GLIBC causing slow processing / high CPU utilization

Solution Unverified - Updated -

Environment

  • Red Hat Enterprise Linux 6.3
  • glibc-2.12-1.80.el6_3.5.x86_64
  • glibc-2.12-1.107.el6.x86_64

Issue

  • When upgrading from RHEL 6.3 to 6.4 code ran noticeably longer, sometimes up to a factor two longer.

Resolution

Root Cause

  • The issue was tracked down to serious CPU time regressions in the glibc math library.

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