Determining Cpu Requirements; Secure Sockets Layer Impact On Cpu Requirements; Determining Memory Requirements - Oracle Oracle9i Application Manual

Determining CPU Requirements

For most applications, the majority of the CPU utilization is spent in processing the
application's code. The CPU requirement of any application depends on its
complexity and workload, as shown in
You will need to monitor the CPU requirements of applications throughout the
development cycle. See
on how to do this.
Table 3–2 Application CPU requirements
Application
Static page, 20K
Simple servlet, JDK 1.2
Simple servlet, JDK 1.1.8
Medium application
Complex application

Secure Sockets Layer Impact on CPU Requirements

Secure Sockets Layer (SSL) is a protocol used for transmitting documents securely
over the Internet. URLs for Web pages that require an SSL connection begin with
https instead of http.
Establishing an SSL connection is costly in terms of response time and CPU
utilization. For example, a request with a response time of 0.5 seconds without SSL
generated a response time of 1.7 seconds with SSL (measured on an internal 100
Mbps network). Most of the performance cost in using SSL is in establishing the
connection (approximately 125 ms of CPU time per connection on a 336 Mhz
processor).
The high connection cost is incurred for the first connection in a client's SSL session,
because the HTTP Server can cache the SSL session information, reducing the
overhead for subsequent connections. For more information, see
Caching"

Determining Memory Requirements

This section discusses memory requirements for the following components:
Chapter 2, "Monitoring Your Web Server"
on page 4-10.
Determining Memory Requirements
Table 3–2.
CPU requirement
(per request)
5 ms
20 ms
40 ms
100-200 ms
400-600 ms
Sizing and Configuration 3-3
for information
"SSL Session