Re: [HACKERS] HOT WIP Patch - version 2
От | Bruce Momjian |
---|---|
Тема | Re: [HACKERS] HOT WIP Patch - version 2 |
Дата | |
Msg-id | 200702201423.l1KENUq18139@momjian.us обсуждение исходный текст |
Ответ на | HOT WIP Patch - version 2 ("Pavan Deolasee" <pavan.deolasee@gmail.com>) |
Ответы |
Re: [HACKERS] HOT WIP Patch - version 2
Re: [HACKERS] HOT WIP Patch - version 2 |
Список | pgsql-patches |
Pavan Deolasee wrote: > When following a HOT-update chain from the index fetch, if we notice that > the root tuple is dead and it is HOT-updated, we try to prune the chain to > the smallest possible length. To do that, the share lock is upgraded to an > exclusive lock and the tuple chain is followed till we find a > live/recently-dead > tuple. At that point, the root t_ctid is made point to that tuple. In order I assume you meant recently-dead here, rather than live/recently-dead, because we aren't going to change live ctids, right? -- Bruce Momjian <bruce@momjian.us> http://momjian.us EnterpriseDB http://www.enterprisedb.com + If your life is a hard drive, Christ can be your backup. +
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