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Determine max_connections first, then see how large shared_buffers can

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be made, to avoid corner cases where max_connections ends up unreasonably
small because shared_buffers is hogging too much shmem space.  Per pghackers
discussion about a week ago.  Also, fix the copy-newlines problem in a
more robust way, by using COPY FROM filename instead of COPY FROM STDIN;
per a suggestion from Peter.
This commit is contained in:
Tom Lane 2003-10-13 21:06:44 +00:00
parent e7261c46aa
commit 87299583a5
1 changed files with 21 additions and 21 deletions
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42
src/bin/initdb/initdb.sh
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@ -27,7 +27,7 @@
# Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
# Portions Copyright (c) 1994, Regents of the University of California
#
# $Header: /cvsroot/pgsql/src/bin/initdb/Attic/initdb.sh,v 1.203 2003/09/27 16:27:57 momjian Exp $
# $Header: /cvsroot/pgsql/src/bin/initdb/Attic/initdb.sh,v 1.204 2003/10/13 21:06:44 tgl Exp $
#
#-------------------------------------------------------------------------
@ -550,30 +550,20 @@ echo "$short_version" > "$PGDATA/PG_VERSION" || exit_nicely
#
# DETERMINE PLATFORM-SPECIFIC CONFIG SETTINGS
#
# Use reasonable values if kernel will let us, else scale back
# Use reasonable values if kernel will let us, else scale back. Probe for
# max_connections first since it is subject to more constraints than
# shared_buffers.
# common backend options
PGSQL_OPT="-F -D$PGDATA"
cp /dev/null "$PGDATA"/postgresql.conf || exit_nicely
$ECHO_N "selecting default shared_buffers... "$ECHO_C
for nbuffers in 1000 900 800 700 600 500 400 300 200 100 50
do
TEST_OPT="$PGSQL_OPT -c shared_buffers=$nbuffers -c max_connections=5"
if "$PGPATH"/postgres -boot -x0 $TEST_OPT template1 </dev/null >/dev/null 2>&1
then
break
fi
done
echo "$nbuffers"
$ECHO_N "selecting default max_connections... "$ECHO_C
for nconns in 100 50 40 30 20 10
do
nbuffers=`expr $nconns '*' 5`
TEST_OPT="$PGSQL_OPT -c shared_buffers=$nbuffers -c max_connections=$nconns"
if "$PGPATH"/postgres -boot -x0 $TEST_OPT template1 </dev/null >/dev/null 2>&1
then
@ -583,6 +573,19 @@ done
echo "$nconns"
$ECHO_N "selecting default shared_buffers... "$ECHO_C
for nbuffers in 1000 900 800 700 600 500 400 300 200 100 50
do
TEST_OPT="$PGSQL_OPT -c shared_buffers=$nbuffers -c max_connections=$nconns"
if "$PGPATH"/postgres -boot -x0 $TEST_OPT template1 </dev/null >/dev/null 2>&1
then
break
fi
done
echo "$nbuffers"
##########################################################################
#
# CREATE CONFIG FILES
@ -1088,12 +1091,9 @@ $ECHO_N "creating information schema... "$ECHO_C
echo "UPDATE information_schema.sql_implementation_info SET character_value = '$combined_version' WHERE implementation_info_name = 'DBMS VERSION';"
echo "COPY information_schema.sql_features (feature_id, feature_name, sub_feature_id, sub_feature_name, is_supported, comments) FROM STDIN;"
cat "$datadir"/sql_features.txt
echo "\."
) |
tr -d '\r' | # make newlines consistent for Win32
"$PGPATH"/postgres $PGSQL_OPT template1 > /dev/null || exit_nicely
echo "COPY information_schema.sql_features (feature_id, feature_name, sub_feature_id, sub_feature_name, is_supported, comments) FROM '$datadir/sql_features.txt';"
) \
| "$PGPATH"/postgres $PGSQL_OPT template1 > /dev/null || exit_nicely
echo "ok"
$ECHO_N "vacuuming database template1... "$ECHO_C