does postgresql backup require additional space on disk

From: Julie Nishimura <juliezain(at)hotmail(dot)com>
To: "pgsql-general(at)lists(dot)postgresql(dot)org" <pgsql-general(at)lists(dot)postgresql(dot)org>, pgsql-general <pgsql-general(at)postgresql(dot)org>
Subject: does postgresql backup require additional space on disk
Date: 2019-05-13 17:59:22
Message-ID: BYAPR08MB5014E959330C8E249341F66CAC0F0@BYAPR08MB5014.namprd08.prod.outlook.com
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Hello,
we are almost out of disk space on one of our servers (99% full). If we run pg_dump to a diff location, does it require any additional disk space on our current server? I am asking, because on some other software, a backup might open transaction which keeps growing and eventually consume all space, keeping tran open for the backup duration. Please clarify? Thanks

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