[OpenIndiana-discuss] Slow zfs writes

[Robbie Crash]

If you weren't having any issues with speed and they've progressively
gotten worse, I'd look at dedup. If you're using dedup, you better make
sure you've got 2.5GB RAM for every TB of unique data you have, otherwise
you'll be swapping your dedup tables constantly and your read/write
performance is going to die.

On Mon, Feb 11, 2013 at 1:30 PM, Ian Collins <ian at ianshome.com> wrote:

> Ram Chander wrote:
>
>> Hi,
>>
>> My OI box is expreiencing slow zfs writes ( around 30 times slower ).
>> iostat reports below error though pool is healthy. This is happening in
>> past 4 days though no change was done to system. Is the hard disks faulty
>> ?
>> Please help.
>>
>
> Does iostat -xtcMn 10 show any anomalies such as long wait times or high
> %b?
>
> Your pool configuration is a bit odd, I assume this isn't a production
> system?
>
> --
> Ian.
>
>
>
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-- 
Seconds to the drop, but it seems like hours.

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