A new user to pgio (The SLOB Method for PostgreSQL) reached out to me with the following comment:  I’ve been testing with pgio but when I compare I/O monitored in iostat output it does not match the pgio output for physical reads.  The user is correct–but that’s not the fault of pgio. Please allow me … Continue reading So pgio Does Not Accurately Report Physical I/O In Test Results? Buffering Buffers, and Baffles.