The following entries should be added to the /etc/system file of each of Oracle SPARC SuperCluster node:
set rpcmod:clnt_max_conns = 8 set nfs:nfs3_bsize = 131072
Additionally, the following commands need to be run on each Oracle SPARC SuperCluster node every time it is rebooted:
/usr/sbin/ndd -set /dev/tcp tcp_max_buf 2097152 /usr/sbin/ndd -set /dev/tcp tcp_xmit_hiwat 1048576 /usr/sbin/ndd -set /dev/tcp tcp_recv_hiwat 1048576
Additional tuning might be necessary to achieve optimal performance. Refer to Oracle SPARC SuperCluster Tunables document 1474401.1, available at http://support.oracle.com, for the latest information. Also, the January 2013 QFSDP release added a "ssctuner" tool that automatically sets tunables. Refer to the Oracle SPARC SuperCluster release notes for additional information.