On Thu, May 3, 2012 at 7:05 AM, Shaun Thomas <stho...@optionshouse.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



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> Shaun Thomas
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