Red Hat Linux introduced a change in glib 2.11 that creates larger per-thread address spaces aligned at 64MB. This change results in a virtual process size much larger than those seen in previous versions of glibc. This is not considered a bug by RedHat, as noted in, and does not affect the physical memory needed by the server process. To see the version of glibc on your system, use the command yum info glibc.