Webcache Performance Impact and High CPU Utilization When SSL is Used Without KEEPALIVE (Doc ID 342514.1)

Last updated on SEPTEMBER 11, 2024

Applies to:

Symptoms

You are conducting simple load testing against Web Cache, attempting to determine the throughput or concurrency levels that can be sustained against a simple (2K) HTML page while using SSL and find that the concurrency and throughput are dramatically lower than expected.

For example, testing the same page against Web Cache without using SSL, you established the baseline of around 300 requests/second while CPU utilization on the system remained at or below 70%. However, when conducting the same test using SSL, the throughput dropped to 8 requests/second with CPU utilization exceeding 90%.

Your load testing is being conducted either by a live user community using a Microsoft Internet Explorer browser or a load testing tool that emulates Internet Explorer as it's UserAgent.

Users may also see poor performance when accessing applications such as Oracle Portal pages using Internet Explorer after enabling SSL.

Changes

You may have recently added SSL into your load testing.

Cause

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