linux - RAM usage after program loading - mismatch with TOP statistics -


i have expected after running program top utility show memory (virt column) used program equal or greater size on disk. surprised when result different - file size on disc turned out greater top 1 showed. explain wrong in expectations.... p.s. application native built gcc.

not parts of executable file mapped memory when run it.

if examine executable readelf -ws <executable> (assuming elf executable format) can see list of file sections. sections flag a (alloc) loaded.

sections starting .debug, example, not mapped, unless runs under debugger, , these sections largest.


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