Re: Auto-tuning work_mem and maintenance_work_mem

On Thu, Oct 10, 2013 at 8:46 PM, Robert Haas <robertmhaas@gmail.com> wrote:
> On Thu, Oct 10, 2013 at 2:45 PM, Josh Berkus <josh@agliodbs.com> wrote:
>> On 10/10/2013 11:41 AM, Robert Haas wrote:
>>> tunedb --available-memory=32GB
>>>
>>> ...and it will print out a set of proposed configuration settings.  If
>>> we want a mode that rewrites the configuration file, we could have:
>>>
>>> tunedb --available-memory=32GB --rewrite-config-file=$PATH
>>>
>>> ...but that might be overkill, at least for version 1.
>>
>> Given that we are talking currently about ALTER SYSTEM SET *and*
>> configuration directories, we should not be rewriting any existing
>> config file.  We should be adding an auto-generated one, or using ALTER
>> SYSTEM SET.
>>
>> In fact, why don't we just do this though ALTER SYSTEM SET?  add a
>> plpgsql function called pg_tune().
>
> That's another way to do it, for sure.  It does require the ability to
> log in to the database.  I imagine that could be less convenient in
> some scripting environments.

I think that would also make it much harder to automate for packagers.

-- Magnus HaganderMe: http://www.hagander.net/Work: http://www.redpill-linpro.com/