Howto start mongod as daemon on NUMA machine?
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Baurzhan Taishinov
Jul 26, 2011, 5:34:28 AM7/26/11
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I installed mongodb on debian squeeze from 10gen repository.
When started mondod writes to log
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** WARNING: You are running on a NUMA machine.
** We suggest launching mongod like this to avoid performance problems:
** numactl --interleave=all mongod [other options]
Howto change init script to start daemon with numactl?
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Scott Hernandez
Jul 26, 2011, 7:18:41 AM7/26/11
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Change the init.d script or upstart job to use numactl as described
below instead of mongod as the startup process.
below instead of mongod as the startup process.
2011/7/26 Baurzhan Taishinov <baur...@gmail.com>:
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Baurzhan Taishinov
Jul 26, 2011, 9:06:29 AM7/26/11
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In debian init script uses start-stop-daemon tool to start daemon. Howto change this
to use numactl --interleave=all?
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DAEMON=/usr/bin/mongod
start_server() {
# Start the process using the wrapper
start-stop-daemon --background --start --quiet --pidfile $PIDFILE \
--make-pidfile --chuid $DAEMONUSER \
--exec $DAEMON -- $DAEMON_OPTS
errcode=$?
return $errcode
}
2011/7/26 Scott Hernandez <scotthe...@gmail.com>
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Steffen
Jul 26, 2011, 11:39:27 AM7/26/11
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I did this in my Init script.
I added these lines in the start_server() function.
It's not perfect so I welcome for any suggestion.
..........
start_server() {
# check for numactl
NUMACTL=$(which numactl)
if [ -n "$NUMACTL" ]; then
DAEMON_OPTS="--interleave=all ${DAEMON} ${DAEMON_OPTS}"
DAEMON="$NUMACTL"
fi
# Start the process using the wrapper
...........
Regards,
Seffen
I added these lines in the start_server() function.
It's not perfect so I welcome for any suggestion.
..........
start_server() {
# check for numactl
NUMACTL=$(which numactl)
if [ -n "$NUMACTL" ]; then
DAEMON_OPTS="--interleave=all ${DAEMON} ${DAEMON_OPTS}"
DAEMON="$NUMACTL"
fi
# Start the process using the wrapper
Regards,
Seffen
Alexander Azarov
Jul 26, 2011, 11:43:27 AM7/26/11
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E.g.
/usr/bin/numactl --interleave=all -- \
/usr/bin/numactl --interleave=all -- \
Baurzhan Taishinov
Jul 27, 2011, 1:34:41 AM7/27/11
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This script not works:( I got an error
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start-stop-daemon: unrecognized option '--interleave=all'
Try 'start-stop-daemon --help' for more information.
failed!
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Baurzhan Taishinov
Jul 27, 2011, 1:44:12 AM7/27/11
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Sorry. Error caused by absence of numactl binary in my system. I need install numactl?--
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Alexander Azarov
Jul 27, 2011, 1:44:59 AM7/27/11
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Steffen, you will not be able to stop using "/etc/init.d/mongodb stop". There is nothing wrong in wrapping whole "start-stop-deamon" into "numactl", since "numactl" affects all the child hierarchy.
Steffen
Jul 27, 2011, 4:00:45 AM7/27/11
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Stop is working with my solution too, because numactl is transparent
for the mongod process.
Baurzhan Taishinov
Jul 27, 2011, 5:42:43 AM7/27/11
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Steffen thanks. It works. And /etc/init.d/mongodb stop works well.
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On Wed, Jul 27, 2011 at 11:44 AM, Alexander Azarov <aza...@aha.ru> wrote:
Steffen, you will not be able to stop using "/etc/init.d/mongodb stop". There is nothing wrong in wrapping whole "start-stop-deamon" into "numactl", since "numactl" affects all the child hierarchy.
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Alexander Azarov
Jul 27, 2011, 10:45:19 AM7/27/11
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Oh, my mistake then!
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mluggy
Feb 18, 2013, 2:23:47 AM2/18/13
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Actually I couldn't get it to work with the init.d script that comes out of the box (mongo 2.3.3 on debian 6). Got the same problem with start-stop-daemon. This seems to solve it: https://github.com/chipitsine/mongo/commit/f82aba3e0d459d17bee06577c479361fba9dfcd6
Alexander Azarov
Feb 18, 2013, 2:35:04 AM2/18/13
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Yup, there are at least two pull requests sent:
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