Re: Turn off Hyperthreading! WAS: 60 core performance with 9.3

On 08/21/2014 04:08 PM, Steve Crawford wrote:
> On 08/21/2014 03:51 PM, Josh Berkus wrote:
>> On 08/21/2014 02:26 PM, Scott Marlowe wrote:
>>> I'm running almost the exact same setup in production as a spare. It
>>> has 4 of those CPUs, 256G RAM, and is currently set to use HT. Since
>>> it's a spare node I might be able to do some testing on it as well.
>>> It's running a 3.2 kernel right now. I could probably get a later
>>> model kernel on it even.
>> You know about the IO performance issues with 3.2, yes?
>>
> Were those 3.2 only and since fixed or are there issues persisting in
> 3.2+? The 12.04 LTS release of Ubuntu Server was 3.2 but the 14.04 is 3.13.

The issues I know of were fixed in 3.9.

--
Josh Berkus
PostgreSQL Experts Inc.
http://pgexperts.com