Re: postgres performance tunning

On Thu, Jan 6, 2011 at 2:41 PM, Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com> wrote:
> On Thu, Jan 6, 2011 at 2:31 PM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
>> On Mon, Dec 20, 2010 at 12:49 PM, Greg Smith <greg(at)2ndquadrant(dot)com> wrote:
>>> Scott Marlowe wrote:
>>>> I can sustain about 5,000 transactions per second on a machine with 8
>>>> cores (2 years old) and 14 15k seagate hard drives.
>>>
>>> Right.  You can hit 2 to 3000/second with a relatively inexpensive system,
>>> so long as you have a battery-backed RAID controller and a few hard drives.
>>>  Doing 5K writes/second is going to take a giant pile of hard drive or SSDs
>>> to pull off.  There is no possible way to meet the performance objectives
>>> here without a lot more cores in the server and some pretty beefy storage
>>> too.
>>
>> Is this with synchronous_commit on, or off?
>
> Off.  It doesn't seem to make a lot of difference one you're running
> on a good battery backed caching RAID controller.

Sorry, that's ON not OFF. Turning it off doesn't seem to ...