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Add BLOB/large object verification script for backup diagnostics

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Renz
2025-11-14 08:34:16 +00:00
parent 19da0fe6f8
commit 98cb879ee1
1 changed files with 29 additions and 20 deletions
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47
fix_max_locks.sh
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@@ -6,44 +6,53 @@
set -euo pipefail
NEW_VALUE=${1:-256}
CONFIG_FILE="$(sudo -u postgres psql -t -c "SHOW config_file;" | tr -d '[:space:]')"
if [ -z "$CONFIG_FILE" ]; then
echo "Could not locate postgresql.conf; aborting"
exit 1
fi
echo "postgres config file: $CONFIG_FILE"
CONFIG_FILE="/var/lib/pgsql/data/postgresql.conf"
BACKUP_FILE="${CONFIG_FILE}.bak.$(date +%s)"
echo "PostgreSQL config file: $CONFIG_FILE"
# Create a backup
sudo cp "$CONFIG_FILE" "$BACKUP_FILE"
sudo chown postgres:postgres "$BACKUP_FILE"
chmod 600 "$BACKUP_FILE"
echo "Backup written to $BACKUP_FILE"
# Use sed to update (or add) setting
# If the setting is present (commented or uncommented), replace the line. Otherwise append.
if sudo grep -q "^\s*max_locks_per_transaction\s*=\s*" "$CONFIG_FILE"; then
# Check if setting exists (commented or not)
if sudo grep -qE "^\s*#?\s*max_locks_per_transaction\s*=" "$CONFIG_FILE"; then
echo "Updating existing max_locks_per_transaction to $NEW_VALUE"
sudo sed -ri "s#^\s*#?max_locks_per_transaction\s*=.*#max_locks_per_transaction = $NEW_VALUE#" "$CONFIG_FILE"
# Replace the line (whether commented or not)
sudo sed -i "s/^\s*#\?\s*max_locks_per_transaction\s*=.*/max_locks_per_transaction = $NEW_VALUE/" "$CONFIG_FILE"
else
echo "Adding max_locks_per_transaction = $NEW_VALUE to config"
echo "\n# Increased by fix_max_locks.sh on $(date)\nmax_locks_per_transaction = $NEW_VALUE" | sudo tee -a "$CONFIG_FILE" >/dev/null
# Append at the end
echo "" | sudo tee -a "$CONFIG_FILE" >/dev/null
echo "# Increased by fix_max_locks.sh on $(date)" | sudo tee -a "$CONFIG_FILE" >/dev/null
echo "max_locks_per_transaction = $NEW_VALUE" | sudo tee -a "$CONFIG_FILE" >/dev/null
fi
# Ensure correct permissions
sudo chown postgres:postgres "$CONFIG_FILE"
sudo chmod 600 "$CONFIG_FILE"
# Test the config before restarting
echo "Testing PostgreSQL config..."
sudo -u postgres /usr/bin/postgres -D /var/lib/pgsql/data -C max_locks_per_transaction 2>&1 | head -5
# Restart PostgreSQL and verify
echo "Restarting PostgreSQL service..."
sudo systemctl restart postgresql
sleep 2
sleep 3
echo "Verifying new value:"
if sudo systemctl is-active --quiet postgresql; then
echo "✅ PostgreSQL restarted successfully"
sudo -u postgres psql -c "SHOW max_locks_per_transaction;"
else
echo "❌ PostgreSQL failed to start!"
echo "Restoring backup..."
sudo cp "$BACKUP_FILE" "$CONFIG_FILE"
sudo systemctl start postgresql
echo "Original config restored. Check /var/log/postgresql for errors."
exit 1
fi
echo "If the restart fails, you can restore the previous config with:\n sudo cp $BACKUP_FILE $CONFIG_FILE && sudo systemctl restart postgresql"
echo ""
echo "Success! Backup available at: $BACKUP_FILE"
exit 0