Analyze transaction time and correlation with rails controller time
Related to checking out performance #1830 (closed)
- Find out what is actually measured by "transaction timing" at global level, and then also at Rails controller level.
- See if we can reconstruct global transaction timing (mean, p95, p99) using mean, p95, p99 data on timings for individual Rails controller calls. They should correlate to each other, they may not correlate to end-user experience of timing.