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Results

As with everything else, the proof is in the numbers. The following examines the actual results from multiple TPC-C runs on the test systems using both RAID and SSD infrastructures.

The results showed clearly that in a CPU driven system with the full database cached the performance of the system is dependent on the number, speed, and capacity of the CPUs and the latency and bandwidth of the interconnect. Look at the comparison between the two setups (RAID and SSD) in a fully cached state in Figure 4.3.

This figure illustrates how the transactions per second (TPS) are virtually identical with the same maximum TPS inflection point for both the RAID and SSD system configurations. This demonstrates that as the database becomes fully-cached the response of the system is less dependent on the I/O subsystem and more dependent upon the memory and CPU and in the case of real application clusters, the speed of the interconnect.

Next will be an examination of the results for each interface: RAID and SSD.


The above book excerpt is from:

Oracle RAC & Tuning with Solid State Disk

Expert Secrets for High Performance Clustered Grid Computing

ISBN 0-9761573-5-7

Donald K. Burleson & Mike Ault

http://www.rampant-books.com/book_2005_2_rac_ssd_tuning.htm

  
 

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