Re: can we publish a aset interface?
| От | Robert Haas |
|---|---|
| Тема | Re: can we publish a aset interface? |
| Дата | |
| Msg-id | AANLkTi=yTS3zkqVkBX_SRBg5nJNkUZX8YSp9XjN-JW06@mail.gmail.com обсуждение исходный текст |
| Ответ на | Re: can we publish a aset interface? (Pavel Stehule <pavel.stehule@gmail.com>) |
| Ответы |
Re: can we publish a aset interface?
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| Список | pgsql-hackers |
On Tue, Sep 7, 2010 at 12:44 PM, Pavel Stehule <pavel.stehule@gmail.com> wrote: >> I don't see how you could do anything with this that you can't do with >> the existing implementation. It's not as if you can store pointers >> into an mmap'd block and then count on them being valid the next time >> you map the file... it might not end up at the same offset. > > you can, but you have to do preallocation and you have to use a FIXED flag. MAP_FIXED? As TFM says: "Because requiring a fixed address for a mapping is less portable, the use of this option is discouraged." -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise Postgres Company
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