Re: [HACKERS] Experimental patch for inter-page delay in VACUUM

[Larry Rosenman]

--On Monday, November 10, 2003 13:40:24 -0500 Neil Conway <[EMAIL PROTECTED]> wrote:

Larry Rosenman <[EMAIL PROTECTED]> writes:

You might also look at Veritas' advisory stuff.

Thanks for the suggestion -- it looks like we can make use of
this. For the curious, the cache advisory API is documented here:

http://www.lerctr.org:8458/en/man/html.7/vxfsio.7.html
http://www.lerctr.org:8458/en/ODM_FSadmin/fssag-9.html#MARKER-9-1

Note that unlike for posix_fadvise(), the docs for this functionality
explicitly state:

    Some advisories are currently maintained on a per-file, not a
    per-file-descriptor, basis. This means that only one set of
    advisories can be in effect for all accesses to the file. If two
    conflicting applications set different advisories, both use the
    last advisories that were set.

BTW, if ANY developer wants to play with this, I can make an account for them. I have ODM installed on lerami.lerctr.org (www.lerctr.org is a CNAME).

LER

--
Larry Rosenman                     http://www.lerctr.org/~ler
Phone: +1 972-414-9812                 E-Mail: [EMAIL PROTECTED]
US Mail: 1905 Steamboat Springs Drive, Garland, TX 75044-6749

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