50 lines
1.7 KiB
Bash
Executable File
50 lines
1.7 KiB
Bash
Executable File
#!/usr/bin/env bash
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# fix_max_locks.sh
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# Safely update max_locks_per_transaction in postgresql.conf and restart PostgreSQL
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# Usage: sudo ./fix_max_locks.sh [NEW_VALUE]
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set -euo pipefail
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NEW_VALUE=${1:-256}
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CONFIG_FILE="$(sudo -u postgres psql -t -c "SHOW config_file;" | tr -d '[:space:]')"
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if [ -z "$CONFIG_FILE" ]; then
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echo "Could not locate postgresql.conf; aborting"
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exit 1
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fi
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echo "postgres config file: $CONFIG_FILE"
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BACKUP_FILE="${CONFIG_FILE}.bak.$(date +%s)"
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# Create a backup
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sudo cp "$CONFIG_FILE" "$BACKUP_FILE"
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sudo chown postgres:postgres "$BACKUP_FILE"
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chmod 600 "$BACKUP_FILE"
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echo "Backup written to $BACKUP_FILE"
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# Use sed to update (or add) setting
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# If the setting is present (commented or uncommented), replace the line. Otherwise append.
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if sudo grep -q "^\s*max_locks_per_transaction\s*=\s*" "$CONFIG_FILE"; then
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echo "Updating existing max_locks_per_transaction to $NEW_VALUE"
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sudo sed -ri "s#^\s*#?max_locks_per_transaction\s*=.*#max_locks_per_transaction = $NEW_VALUE#" "$CONFIG_FILE"
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else
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echo "Adding max_locks_per_transaction = $NEW_VALUE to config"
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echo "\n# Increased by fix_max_locks.sh on $(date)\nmax_locks_per_transaction = $NEW_VALUE" | sudo tee -a "$CONFIG_FILE" >/dev/null
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fi
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# Ensure correct permissions
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sudo chown postgres:postgres "$CONFIG_FILE"
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sudo chmod 600 "$CONFIG_FILE"
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# Restart PostgreSQL and verify
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echo "Restarting PostgreSQL service..."
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sudo systemctl restart postgresql
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sleep 2
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echo "Verifying new value:"
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sudo -u postgres psql -c "SHOW max_locks_per_transaction;"
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echo "If the restart fails, you can restore the previous config with:\n sudo cp $BACKUP_FILE $CONFIG_FILE && sudo systemctl restart postgresql"
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exit 0
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