Question re: General Performance Stats

[Ask Bjørn Hansen]

On Jul 20, 2007, at 2:19 PM, Andrew B. Westmoreland wrote:

[....]
>  Whereas a simple "select a from b where primary key ='x' " was  
> taking ~300ms to get from our database over a simple (and very  
> busy) GigE switch, the memcache is running on localhost and is  
> seeing "query" times more like ~600ms.
>
> We tested it on many batch runs, and it seems that using the  
> memcache (as configured) causes a performance hit of approximately  
> 20%.  This is for a CPU-bound process that uses 100% of all CPU  
> cores in both testing scenarios.

Did you try putting memcached on another host with free CPU?

(Is the 300 vs 600ms *per db/memcached query* ?!)



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