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<h1>19. TPC C Benchmark Kit</h1>
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<h2>19.4. Omissions, Exceptions from the Definition</h2>
<p>
Running the benchmark by the book is a complex and costly process which
requires hardware and software that is not commonly available.
</p>
<p>
To measure tpmC rates that are directly comparable with published figures
the benchmark must comply with the scaling rule of a maximum of 12.5 tpmC
per warehouse. Therefore to measure 1250 tpmC, one must have a database
of 100 warehouses, approximately 10 GB.
</p>
<p>
Obtaining a good figure will require the maximum RAM configuration of
the platform in question.
</p>
<p>
One will further remember the 180 day rule which states that the
disk configuration quoted in the pricing section must be large enough
to accommodate 180 8 hour days worth of new orders coming in at the
reported rate.
</p>
<p>
The number of users will also be large, e.g. 1000 users for the 1200
tpmC result, based on 10 terminals per warehouse.
</p>
<p>
Almost all published results have been obtained with a transaction
monitor, typically Tuxedo.
</p>
<p>
Note that the driver in this kit initiates a new transaction as soon
as the previous one is completed. The correct behavior is to generate
transactions at a basically constant rate, load being increased by adding
clients and a new warehouse every 10 clients.
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The complete benchmark specification is available
at <a href="http://www.tpc.org/">the TPC Web Site</a>.
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