[Boost-users] boost.interprocess dynamic segment size?

Hello, in my application I am forced to create a shared memory segment whose size can change at runtime. Is it possible to implement such a shared memory segment using the boost.interprocess library? I do not want to pre-allocate a big shared memory segment, as in most cases the segment is small (about 100bytes). Just in some very rare cases it gets very big (5MB or even more). Thank you