Re: Migration \ OID question

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От Tom Lane
Тема Re: Migration \ OID question
Дата
Msg-id 15558.1230008523@sss.pgh.pa.us
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Ответ на Re: Migration \ OID question  ("Lipker, Joseph" <Joseph.Lipker@WRECO1.com>)
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"Lipker, Joseph" <Joseph.Lipker@WRECO1.com> writes:
> You mentioned "performance glitches". What would those be? Errors or system performance slowdowns.

Slowdowns --- specifically, the behavior is "generate next sequential
OID, probe index to see if it exists in table, repeat until not".
So if you've got a long run of consecutive OIDs in the same table,
when the OID counter reaches that point it could take a while to
assign the next free OID successfully.  This would manifest as a slower
than expected INSERT.

            regards, tom lane

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