> Hi all.

> I'm performance tunning my application and found that some aggregation and
> mr operations take long time. So I try to .explain() the query for those
> operations and found that mongo doesn't choose wisely, if I hint at it it
> will be lot faster than the original (in 1 query from 16700ms to 29ms).

> So my question is if there is a way to give hint to aggregation and or MR
> operations?

> Thanks

> i think you can use $hint in your query expression you are doing with agg
> framework and/or MR.  maybe.

> On Wednesday, November 7, 2012 10:15:30 AM UTC-5, Esteban Feldman wrote:

>> Hi all.

>> I'm performance tunning my application and found that some aggregation
>> and mr operations take long time. So I try to .explain() the query for
>> those operations and found that mongo doesn't choose wisely, if I hint at
>> it it will be lot faster than the original (in 1 query from 16700ms to
>> 29ms).

>> So my question is if there is a way to give hint to aggregation and or MR
>> operations?

>> Thanks

> sorry that doesn't work
> nevermind

> this is a future feature we need to add

> what is the query that requires a hint?

> On Thursday, November 8, 2012 3:02:29 PM UTC-5, Dwight Merriman wrote:

>> i think you can use $hint in your query expression you are doing with agg
>> framework and/or MR.  maybe.

>> On Wednesday, November 7, 2012 10:15:30 AM UTC-5, Esteban Feldman wrote:

>>> Hi all.

>>> I'm performance tunning my application and found that some aggregation
>>> and mr operations take long time. So I try to .explain() the query for
>>> those operations and found that mongo doesn't choose wisely, if I hint at
>>> it it will be lot faster than the original (in 1 query from 16700ms to
>>> 29ms).

>>> So my question is if there is a way to give hint to aggregation and or
>>> MR operations?

>>> Thanks