@@ -42,18 +42,17 @@ PGLOG="$PGDATA/serverlog"
4242
4343# It's often a good idea to protect the postmaster from being killed by the
4444# OOM killer (which will tend to preferentially kill the postmaster because
45- # of the way it accounts for shared memory). Setting the OOM_SCORE_ADJ value
46- # to -1000 will disable OOM kill altogether, which is a good thing for the
47- # postmaster, but not so much for individual backends. If you enable this,
48- # also uncomment the DAEMON_ENV line, which will instruct backends to set
49- # their OOM adjustments back to the default setting of zero.
50- # OOM_SCORE_ADJ=-1000
51- # DAEMON_ENV="PG_OOM_ADJUST_FILE=/proc/self/oom_score_adj"
45+ # of the way it accounts for shared memory). To do that, uncomment these
46+ # three lines:
47+ # PG_OOM_ADJUST_FILE=/proc/self/oom_score_adj
48+ # PG_MASTER_OOM_SCORE_ADJ=-1000
49+ # PG_CHILD_OOM_SCORE_ADJ=0
5250# Older Linux kernels may not have /proc/self/oom_score_adj, but instead
53- # /proc/self/oom_adj, which works similarly except the disable value is -17.
54- # For such a system, uncomment these two lines instead.
55- # OOM_ADJ=-17
56- # DAEMON_ENV="PG_OOM_ADJUST_FILE=/proc/self/oom_adj"
51+ # /proc/self/oom_adj, which works similarly except for having a different
52+ # range of scores. For such a system, uncomment these three lines instead:
53+ # PG_OOM_ADJUST_FILE=/proc/self/oom_adj
54+ # PG_MASTER_OOM_SCORE_ADJ=-17
55+ # PG_CHILD_OOM_SCORE_ADJ=0
5756
5857# # STOP EDITING HERE
5958
@@ -80,13 +79,19 @@ test -x $DAEMON ||
8079fi
8180}
8281
82+ # If we want to tell child processes to adjust their OOM scores, set up the
83+ # necessary environment variables. Can't just export them through the "su".
84+ if [-e " $PG_OOM_ADJUST_FILE " -a -n " PG_CHILD_OOM_SCORE_ADJ"
85+ then
86+ DAEMON_ENV=" PG_OOM_ADJUST_FILE=$PG_OOM_ADJUST_FILE PG_OOM_ADJUST_VALUE=$PG_CHILD_OOM_SCORE_ADJ "
87+ fi
88+
8389
8490# Parse command line parameters.
8591case $1 in
8692 start)
8793echo -n" Starting PostgreSQL:"
88- test x" $OOM_SCORE_ADJ " ! = x&& echo " $OOM_SCORE_ADJ " > /proc/self/oom_score_adj
89- test x" $OOM_ADJ " ! = x&& echo " $OOM_ADJ " > /proc/self/oom_adj
94+ test -e" $PG_OOM_ADJUST_FILE " && echo " $PG_MASTER_OOM_SCORE_ADJ " > " $PG_OOM_ADJUST_FILE "
9095su -$PGUSER -c" $DAEMON_ENV $DAEMON -D '$PGDATA ' &" >> $PGLOG 2>&1
9196echo " ok"
9297;;
@@ -98,8 +103,7 @@ case $1 in
98103 restart)
99104echo -n" Restarting PostgreSQL:"
100105su -$PGUSER -c" $PGCTL stop -D '$PGDATA ' -s -m fast -w"
101- test x" $OOM_SCORE_ADJ " ! = x&& echo " $OOM_SCORE_ADJ " > /proc/self/oom_score_adj
102- test x" $OOM_ADJ " ! = x&& echo " $OOM_ADJ " > /proc/self/oom_adj
106+ test -e" $PG_OOM_ADJUST_FILE " && echo " $PG_MASTER_OOM_SCORE_ADJ " > " $PG_OOM_ADJUST_FILE "
103107su -$PGUSER -c" $DAEMON_ENV $DAEMON -D '$PGDATA ' &" >> $PGLOG 2>&1
104108echo " ok"
105109;;