How to correctly deallocate or delete a c++ vector?

Question

I have a weird problem with vector in C++..

I created a vector and inserted 10000 integer values into it and have checked the memory utilization. It is 600 kb. But after

Answer 1

The only way to really get rid off unused memory in a std::vector<> pre C++11 is to swap it with an empty vector: vector().swap(myvec). In C++11 you have a member function shrink_to_fit which often is implemented as the swap idiom just mentioned.