Hi. bash-3.00# uname -a SunOS XXXX 5.10 Generic_125101-04 i86pc i386 i86pc Server is x4100. NFS server under Sun Cluster with ZFS. I issued ''zpool import'' to see other pool available to import on one node and then I got very slow nfs access to that node, nfsd go upto ~3500 threads (from ~500) and load increased to few hundreds. I couldn''t stop ''zpool import'' - after 2-3 minutes it exited with no output (as ^C was send several times) and load immediately dropped to normal level. During ''zpool import'' it consumed entirely one CPU core and nfsd consumed all the rest. I did run for several seconds: bash-3.00# dtrace -n fbt:zfs::entry''/pid == 16919/{@[probefunc]=count();}'' dtrace: description ''fbt:zfs::entry'' matched 1085 probes ^C arc_buf_destroy 10289 arc_change_state 10289 zio_buf_free 10289 arc_evict 730332 bash-3.00# Server is running with zil_disable=1 ? This message posted from opensolaris.org