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Dirty but simplest way to get a 95th percentile usage on a network interface
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#!/bin/bash | |
netdev=eth0 | |
storage=/tmp/95th_percentile_db | |
:> $storage | |
while true; do | |
rx_bytes_count1=$(awk "/${netdev}/ { print \$2 }" /proc/net/dev) | |
tx_bytes_count1=$(awk "/${netdev}/ { print \$10 }" /proc/net/dev) | |
sleep 5m | |
rx_bytes_count2=$(awk "/${netdev}/ { print \$2 }" /proc/net/dev) | |
tx_bytes_count2=$(awk "/${netdev}/ { print \$10 }" /proc/net/dev) | |
rx_Bps=$(( (rx_bytes_count2 - rx_bytes_count1) / 300 )) | |
tx_Bps=$(( (tx_bytes_count2 - tx_bytes_count1) / 300 )) | |
echo $(( rx_Bps + tx_Bps )) >> $storage | |
percentile95_index=$(( $(cat $storage | wc -l) * 95 / 100 )) | |
[ $percentile95_index -eq 0 ] && continue | |
percentile95_bps=$(( $(sort -n $storage | sed -n "${percentile95_index}p") * 8 )) | |
echo $percentile95_bps | numfmt --to=iec --suffix bps | |
done |
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