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This is before adding the "asc" index and after adding the "last_activity_at" index. The major difference is the lack of spikes, consistent RPM, better response times especially for the large course and no 500s. This test was run for 3 minutes with a small course vs large course on a 20:1 ratio. The large course used is BerkeleyX/ColWri2.2x/1T2014 (~25,000 threads, 30,000 comments) , while the small course is SMES/ASLCx/1T2015 (1700 Threads, 3047 comments).
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Checkpoint:
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At this point, it was discovered that the locust script was not correctly sending requests as intended. Rather than waiting after certain tasks, it would immediately send a new one. The RPS remains the same with the appropriate locust users which now correlate with the RPS.
Page size vs. Response time:
In a new test, it was found that SMES/ASLCx/1T2015 (1700 Threads, 3047 comments) was slowing down over time. To identify what was happening, a new course was seeded which we will call DAPI (1000 Threads, 500 comments). In the analysis of the forums, we saw that the median body size was 250 characters. Our PATCH operations can be 4, 250, 1000, 5000, or 10000 characters. This test was run over 10 hours. The decrease in response time needed to be addressed.
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NEXT STEPS:
Run with new index.
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