fsync data directory after DB crash

From: Pandora <yeyukui(at)qq(dot)com>
To: pgsql-general <pgsql-general(at)lists(dot)postgresql(dot)org>
Subject: fsync data directory after DB crash
Date: 2023-07-18 08:50:25
Message-ID: tencent_2B8A7724376F52FB4258043D2B484D95DE09@qq.com
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I found that starting from version 9.5, PostgreSQL will do fsync on the entire data directory after DB crash. Here's a question: if I have FPW = on, why is this step still necessary?

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