On 2017-07-12 12:03 (-0700), Fay Hou [Storage Service] ­ <fay...@coupang.com> 
wrote: 
> First, a big thank to Jeff who spent endless time to help this mailing list.
> Agreed that we should tune the key cache. In my case, my key cache hit rate
> is about 20%. mainly because we do random read. We just going to leave the
> index_interval as is for now.
> 

That's pretty painful. If you can up that a bit, it'll probably help you out. 
You can adjust the index intervals, too, but I'd significantly increase key 
cache size first if it were my cluster.


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