Using BPFtrace to trace PostgreSQL vacuum operations enables engineers to quickly troubleshoot and fix issues in production by providing visibility into the execution time of these critical database operations. By leveraging eBPF technology, a high-level tracing language for Linux eBPF, users can create programs with only a few lines of code to observe the invocation and exit of functions in PostgreSQL, such as vacuum calls. The tool allows engineers to measure and print their execution times, providing valuable insights into the performance of their database operations. Additionally, BPFtrace enables the capture of function parameters, including Oids and relation names, which can be used to further analyze and optimize vacuum operations. By utilizing BPFtrace, developers can create custom tools to monitor and improve the performance of PostgreSQL vacuum calls, leading to better overall system performance and reliability.