root / plugins / network / tcp-retransmissions @ 047358a0
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#!/bin/sh |
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# tcp_retries revision 2 (Feb 2012) |
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# |
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# TCP retransmission rate. Useful for network debugging. |
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# |
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# Required privileges: none |
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# |
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# OS: Linux with procfs |
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# |
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# Author: Artem Sheremet <dot.doom@gmail.com> |
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# |
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#%# family=auto |
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#%# capabilities=autoconf |
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TCPSTAT=/proc/net/tcp |
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case $1 in |
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autoconf) |
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[ -r $TCPSTAT -o -r ${TCPSTAT}6 ] && echo "yes" || echo "no"
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;; |
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config) |
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cat <<CONFIG |
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graph_title TCP retransmissions |
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graph_vlabel Rate, retrs/sockets |
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graph_category network |
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graph_info TCP sockets retransmission counters from $TCPSTAT |
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rate.label Retransmission rate |
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rate.draw LINE2 |
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rate.min 0 |
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CONFIG |
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;; |
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esac |
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cat /proc/net/tcp* | awk ' |
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{
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TOTAL += $7; |
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COUNT++; |
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} |
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END {
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printf "rate.value %.3f\n", TOTAL/COUNT |
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} |
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' |