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From Jason Toy <>
Subject Re: date issues
Date Thu, 23 Feb 2012 07:55:31 GMT
Can I still do range searches on a string? It seems like it would be more efficient to store
as an integer.
> Hi,
> You could consider storing date field as String in "YYYYMMDD" format. This
> will save space and it will perform better.
> Regards
> Aditya
> On Thu, Feb 23, 2012 at 11:55 AM, Jason Toy <> wrote:
>> I  have a solr instance with about 400m docs. For text searches it is
>> perfectly fine. When I do searches that calculate  the amount of times a
>> word appeared in the doc set for every day of a month, it usually causes
>> solr to crash with out of memory errors.
>> I calculate this by running  ~30 queries, one for each day to see the
>> count for that day.
>> Is there a better way I could do this?
>> Currently the date fields are stored as:
>> <fieldType name="date" class="solr.TrieDateField" omitNorms="true"
>> precisionStep="0" positionIncrementGap="0"/>
>> and the timestamps are stored in the format of:
>> 2012-02-22T21:11:14Z
>> We have no need to store anything beyond the date. Will just changing the
>> time portion to zeros make things faster:
>> 2012-02-22T00:00:00Z
>> I thought that to optimize this, there would be an actual date type that
>> doesnt store the time component, but looking through the solr docs, I don't
>> see anything specifically for a date as opposed to a timestamp.  Would it
>> be faster for me to store dates in an sint format?  What is the optimal
>> format I should use? If the format is to continue to use TrieDateField,  is
>> it not a waste to store the hour/minute/seconds even if they are not being
>> used?
>> Is there anything else I can do to make this more efficient?
>> I have looked around on the mailing list and on google and not sure what
>> to use, I would appreciate any pointers.  Thanks.
>> Jason
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