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Hive >> mail # user >> Re: Map join optimization issue


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Aniket Mokashi 2013-02-14, 08:11
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Re: Map join optimization issue
Yes, the hint was specified.
On Feb 14, 2013 3:11 AM, "Aniket Mokashi" <[EMAIL PROTECTED]> wrote:

> have you specified map-join hint in your query?
>
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> On Thu, Feb 7, 2013 at 11:39 AM, Mayuresh Kunjir <
> [EMAIL PROTECTED]> wrote:
>
>>
>> Hello all,
>>
>>
>> I am trying to join two tables, the smaller being of size 4GB. When I set
>> hive.mapjoin.smalltable.filesize parameter above 500MB, Hive tries to
>> perform a local task to read the smaller file. This of-course fails since
>> the file size is greater and the backup common join is then run. What I do
>> not understand is why did Hive attempt a map join when small file size was
>> greater than the smalltable.filesize parameter.
>>
>>
>> ~Mayuresh
>>
>>
>
>
> --
> "...:::Aniket:::... Quetzalco@tl"
>
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Aniket Mokashi 2013-02-15, 03:44
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Mayuresh Kunjir 2013-02-15, 15:37
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bejoy_ks@... 2013-02-15, 16:57
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Aniket Mokashi 2013-02-15, 21:05
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Mayuresh Kunjir 2013-02-15, 21:57