Webcache Performance Impact and High CPU Utilization When SSL is Used Without KEEPALIVE
Last updated on JULY 03, 2017
Applies to:Web Cache - Version 10.1.2 to 10.1.2.3.0 [Release AS10gR2]
Information in this document applies to any platform.
Have not been tested against FMw 11g WebCache, but may apply..
You are conducting simple load testing against Web Cache, attempting to determine the throughput or concurency 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.
You may have recently added SSL into your load testing.
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