Re: Syscaches should store negative entries, too
От | Bruce Momjian |
---|---|
Тема | Re: Syscaches should store negative entries, too |
Дата | |
Msg-id | 200202011932.g11JWZM29513@candle.pha.pa.us обсуждение исходный текст |
Ответ на | Re: Syscaches should store negative entries, too (Hannu Krosing <hannu@krosing.net>) |
Список | pgsql-hackers |
Hannu Krosing wrote: > On Thu, 2002-01-31 at 00:00, Tom Lane wrote: > > > > To make negative cache entries work correctly, we'd have to issue > > cross-backend SI messages for inserts into the system catalogs, not > > only for updates and deletes. This would mean more SI traffic than > > there is now. I think it'd still be a win, but the case for negative > > cache entries isn't quite as airtight as I thought. There could be > > scenarios where the extra SI traffic outweighs the savings from avoiding > > failing catalog searches. > > > > Comments anyone? > > The standard one - if not sure, make it an option ;) Actually, that is not our standard comment. We want to give people a limited set of meaningful options. If then want billions of options, they should use Oracle. :-) -- Bruce Momjian | http://candle.pha.pa.us pgman@candle.pha.pa.us | (610) 853-3000+ If your life is a hard drive, | 830 Blythe Avenue + Christ can be your backup. | Drexel Hill, Pennsylvania19026
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