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What is Performance Tuning?
1-6 Oracle HTTP Server powered by Apache Performance Guide
Effects of Excessive Demand
Excessive demand increases response time and reduces throughput, as shown in
Figure 1–4. If there is any possibility of the demand rate exceeding the achievable
throughput, a demand limiter (such as MaxClients in the Oracle HTTP Server and
security.maxConnections in JServ) is essential. Look at the possible demands that
may be placed on the system and design the application or configure the system
with these constraints in mind.
Figure 1–4 Increased Demand/Reduced Throughput
Adjustments to Relieve Problems
Performance problems can be relieved by making adjustments in the following
areas:
unit consumption Reducing the resource (CPU, memory)
consumption of each request can improve
performance. This might be achieved by
pooling and caching.
functional demand Rescheduling or redistributing the work
will relieve some problems.
capacity Increasing or reallocating resources (e.g.,
CPUs) relieves some problems.