RTControl delete oldest one.

#!/bin/bash

CURRENT=$(rtcontrol -qosize \* | awk '{ SUM += $1} END { print SUM/1024/1024/1024 }')
MAXIMUM="1200"


while [ "$CURRENT" \> "$MAXIMUM" ]

do
    rtcontrol -/1 xfer=0 loaded=+7d prio!=3 -sloaded --cull --cron --yes
    sleep 15
    CURRENT=$(rtcontrol -qosize \* | awk '{ SUM += $1} END { print SUM/1024/1024/1024 }')
    echo $CURRENT
    sleep 15

done


exit