Postgres Pro
Downloads
Home   >   mailing lists

Re: judging acceptable discrepancy in row count v. estimate - Mailing list pgsql-general

From Tom Lane
Subject Re: judging acceptable discrepancy in row count v. estimate
Date
Msg-id 24387.1539716472@sss.pgh.pa.us
Whole thread Raw
In response to judging acceptable discrepancy in row count v. estimate  (Rob Sargent <robjsargent@gmail.com>)
Responses Re: judging acceptable discrepancy in row count v. estimate  (Rob Sargent <robjsargent@gmail.com>)
Re: judging acceptable discrepancy in row count v. estimate  (Rob Sargent <robjsargent@gmail.com>)
List pgsql-general
Tree view 
Rob Sargent <robjsargent@gmail.com> writes:
> Should reality be half again as large as the estimated row count?
> coon=# select count(*) from sui.segment;
>   count   
> ----------
>  49,942,837  -- my commas
> (1 row)

> coon=# vacuum (analyse, verbose) sui.probandset;

Uh, what does sui.probandset have to do with sui.segment ?

            regards, tom lane

pgsql-general by date:

Previous
From: Rob Sargent
Date:
Subject: judging acceptable discrepancy in row count v. estimate
Next
From: Rob Sargent
Date:
Subject: Re: judging acceptable discrepancy in row count v. estimate