Re: explain analyze cost - Mailing list pgsql-general

From Andres Freund
Subject Re: explain analyze cost
Date
Msg-id 20181212230545.xg22ufkuqnv4hsbz@alap3.anarazel.de
Whole thread Raw
In response to explain analyze cost  (Ravi Krishna <srkrishna@fastmail.com>)
Responses Re: explain analyze cost  (Ravi Krishna <srkrishna@fastmail.com>)
List pgsql-general
On 2018-12-12 17:37:47 -0500, Ravi Krishna wrote:
> I am running explain analyze cost on a SQL which reads from two large
> tables (122mil and 37 mil).  The query is an UPDATE SQL where we use
> derives table in the from clause and then join it back to the table
> being updated.
> The explain analyze cost itself is taking forever to run. It is running
> for the last 1 hr. Does that actually run the SQL to find out the
> impact of I/O (as indicated in COSTS). If not, what can cause it to run
> this slow.__

Please do not hijack other threads by replying to a message and changing
the subject.  Just send a new mail to
pgsql-general@lists.postgresql.org, or whatever list you want to send an
email to.

Thanks,

Andres


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