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Re: Cost of XLogInsert CRC calculations

This is a discussion on Re: Cost of XLogInsert CRC calculations within the pgsql Hackers forums, part of the PostgreSQL category; --> "Mark Cave-Ayland" <m.cave-ayland@webbased.co.uk> writes: > I'm still a little nervous about dropping down to CRC32 from CRC64 and so ...


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Old 04-11-2008, 05:10 AM
Tom Lane
 
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Default Re: Cost of XLogInsert CRC calculations

"Mark Cave-Ayland" <m.cave-ayland@webbased.co.uk> writes:
> I'm still a little nervous about dropping down to CRC32 from CRC64 and so
> was just wondering what the net saving would be using one CRC64 across the
> whole WAL record?


None to speak of; the startup/teardown time is trivial. It's the
per-byte cost that hurts.

regards, tom lane

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