Vijay Adik vadik@us - IBM
Vijay Adik vadik@us - IBM
Vijay Adik vadik@us - IBM
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<strong>IBM</strong> Advanced Technical Support - Americas<br />
Additional Network (no) Parameters for RAC:<br />
� Set udp_sendspace = db_block_size *<br />
db_file_multiblock_read_count<br />
(not less than 65536)<br />
� Set udp_recvspace = 10 * udp_sendspace<br />
– Must be < sb_max<br />
� Increase if buffer overflows occur<br />
� Ipqmaxlen=512 for GPFS environments<br />
� Use Jumbo Frames if supported at the switch layer<br />
Examples:<br />
� no -a |grep udp_sendspace<br />
� no –o -p udp_sendspace=65536<br />
� netstat -s |grep "socket buffer overflows"<br />
© 2009 <strong>IBM</strong> Corporation<br />
April 17, 2009
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