Re: Read/Write block sizes
| От | Jeffrey W. Baker |
|---|---|
| Тема | Re: Read/Write block sizes |
| Дата | |
| Msg-id | 1124861121.11270.1.camel@noodles обсуждение исходный текст |
| Ответ на | Re: Read/Write block sizes (Guy Thornley) |
| Ответы |
Re: Read/Write block sizes
(Tom Lane)
|
| Список | pgsql-performance |
Дерево обсуждения
Re: Read/Write block sizes (Was: Caching by Postgres)
(Jignesh Shah,
)
Re: Read/Write block sizes (Chris Browne, )
Re: Read/Write block sizes (Michael Stone, )
Re: Read/Write block sizes ("Jim C. Nasby", )
Re: Read/Write block sizes ("Jignesh K. Shah", )
Re: Read/Write block sizes (Bruce Momjian, )
Re: Read/Write block sizes (Steve Poe, )
Re: Read/Write block sizes (Josh Berkus, )
Re: Read/Write block sizes (Alan Stange, )
Re: Read/Write block sizes ("Jeffrey W. Baker", )
Re: Read/Write block sizes (Tom Lane, )
Re: Read/Write block sizes (Josh Berkus, )
Re: Read/Write block sizes (Guy Thornley, )
Re: Read/Write block sizes ("Jeffrey W. Baker", )
Re: Read/Write block sizes (Tom Lane, )
Re: Read/Write block sizes ("Jeffrey W. Baker", )
Re: Read/Write block sizes (Josh Berkus, )
Re: Read/Write block sizes (Ron, )
Re: Read/Write block sizes (PFC, )
Re: Read/Write block sizes (Was: Caching by Postgres) (Michael Stone, )
Re: Read/Write block sizes (Was: Caching by Postgres) ("Jeffrey W. Baker", )
Re: Read/Write block sizes (Chris Browne, )
Re: Read/Write block sizes ("Jim C. Nasby", )
Re: Read/Write block sizes (Chris Browne, )
Re: Read/Write block sizes (Ron, )
Re: Read/Write block sizes (Chris Browne, )
Re: Read/Write block sizes (Michael Stone, )
Re: Read/Write block sizes ("Jim C. Nasby", )
Re: Read/Write block sizes ("Jignesh K. Shah", )
Re: Read/Write block sizes (Bruce Momjian, )
Re: Read/Write block sizes (Steve Poe, )
Re: Read/Write block sizes (Josh Berkus, )
Re: Read/Write block sizes (Alan Stange, )
Re: Read/Write block sizes ("Jeffrey W. Baker", )
Re: Read/Write block sizes (Tom Lane, )
Re: Read/Write block sizes (Josh Berkus, )
Re: Read/Write block sizes (Guy Thornley, )
Re: Read/Write block sizes ("Jeffrey W. Baker", )
Re: Read/Write block sizes (Tom Lane, )
Re: Read/Write block sizes ("Jeffrey W. Baker", )
Re: Read/Write block sizes (Josh Berkus, )
Re: Read/Write block sizes (Ron, )
Re: Read/Write block sizes (PFC, )
Re: Read/Write block sizes (Was: Caching by Postgres) (Michael Stone, )
Re: Read/Write block sizes (Was: Caching by Postgres) ("Jeffrey W. Baker", )
Re: Read/Write block sizes (Chris Browne, )
Re: Read/Write block sizes ("Jim C. Nasby", )
Re: Read/Write block sizes (Chris Browne, )
Re: Read/Write block sizes (Ron, )
On Wed, 2005-08-24 at 17:20 +1200, Guy Thornley wrote: > As for the async IO, sure you might think 'oh async IO would be so cool!!' > and I did, once, too. But then I sat down and _thought_ about it, and > decided well, no, actually, theres _very_ few areas it could actually help, > and in most cases it just make it easier to drive your box into lseek() > induced IO collapse. > > Dont forget that already in postgres, you have a process per connection, and > all the processes take care of their own I/O. That's the problem. Instead you want 1 or 4 or 10 i/o slaves coordinating the I/O of all the backends optimally. For instance, with synchronous scanning. -jwb
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