Re: Filesystem fragmentation (Re: Fragmentation of WAL files)

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От Tom Lane
Тема Re: Filesystem fragmentation (Re: Fragmentation of WAL files)
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Msg-id 26942.1177609772@sss.pgh.pa.us
обсуждение исходный текст
Ответ на Re: Filesystem fragmentation (Re: Fragmentation of WAL files)  (Gregory Stark)
Список pgsql-performance
Дерево обсуждения
Fragmentation of WAL files  (Jim Nasby, )
 Re: Fragmentation of WAL files  (Bill Moran, )
  Re: Fragmentation of WAL files  (Heikki Linnakangas, )
   Filesystem fragmentation (Re: Fragmentation of WAL files)  (Bill Moran, )
    Re: Filesystem fragmentation (Re: Fragmentation of WAL files)  ("Craig A. James", )
     Re: Filesystem fragmentation (Re: Fragmentation of WAL files)  (Gregory Stark, )
      Re: Filesystem fragmentation (Re: Fragmentation of WAL files)  (Tom Lane, )
    Re: Filesystem fragmentation (Re: Fragmentation of WAL files)  (Florian Weimer, )
  Re: Fragmentation of WAL files  (Tom Lane, )
  Re: Fragmentation of WAL files  (Greg Smith, )
Gregory Stark <> writes:
> In the case of a performance-critical file like the WAL that's always read
> sequentially it may be to our advantage to defeat this technique and force it
> to be allocated sequentially. I'm not sure whether any filesystems provide any
> option to do so.

We more or less do that already by filling the entire file in one go
when it's created ...

            regards, tom lane

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