| From: | Dave Page <dpage(at)pgadmin(dot)org> |
|---|---|
| To: | Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com> |
| Cc: | Josh Berkus <josh(at)agliodbs(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Robert Haas <robertmhaas(at)gmail(dot)com>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Closing some 8.4 open items |
| Date: | 2009-04-08 18:25:20 |
| Message-ID: | 937d27e10904081125t536ee0a7qa4f56d13d727a35c@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Wed, Apr 8, 2009 at 6:42 PM, Heikki Linnakangas
<heikki(dot)linnakangas(at)enterprisedb(dot)com> wrote:
> Dave Page wrote:
>>
>> On Wednesday, April 8, 2009, Josh Berkus <josh(at)agliodbs(dot)com> wrote:
>>>
>>> Presumably fadvise is useless on Windows. Anyone know?
>>
>> It is.
>
> cygwin supports POSIX_FADV_SEQUENTIAL (and POSIX_FADV_NORMAL to revert it),
> but not any of the other flags. It maps it to NtSetInformationFile() like
> this:
>
>> if (advice == POSIX_FADV_SEQUENTIAL)
>> fmi.Mode |= FILE_SEQUENTIAL_ONLY;
>> status = NtSetInformationFile (get_handle (), &io, &fmi, sizeof fmi,
>> FileModeInformation);
Which is only useful with async IO as far as I'm aware.
--
Dave Page
EnterpriseDB UK: http://www.enterprisedb.com
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