Re: pg_dump backup size very less

From: bricklen <bricklen(at)gmail(dot)com>
To: Sumeet Shukla <sumeet(dot)k(dot)shukla(at)gmail(dot)com>
Cc: pgsql-admin <pgsql-admin(at)postgresql(dot)org>
Subject: Re: pg_dump backup size very less
Date: 2017-05-03 13:28:54
Message-ID: CAGrpgQ9Ot4qc6qEf7LR740kSYaQefaNx+3qdpioBve_iudw2HQ@mail.gmail.com
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On Wed, May 3, 2017 at 1:19 AM, Sumeet Shukla <sumeet(dot)k(dot)shukla(at)gmail(dot)com>
wrote:

> pg_dump in custom format is creating a dump of only 29 GB for a DB of size
> 700GB. Can you please help me understand what could be the reason behind it.
>

That ratio aligns with what I see in my <1TB databases. If you calculate
the size of just the data and exclude any indexes or relation bloat, that
total is what is compressed in your custom-format pg_dump backup.

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