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Re: meaning of default_statistics_target

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Martin Marques escribió:

> Is the value measured in some scale, or does it depend on something  
> internal? What does 1000 mean?

1000 histogram and MCV entries, and also a larger sample:

>> Increasing the target also increases the number of rows that ANALYZE
>> samples to prepare the stats, so you should theoretically get more
>> accurate stats for the other columns too, even though they'll still get
>> boiled down to the same array lengths as before.

How larger is the sample, I don't know.

-- 
Alvaro Herrera                                http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.


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