Dkfilter's children consuming 125 Mb memory

[Aldert]

Hi all,

Very simple and short question. After I followed the howto on domainkeys and did some googling I managed to get it working. But now when I do top and sort it by % of memory usage there are 6 dkfilter.in and 6 dkfilter.out children. Summing the percentages gives a usage of about 30%, equivallent to about 125 megs of my RAM!

How to reduce the usage? Why should there be 6 children alive? How to reduce it to like 1 or 2? There is not many mail coming in, so that much children are not needed?

(this issue has not been, well, issued before)

TIA and B/R from the 'windy' Netherlands,
Aldert Berends

[falko]

Is the number ofchildren set somewhere in your dkfilter init script (or the scripts included in there)?

[Aldert]

Hello Falko!

Hmm, none that I can see of:
case "$1" in
start-in)
echo -n "Starting inbound DomainKeys-filter (dkfilter.in)..."

# create directory for pid files if necessary
test -d $PIDDIR || mkdir -p $PIDDIR || exit 1

# start the filter
$DKFILTER_IN_BIN $DKFILTER_COMMON_ARGS --pidfile=$DKFILTER_IN_PID $DKFILTER_IN_ARGS
RETVAL=$?
if [ $RETVAL -eq 0 ]; then
echo done.
else
echo failed.
exit $RETVAL
fi
;;
dkfilter.in does not say to start more children, so far I can see.

I currently have no knowledge on C++ and moreover not on apache's variables and parameters...

[falko]

Can you post the full init script?

[Aldert]

#!/bin/sh
#
# Copyright (c) 2005-2006 Messiah College.
#
### BEGIN INIT INFO
# Default-Start: 3 4 5
# Default-Stop: 0 1 2 6
# Description: Runs dkfilter
### END INIT INFO

DKFILTERUSER=dkfilter
DKFILTERGROUP=dkfilter
DKFILTERDIR=/usr/local/dkfilter

HOSTNAME=`hostname -f`
DOMAIN=aerotronic.nl
DKFILTER_IN_ARGS="
--hostname=$HOSTNAME
127.0.0.1:10025 127.0.0.1:10026"
DKFILTER_OUT_ARGS="
--keyfile=$DKFILTERDIR/private.key
--selector=m1
--domain=aerotronic.nl,aerotronicvds.jronline.nl
--method=nofws
--headers
127.0.0.1:10027 127.0.0.1:10028"

DKFILTER_COMMON_ARGS="
--user=$DKFILTERUSER
--group=$DKFILTERGROUP
--daemonize"

DKFILTER_IN_BIN="$DKFILTERDIR/bin/dkfilter.in"
DKFILTER_OUT_BIN="$DKFILTERDIR/bin/dkfilter.out"

PIDDIR=$DKFILTERDIR/var/run
DKFILTER_IN_PID=$PIDDIR/dkfilter_in.pid
DKFILTER_OUT_PID=$PIDDIR/dkfilter_out.pid

case "$1" in
start-in)
echo -n "Starting inbound DomainKeys-filter (dkfilter.in)..."

# create directory for pid files if necessary
test -d $PIDDIR || mkdir -p $PIDDIR || exit 1

# start the filter
$DKFILTER_IN_BIN $DKFILTER_COMMON_ARGS --pidfile=$DKFILTER_IN_PID $DKFILTER_IN_ARGS
RETVAL=$?
if [ $RETVAL -eq 0 ]; then
echo done.
else
echo failed.
exit $RETVAL
fi
;;

start-out)
echo -n "Starting outbound DomainKeys-filter (dkfilter.out)..."

# create directory for pid files if necessary
test -d $PIDDIR || mkdir -p $PIDDIR || exit 1

# start the filter
$DKFILTER_OUT_BIN $DKFILTER_COMMON_ARGS --pidfile=$DKFILTER_OUT_PID $DKFILTER_OUT_ARGS
RETVAL=$?
if [ $RETVAL -eq 0 ]; then
echo done.
else
echo failed.
exit $RETVAL
fi
;;

stop-in)
echo -n "Shutting down inbound DomainKeys-filter (dkfilter.in)..."
if [ -f $DKFILTER_IN_PID ]; then
kill `cat $DKFILTER_IN_PID` && rm -f $DKFILTER_IN_PID
RETVAL=$?
[ $RETVAL -eq 0 ] && echo done. || echo failed.
exit $RETVAL
else
echo not running.
fi
;;
stop-out)
echo -n "Shutting down outbound DomainKeys-filter (dkfilter.out)..."
if [ -f $DKFILTER_OUT_PID ]; then
kill `cat $DKFILTER_OUT_PID` && rm -f $DKFILTER_OUT_PID
RETVAL=$?
[ $RETVAL -eq 0 ] && echo done. || echo failed.
exit $RETVAL
else
echo not running.
fi
;;
start)
$0 start-in && $0 start-out || exit $?
;;
stop)
$0 stop-in && $0 stop-out || exit $?
;;
restart)
$0 stop && $0 start || exit $?
;;
status)
echo -n "dkfilter.in..."
if [ -f $DKFILTER_IN_PID ]; then
pid=`cat $DKFILTER_IN_PID`
if ps -ef |grep -v grep |grep -q "$pid"; then
echo " running (pid=$pid)"
else
echo " stopped (pid=$pid not found)"
fi
else
echo " stopped"
fi
echo -n "dkfilter.out..."
if [ -f $DKFILTER_OUT_PID ]; then
pid=`cat $DKFILTER_OUT_PID`
if ps -ef |grep -v grep |grep -q "$pid"; then
echo " running (pid=$pid)"
else
echo " stopped (pid=$pid not found)"
fi
else
echo " stopped"
fi
;;
*)
echo "Usage: $0 {start|stop|restart|status}"
exit 1
;;
esac


Thanks for your time!

[falko]

Hm, there's no indication why it starts six children for dkfilter.in and another six for dkfilter.out... :(

[Aldert]

Indeed. Well, just a printscreen with the output of top a certain time:

http://aerotronic.nl/images/fora/dkfilterChildren.png

After the following:
-bash-3.00# /etc/init.d/dkfilter status
dkfilter.in... running (pid=2584)
dkfilter.out... running (pid=2593)
-bash-3.00# /etc/init.d/dkfilter stop
Shutting down inbound DomainKeys-filter (dkfilter.in)...done.
Shutting down outbound DomainKeys-filter (dkfilter.out)...done.
-bash-3.00# /etc/init.d/dkfilter start
Starting inbound DomainKeys-filter (dkfilter.in)...running
done.
Starting outbound DomainKeys-filter (dkfilter.out)...running
done.
Still 6 children, with new pids of course. May be it is a good idea ask the designer to take a look at it?

[falko]

May be it is a good idea ask the designer to take a look at it?
Yes, I think he can explain it. :)