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Add some simple support and documentation for using process-specific oom_adj

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settings to prevent the postmaster from being OOM-killed on Linux systems.

Alex Hunsaker and Tom Lane
This commit is contained in:
Tom Lane
2010-01-11 18:39:32 +00:00
parent 292176a118
commit d5e0029862
3 changed files with 74 additions and 9 deletions
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12
contrib/start-scripts/linux
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@ -24,7 +24,7 @@
# Original author: Ryan Kirkpatrick <pgsql@rkirkpat.net>
# $PostgreSQL: pgsql/contrib/start-scripts/linux,v 1.9 2009/08/27 16:59:38 tgl Exp $
# $PostgreSQL: pgsql/contrib/start-scripts/linux,v 1.10 2010/01/11 18:39:32 tgl Exp $
## EDIT FROM HERE
@ -40,6 +40,14 @@ PGUSER=postgres
# Where to keep a log file
PGLOG="$PGDATA/serverlog"
# It's often a good idea to protect the postmaster from being killed by the
# OOM killer (which will tend to preferentially kill the postmaster because
# of the way it accounts for shared memory). Setting the OOM_ADJ value to
# -17 will disable OOM kill altogether. If you enable this, you probably want
# to compile PostgreSQL with "-DLINUX_OOM_ADJ=0", so that individual backends
# can still be killed by the OOM killer.
#OOM_ADJ=-17
## STOP EDITING HERE
# The path that is to be used for the script
@ -62,6 +70,7 @@ test -x $DAEMON || exit 0
case $1 in
start)
echo -n "Starting PostgreSQL: "
test x"$OOM_ADJ" != x && echo "$OOM_ADJ" > /proc/self/oom_adj
su - $PGUSER -c "$DAEMON -D '$PGDATA' &" >>$PGLOG 2>&1
echo "ok"
;;
@ -73,6 +82,7 @@ case $1 in
restart)
echo -n "Restarting PostgreSQL: "
su - $PGUSER -c "$PGCTL stop -D '$PGDATA' -s -m fast -w"
test x"$OOM_ADJ" != x && echo "$OOM_ADJ" > /proc/self/oom_adj
su - $PGUSER -c "$DAEMON -D '$PGDATA' &" >>$PGLOG 2>&1
echo "ok"
;;