diff --git a/IT/SQL/PostgreSQL/Upgrade.md b/IT/SQL/PostgreSQL/Upgrade.md
index ad5667d..5b65bfa 100644
--- a/IT/SQL/PostgreSQL/Upgrade.md
+++ b/IT/SQL/PostgreSQL/Upgrade.md
@@ -26,6 +26,14 @@ sudo -iu postgres
 cd /var/lib/postgres/tmp
 ```
 
+- init new db
+
+```bash
+initdb -D /var/lib/postgres/data --locale=C.UTF-8 --encoding=UTF8 --data-checksums
+```
+
+- if use extention copy extention file from /usr/lib/postgresql/ to /opt/pgsql-PG_VERSION/lib
+
 - launch upgrade
 
 ```bash
@@ -35,6 +43,12 @@ pg_upgrade -b /opt/pgsql-PG_VERSION/bin -B /usr/bin -d /var/lib/postgres/olddata
 - check both pg_hba.conf in new  and old cluster
 - restart server `sc-start postgresql`
 
+if need to restart old database
+
+```bash
+/opt/pgsql-16/bin/pg_ctl -w -D "/var/lib/postgres/olddata" -o "-p 50432 -b  -c listen_addresses='' -c unix_socket_permissions=0700 -c unix_socket_directories='/var/lib/postgres/tmp'" stop
+```
+
 ## sequece manipulation
 
 sequence are use to generate uniq identifier