Re-evaluating

 

As with all performance-related work, tuning will be required. The goals are to eliminate bottlenecks, scale to a manageable status for those that cannot be eliminated, and work around those that cannot be scaled. Some examples of tuning actions and the benefits realized are:

1. Increasing Web server threads raises the number of requests that could be processed in parallel.

2. Adding indexes to the data server reduces I/O bottlenecks.

3. Changing the defaults for several operating system variables allows threaded applications to use more heap space.

4. Caching significantly reduces the number of requests to the data server.

5. Increasing the number of edge/appliance servers improves load balancing.

6. Upgrading the data server increases throughput.

Such results demonstrate the potential benefits of systematically applying scaling techniques and continuing to tune.

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IBM is a trademark of the IBM Corporation in the United States, other countries, or both.