206IBM TotalStorage DS6000 Series: Performance Monitoring and Tuning
Remember, sa2 will remove the data collection files over a week old as scheduled in cron.
You can save sar info to view later with the commands:
sar -A -o data.file interval count > /dev/null & [SAR data saved to data.file]
sar -f data.file [Read SAR info back from saved file:]
All data is captured in binary form and saved to a file (data.file). The data can then be
selectively displayed with the sar command using the -f option.
sar summary
sar helps to tell quickly if a system is I/O bound. Remember though, that a busy system can
mask I/O issues since io_wait counters are not increased ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month, and much more.