ROOT/solaris-1            4.75G  12.3G  3.99G  /

rpool/ROOT/solaris-1/var         776M  12.3G   776M  /var