Re: The BUFFER_HIT and BUFFER_MISS probes seem pretty darn redundant

From: Robert Lor <Robert(dot)Lor(at)Sun(dot)COM>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: pgsql-hackers(at)postgresql(dot)org
Subject: Re: The BUFFER_HIT and BUFFER_MISS probes seem pretty darn redundant
Date: 2009-03-24 21:45:03
Message-ID: 49C9545F.5040902@sun.com
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Tom Lane wrote:
> Whilst cleaning up the dtrace probe documentation, I realized that
> there is nothing the aforementioned probes tell you that you can't find
> out (with a lot more data besides) from the final argument of the
> BUFFER_READ_DONE probe. Furthermore, tallying them as-is would be
> misleading since you couldn't distinguish true reads from relation
> extension requests. I think we should just remove them.
>
Agreed. The found flag from BUFFER_READ_DONE will serve the same
purpose. As always, thanks for offering great solutions!

-Robert

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