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limits
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# System resource limits
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sysctl -a | egrep "nmbcluster|mbuf"
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# to see free mbuf
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netstat.nn vr1
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# netstat + awk == shows network bandwidth in Mbyte/sec
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netstat -s
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# lots of info
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netstat -s | grep dropped
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# reason for dropped packets
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netstat -i
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# collisions, errors
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netstat -m
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# to see mbuf
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netstat -bdhI vr1 1
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# drop packets, collisions, errors
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netstat -na
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systat -vmstat 1
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# BSD summary of system statistics (1 s intervals)
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systat -tcp 1
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# BSD tcp connections
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systat -netstat 1
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# BSD active network connections
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systat -ifstat 1
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# BSD network traffic through active interfaces
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systat -iostat 1
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# BSD CPU and and disk throughput
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systat -ip
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# bar graph
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vmstat 2
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# display virtual memory statistics
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vmstat -z
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# lots of info
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vmstat -z | egrep "ITEM|mbuf"
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# shows free mbuff
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vmstat -m
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# memory usage
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vmstat -i
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# check interrupts
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procstat -at | grep em\[01\]
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mpstat 1
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# display processors related statistics
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iostat 2
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# display I/O statistics (2 s intervals)
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bmon
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# Transmit and Receive ascii graph
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cnd
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ifstat
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# like netstat ( tx and rx )
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nload devices vr1
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# ascii bar graph ( tx and rx )
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slurm -i vr1
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# ascii bar graph ( tx and rx )
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tcpstat -i vr1
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# epochtime vs total bytes
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trafshow
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# show by protocols src/dst
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