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MALLOC_ARENA_MAX - starting with GLIBC Version 2.10 and higher, a new feature has emerged to help address memory locations and proximity to processor cores. Prior to this feature, everything stayed within one memory pool, so the data didn't get "closer" to the cores. . However, we have discovered that when fully utilized in CentOS/RHEL 6.x, this functionality can also generate negative side effects as excessive memory utilization.