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List:       sqlite-users
Subject:    Re: [sqlite] SQLite Transaction Rate and speed...
From:       Nuzzi <nuzzi () smokemytool ! com>
Date:       2009-03-06 21:10:31
Message-ID: 22380540.post () talk ! nabble ! com
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ken-33 wrote:
> 
> 
> 
> look at the sql syntax for insert or replace for sqlite. 
> 
> Also you goal to handle 1 million per minute is probably going to be
> dependant upon your hardware. 
> 
> For instance throughput greatly increases with disk striping. 
> 
> Also the faster the RPM of the drive the more transactions can be
> processed. Code it up and find out!
> 
> 

I have actually coded it up.  The way I am currently doing it is sending the
data to a function (the data is 3 doubles) and in that function doing a
SELECT to get the data currently in the DB, then updating the data, then
UPDATE or INSERT.  The SQL calls are compiled statements with binds, etc. 
It is woefully slow.  I was kind of hoping that maybe I was missing a step
or just unfamiliar with the best techniques. I know that when adding a lot
of data with the BEGIN and END TRANSACTION things speed up considerably, but
I can't use it in my case (I don't believe) because the UPDATE depends upon
the data in the SELECT.

John

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