dynamically release ZFS cache?

 I have a server that is struggling with lack of contiguous memory:

 

Jul 16 09:29:41 needhelp  Cannot alloc contig buf for I/O for 4194304 blk size

Jul 16 09:29:41 needhelp scsi: WARNING: /pci@3,0/pci1022,7458@a/pci1077,140@1/fp@0,0/tape@w500110a0008ca5e0,0 (st0):

 

echo "::memstat"| mdb -k

Page Summary                Pages                MB  %Tot

------------     ----------------  ----------------  ----

Kernel                     732298              2860   18%

ZFS File Data             2466243              9633   60%

Anon                       428606              1674   10%

Exec and libs               30319               118    1%

Page cache                 186925               730    5%

Free (cachelist)             4569                17    0%

Free (freelist)            294025              1148    7%

 

Total                     4142985             16183

Physical                  4054870             15839

 

Is there a way to dynamically release some of the ZFS cache?

 

$uname -a

SunOS beaker 5.10 Generic_142910-17 i86pc i386 i86pc

 

cat /etc/release

                        Solaris 10 5/09 s10x_u7wos_08 X86