From ea1186c1dff94b7cf6c8063a8f9626668d981667 Mon Sep 17 00:00:00 2001
From: VitaliiMaltsev <39538064+VitaliiMaltsev@users.noreply.github.com>
Date: Wed, 26 Oct 2022 11:18:20 +0300
Subject: [PATCH] Postgres Source : updated docs for CDC setup (#18291)

* Postgres Source updated docs for CDC setup

* fixed typo

* fixed typo

* rephrased

* rephrased
---
 docs/integrations/sources/postgres.md | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/docs/integrations/sources/postgres.md b/docs/integrations/sources/postgres.md
index a0fb80c91a52c..40771e5f74bff 100644
--- a/docs/integrations/sources/postgres.md
+++ b/docs/integrations/sources/postgres.md
@@ -232,12 +232,14 @@ SELECT pg_create_logical_replication_slot('airbyte_slot', 'wal2json');
 
 For each table you want to replicate with CDC, add the replication identity (the method of distinguishing between rows) first:
 
-To use primary keys to distinguish between rows, run:
-
+To use primary keys to distinguish between rows for tables that don't have a large amount of data per row, run:
 ```
 ALTER TABLE tbl1 REPLICA IDENTITY DEFAULT;
 ```
-
+In case your tables use data types that support [TOAST](https://www.postgresql.org/docs/current/storage-toast.html) and have very large field values, use:
+```
+ALTER TABLE tbl1 REPLICA IDENTITY FULL;
+```
 After setting the replication identity, run:
 
 ```