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IDS Forum

Re: mkramdisk

Posted By: Fernando Nunes
Date: Friday, 27 January 2012, at 10:17 a.m.

In Response To: mkramdisk (ANTHONY LANDRY)

That's totally unsuported, but I imagine you know that.
As Art wrote, it really depends on how much use of temp dbspace you have...
But then again, if you have plenty of RAM then you can configure your
instance to do things in memory instead of on disk...

Having said that, I once did something similar to test some INSERTs. I
noticed I was getting slow because of the logical logs, so I created a
dbspace in ramdisk and moved the logical logs there (how's that for
unsupported hmmmm?). I didn't kept numbers, but it really made a difference
(of course having logical logs in memory is more or less saying that you
don't care about recoverability, so why use logging after all). But I did
it for the "fun".

If by any chance you use temp for temporary tables, than something that
could be interesting would be to create tables using VTI (Virtual table
information) that would keep them in memory... Or eventually use external
dbspaces... But I never paid too much attention to any of these...

That could be the beginning of integrating solidDB "inside" Informix...
Regards.

On Fri, Jan 27, 2012 at 2:17 PM, ANTHONY LANDRY
<justicepvp+iiug@gmail.com>wrote:

> Greetings Everyone,
> This is my first post, and right away I have a question.
>
> I've been toying with the idea of using mkramdisk to create a large enough
> ram
> drive to hold my temp space.
>
> One concept that I've been contemplating is to have the server create a the
> ram disk on startup, and if successful, copies the temp DB space chunks to
> the
> ram disk, and re-link the symbolic file links to the chunks that now exist
> on
> the ram disk.
>
> Has anyone gone through with something similar to this? If so, how well
> did it
> work for you? Did you notice much in the way of performance increases?
>
> Thanks
>
>
>
> *******************************************************************************
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
>

--
Fernando Nunes
Portugal

http://informix-technology.blogspot.com
My email works... but I don't check it frequently...

--00248c769136a8e71304b783fd59

Messages In This Thread

  • mkramdisk
    ANTHONY LANDRY -- Friday, 27 January 2012, at 9:17 a.m.
    • Re: mkramdisk
      Art Kagel -- Friday, 27 January 2012, at 9:40 a.m.
    • Re: mkramdisk
      Fernando Nunes -- Friday, 27 January 2012, at 10:17 a.m.
    • Re: mkramdisk
      ANTHONY LANDRY -- Friday, 27 January 2012, at 12:58 p.m.
      • Re: mkramdisk
        Art Kagel -- Friday, 27 January 2012, at 3:13 p.m.
        • RE: mkramdisk
          Wyza, Jonathon -- Friday, 27 January 2012, at 3:22 p.m.
          • Re: mkramdisk
            Art Kagel -- Friday, 27 January 2012, at 3:34 p.m.
    • Re: mkramdisk
      Ivan Zavis DBA -- Saturday, 28 January 2012, at 4:17 a.m.

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