Re: ASM Filter Driver Performance

Very nice write-up Jared!

It just seems very odd to me. Not because of your findings per se. But this is an Oracle product. If they did something to optimize performance, they must've been aware of this when they released the product. And if Oracle does something that makes something else 20-30% faster, you'd think they'd make a whole lot of noise about it :)

Could they be using a different syscall that does some implicit heuristic based caching or something else? And what we're seeing is actually a new Linux feature and not an Oracle feature?

Did you look at strace at all of any of those tests?

Stefan

On Fri, Jan 26, 2018 at 3:47 AM, Jared Still <jkstill_at_gmail.com> wrote:

>
> Hello,
>
> Some of you may find this interesting.
>
> As much of a pain as it is to setup ASM Filter Driver 12.2, I have now
> done so several times just so I could see how it works and compare it to
> udev and ASMLib.
>
> What I found was not what I was looking for: 20% better IO performance
> over ASMLib.
>
> https://blog.pythian.com/improve-oracle-performance-asm-filter-driver/
>
>
> Jared Still
> Certifiable Oracle DBA and Part Time Perl Evangelist
> Principal Consultant at Pythian
> Pythian Blog http://www.pythian.com/blog/author/still/
> Github: https://github.com/jkstill
>
>
>

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