Re: Why we are going to have to go DirectIO - Mailing list pgsql-hackers

From Robert Haas
Subject Re: Why we are going to have to go DirectIO
Date
Msg-id CA+TgmoYzUHBnqHNeGO0jRvUY0wtySnbYRMw312kpcXrxMtRAEQ@mail.gmail.com
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In response to Re: Why we are going to have to go DirectIO  (Josh Berkus <josh@agliodbs.com>)
List pgsql-hackers
On Thu, Dec 5, 2013 at 12:54 PM, Josh Berkus <josh@agliodbs.com> wrote:
> Actually, I've been able to do 35K TPS on commodity hardware on Ubuntu
> 10.04.   I have yet to go about 15K on any Ubuntu running a 3.X Kernel.
>  The CPU scheduling on 2.6 just seems to be far better tuned, aside from
> the IO issues; at 35K TPS, the CPU workload is evenly distributed across
> cores, whereas on 3.X it lurches from core to core like a drunk in a
> cathedral.

Do drunks lurch differently in cathedrals than they do elsewhere?

-- 
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company



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