Veritas Storage Foundation™ for Oracle 5.0.1 Administrator's Guide

To obtain i/o statistics
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Use the odmstat command as follows:
# /opt/VRTS/bin/odmstat -i 5 /mnt/odmfile*
For example:
# /opt/VRTS/bin/odmstat -i 5 /db/odmfile*
OPERATIONS FILE BLOCKS AVG TIME(ms)
FILE NAME READ WRITE READ WRITE READ WRITE
Mon May 11 16:21:10 2015
/db/cust.dbf 0 0 0 0 0.0 0.0
/db/system.dbf 0 0 0 0 0.0 0.0
Mon May 11 16:21:15 2015
/db/cust.dbf 371 0 371 0 0.2 0.0
/db/system.dbf 0 371 0 371 0.0 5.7
Mon May 11 16:21:20 2015
/db/cust.dbf 813 0 813 0 0.3 0.0
/db/system.dbf 0 813 0 813 0.0 5.5
Mon May 11 16:21:25 2015
/db/cust.dbf 816 0 816 0 0.3 0.0
/db/system.dbf 0 816 0 816 0.0 5.3
Mon May 11 16:21:30 2015
/db/cust.dbf 0 0 0 0 0.0 0.0
/db/system.dbf 0 0 0 0 0.0 0.0
About I/O statistics
When running your database through the file system, the read-write lock on each
file allows only one active write per file. When you look at the disk statistics using
iostat, the disk reports queueing time and service time. The service time is the
311Tuning for performance
About tuning VxFS