Please give details. I got an explain from PGAdmin,
as follows
"GroupAggregate (cost=28927.37..35594.39 rows=156871 width=24)"
" -> Sort (cost=28927.37..29319.55 rows=156871 width=24)"
" Sort Key: docacctransactions.accgroupid, docs.docid, docs.docdate"
" -> Hash Join (cost=3337.89..12170.02 rows=156871 width=24)"
" Hash Cond: (docacctransactions.docid = docs.docid)"
" -> Seq Scan on docacctransactions (cost=0.00..3665.71 rows=156871 width=20)"
" -> Hash (cost=2545.06..2545.06 rows=48306 width=8)"
" -> Seq Scan on docs (cost=0.00..2545.06 rows=48306 width=8)"
Can you please give why there is a time difference?
CPK
It may be worth-wile to generate an explain plan
http://www.postgresql.org/docs/8.3/interactive/sql-explain.html
From: pgsql-admin-owner@xxxxxxxxxxxxxx [mailto:pgsql-admin-owner@xxxxxxxxxxxxxx] On Behalf Of c k
Sent: Thursday, August 21, 2008 2:49 PM
To: pgsql-general@xxxxxxxxxxxxxx; pgsql-admin@xxxxxxxxxxxxxx
Subject: [ADMIN] Query performance difference
Hello,
I have a question regarding query performance from two pgsql applications. PGadmin III 1.8 and Navicat for postgresql 8. Both connected to same server on local machine 8.3 and runs a same query for appox. 1,60,000 rows with one min, one max and addition of the min and max values on two tables joined on an integer column gives different query execution times with noticible difference. PGAdmin gives 9350ms and Navicat gives 2110ms. Why? What will be the difference?
Is it in their query execution methods, with/without indexes etc?.
Thanks
CPK
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