---
title: Postgres
description: 
published: true
date: 2025-11-21T17:28:17.490Z
tags: 
editor: markdown
dateCreated: 2025-11-21T17:22:18.109Z
---

# Postgres 

## Update database 

stop the running instance 
```
sudo systemctl stop postgresql
```

install the upgrade tool
```
sudo pacman -S postgresql-old-upgrade
```

Check where the installed files are with 
```
pacman -Ql postgresql-old-upgrade
```

Initalize the new database 
```
sudo -u postgres initdb -D /var/lib/postgres/data_18 --no-data-checksums
```

Do the upgrade 
-b previous binaries 
-d previous data folder 
```
sudo -u postgres \
  pg_upgrade \
  -b /opt/pgsql-17/bin/ \
  -B /usr/bin/ \
  -d /var/lib/postgres/data \ 
  -D /var/lib/postgres/data_18 \
  -O "-c timescaledb.restoring='on'"
```

Rename the data folder 
```
mv /var/lib/postgres/data  /var/lib/postgres/data_old
mv /var/lib/postgres/data_18  /var/lib/postgres/data
```

start postgres 
```
sudo systemctl start postgresql
```