tcmalloc to release memory

After testing, the occupied memory is not released by using tcmalloc

Install tcmalloc:
following the construction on : https://centos.pkgs.org/6/atomic-x86_64/gperftools-libs-2.0-11.el6.1.art.x86_64.rpm.html

Use construction:

  https://blog.csdn.net/u011217649/article/details/77683126

  Use the tcmalloc allocator
  http://www.riptutorial.com/tensorflow/example/13427/use-the-tcmalloc-allocator

Useful notes:
Python 进程内存增长解决方案
https://blog.csdn.net/BaishanCloud/article/details/76422782

  https://blog.csdn.net/xiejueheng/article/details/45798381