Why does PostgreSQL ftruncate before unlink?

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От Jon Nelson
Тема Why does PostgreSQL ftruncate before unlink?
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Msg-id CAKuK5J1YZZXp5KxbGn4AJhAbmfSUCcoFZmp4My+u6s7pgBB3Og@mail.gmail.com
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Ответы Re: Why does PostgreSQL ftruncate before unlink?
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When dropping lots of tables, I noticed postgresql taking longer than
I would have expected.

strace seems to report that the largest contributor is the ftruncate
and not the unlink. I'm curious what the logic is behind using
ftruncate before unlink.

I'm using an ext4 filesystem.

--
Jon

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