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From: John R Pierce <pierce@hogranch.com>
To: pgsql-general@postgresql.org
Subject: Re: Checkpoint_segments optimal value
Date: Thu, 17 Jul 2014 17:10:22 -0700
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On 7/17/2014 5:01 PM, Prabhjot Sheena wrote:
> i just did explain analyze and currently database is running slow coz 
> of the query
>
> explain ANALYZE SELECT account.id <http://account.id;, 
> account.organization_id, run.application_id, work_unit.script, 
> work_unit.id <http://work_unit.id;, work_unit.start_time, run.id 
> <http://run.id;, work_unit.priority  FROM work_unit, run, account  
> WHERE  work_unit.status = 3 AND work_unit.run_id = run.id 
> <http://run.id; AND work_unit.type != 1 AND run.status = 1 AND 
> run.account_id = account.id <http://account.id;;

what does the overall workload on the system look like when this is so 
slow?   taking over a minute to do 1820 iterations of a 3138 row index 
scan seems way out of bounds for anything other than a very heavily 
overloaded server.

is this running on a virtual machine where there are other virtual 
servers contending for the same resources ?

btw, here's your analyze formatted pretty: http://explain.depesz.com/s/XRI



-- 
john r pierce                                      37N 122W
somewhere on the middle of the left coast

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