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Re: [PATCHES] [PATCH] Provide 8-byte transaction IDs to - Mailing list pgsql-hackers

From Tom Lane
Subject Re: [PATCHES] [PATCH] Provide 8-byte transaction IDs to
Date
Msg-id 28412.1156181388@sss.pgh.pa.us
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In response to Re: [PATCHES] [PATCH] Provide 8-byte transaction IDs to  ("Marko Kreen" <markokr@gmail.com>)
Responses Re: [PATCHES] [PATCH] Provide 8-byte transaction IDs to
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"Marko Kreen" <markokr@gmail.com> writes:
> On 8/21/06, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> I'm not following the point here.  Dump and restore has never intended
>> to preserve the transaction counter, so why should it preserve
>> high-order bits of the transaction counter?

> Thus it guarantees that any new issued large txid's will be larger
> than existing ones in tables.  Thus code can depend on monotonous
> growth.

Within a single installation, sure, but I don't buy that we ought to try
to preserve XIDs across installations.
        regards, tom lane

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