Re: Buglist
От | Jan Wieck |
---|---|
Тема | Re: Buglist |
Дата | |
Msg-id | 3F43D5B7.2000108@Yahoo.com обсуждение исходный текст |
Ответ на | Re: Buglist (Tom Lane <tgl@sss.pgh.pa.us>) |
Ответы |
Re: Buglist
|
Список | pgsql-general |
Tom Lane wrote: > Recall also that "committed deleted" does not mean "safe to remove". > There may still be live transactions that could see the tuple. The > "committed deleted" bit just exists to allow subsequent visitors to the > row to skip one of the more expensive steps in deciding whether they can > see it or not. > > To determine that a row is removable requires additional tests above and > beyond what backends normally do. Aah - there is the first bullet hole in my multi-ctid-index-idea. Now the question becomes how expensive these tests are (if a normal backend can do them at all within reason)? Jan -- #======================================================================# # It's easier to get forgiveness for being wrong than for being right. # # Let's break this rule - forgive me. # #================================================== JanWieck@Yahoo.com #
В списке pgsql-general по дате отправления: