Problem with network statistics reported by sysstat
Issue
The net statistics reported by the sar application
are wrong, more than twice the real traffic.
You can see in the following copy-n-paste the
big difference between the statistic reported from sysstat in the RPM repository:
Average: IFACE rxpck/s txpck/s
Average: bond0 11342.37 16948.02
and the statistics reported by sysstat compiled from sources:
Average: IFACE rxpck/s txpck/s
Average: bond0 4028.37 6008.39
The averages obtained by the second sysstat is confirmed
also by the switch counters and by ifconfig with the following
commands:
# ifconfig bond0 | egrep -o 'RX packets:[0-9]+'
# sleep 5
# ifconfig bond0 | egrep -o 'RX packets:[0-9]+'
RX packets:16831578535
RX packets:16831599072
that produce this result: (16831599072-16831578535)/5 = 4107
Environment
- Red Hat Enterprise Linux 6
- sysstat
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