very slow write performance on ZFS
SPARC Solaris 10 1/13 with Oracle V12 database . 9000+ ms write time for Oracle datafiles ( seen using Dtrace , but only every 10 minutes = whenever we do a log switch . We have an SR open but I need to get some different views as I think its just blocked on trying to flush the data down to the datafiles
zfsslower.d reporting the above write times.
How can I probe deeper here ? Write cache disabled on all the disks and has been for ages