Re: seq scan cache vs. index cache smackdown - Mailing list pgsql-performance

From PFC
Subject Re: seq scan cache vs. index cache smackdown
Date
Msg-id opsmx1n0mnth1vuj@musicbox
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In response to Re: seq scan cache vs. index cache smackdown  (Bruce Momjian <pgman@candle.pha.pa.us>)
List pgsql-performance
>> (For those not knowing - it's ReadFile/WriteFile where you pass an array
>> of "this many bytes to this address" as parameters)
>
> Isn't that like the BSD writev()/readv() that Linux supports also?  Is
> that something we should be using on Unix if it is supported by the OS?

    Nope, readv()/writev() read/write from/to the file sequentially to/from a
list of buffers in memory. The Windows calls read/write at random file
offsets to/from a list of buffers.



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