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4.4.3 meminfo

This hook adds extra fields to each measurement block describing the amount of used and free memory as reported by /proc/meminfo. The new fields are: MemTotal, MemFree, MemShared, Buffers, SwapTotal, and SwapFree. You can use this hook to see if the program is leaking memory or just to measure the memory usage of various workloads. To enable, set the environment variable MEASURE_MEMINFO.