From: Pierre C <lists@peufeu.com>
To: pgsql-performance@postgresql.org, "shaiju.ck" <shaiju.ck@gmail.com>
Subject: Re: Select * is very slow
Date: Mon, 08 Nov 2010 19:41:53 +0100
Message-ID: <op.vlu7j3h2eorkce@apollo13> (raw)
In-Reply-To: <1289197016462-3254568.post@n5.nabble.com>
References: <1289197016462-3254568.post@n5.nabble.com>
> The table have 200 records now.
> Select * from employee takes 15 seconds to fetch the data!!!
> Which seems to be very slow.
> But when I say select id,name from empoyee it executes in 30ms.
30 ms is also amazingly slow for so few records and so little data.
- please provide results of "EXPLAIN ANALYZE SELECT id FROM table"
- huge bloat (table never vacuumed ?) => VACUUM VERBOSE
- bad network cable, network interface reverting to 10 Mbps, badly
configured network, etc ? (test it and test ping to server, throughput,
etc)
- server overloaded (swapping, etc) ? (vmstat, iostat, top, etc)
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To: pgsql-performance@postgresql.org
Cc: lists@peufeu.com, shaiju.ck@gmail.com
Subject: Re: Select * is very slow
In-Reply-To: <op.vlu7j3h2eorkce@apollo13>
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