Re: Configuration Recommendations

On Thu, May 3, 2012 at 7:05 AM, Shaun Thomas <sthomas(at)optionshouse(dot)com>wrote:

> I like to follow this:
>
> http://www.westnet.com/~**gsmith/content/linux-pdflush.**htm<http://www.westnet.com/%7Egsmith/content/linux-pdflush.htm>
>

Thanks for the reference, Shaun.

> As a note, there are actually new tunables for some of this: dirty_bytes,
> and dirty_background_bytes. With them, you can match them better to the
> actual size of your controller write cache so you can avoid page flush
> storms causing IO stalls.

That sounds interesting. How do you identify a page flush storm?

> Mr. Nielsen's setup actually looks pretty darn good. It's my personal
> opinion he might run into some IO waits if he plans to use this for heavy
> OLTP, thanks to having only 8 spindles in his RAID1+0, but he may
> eventually grow into a SAN. That's fine. It's a good starting point.

Cool - thanks, again, for the review, Shaun.

Cheers,

Jan

>
>
> --
> Shaun Thomas
> OptionsHouse | 141 W. Jackson Blvd. | Suite 500 | Chicago IL, 60604
> 312-444-8534
> sthomas(at)optionshouse(dot)com
>
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