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High CPU Utilization
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Huong Nguyen Posts: 69
7/20/2011
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Hi Vadim,
The CPU graph keeps on increasing. SS's option is to purge response body for non-errors. In my test for 256 SS, there were 2 errors, 582 total timeout. Initially, I ran SS with wireshark in the background. Then, halfway through the test, I closed wireshark. I expected the CPU usage to drop, but it keeps on increasing. http://screencast.com/t/gyNm1JAadYr.
Previously, with 128SS, the graph looked like this: http://screencast.com/t/BH6mOC4iVLi. The 2 graphs doesn't look similar so I can't compare. For the 256, the ramp up is 1 user every 2 seconds, until 256 users. The 128 users test, the ramp up is 1 user every 4 seconds, until 128 users.
Can you tell me the reasons for the increasing CPU utilization? How do I know if it's a code-based change that caused it or it was just due to the increase in virtual users? What I should look into? Etc.
Thank you in advance.
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