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Re: So how big is your buffer cache ?

From: Nuno Souto <nsouto_at_bizmail.com.au>
Date: Tue, 31 Aug 2004 21:19:06 +1000
Message-ID: <00c801c48f4c$5aa75a20$f5fef63c@DCS005>


How does "executed 3000000 times a day" strike you then? Just got one.... and had to explain why it was not a good idea to write a batch Java process as a loop of: objtype objvar = new objtype(PK);
and let the constructor method do the same SQL for every row! Sometimes I wonder if God ran out of brains when He was making the Java developer....
Cheers
Nuno Souto
nsouto_at_bizmail.com.au
----- Original Message -----
From: "Cary Millsap" <cary.millsap_at_hotsos.com>
> bad SELECT statement can have the same effect. A SQL statement that =
> reads
> 10,000x as many PIO blocks as it needs, executed thousands of times per =
> day,
> results in a much busier I/O subsystem than you need. A busy I/O =
> subsystem
> makes it more difficult for DBWR to keep up, and this causes 'free =
> buffer
> waits' waits.



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Received on Tue Aug 31 2004 - 06:14:59 CDT

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