Comment 3 for bug 1110561

Another one (much higher sys):

Events: 632K cycles
 58.11% [kernel] [k] _spin_lock
  4.58% mysqld [.] my_regcomp
  3.22% mysqld [.] 0x54b935
  1.15% libc-2.12.so [.] _int_malloc
  0.93% libc-2.12.so [.] memcpy
  0.91% mysqld [.] yaSSL::buildFinished(yaSSL::SSL&, yaSSL::Finished&, unsigned char const*)
  0.78% mysqld [.] ha_partition::change_partitions(st_ha_create_information*, char const*, unsigned l
  0.76% mysqld [.] create_fromuni
  0.52% [kernel] [k] intel_idle
  0.50% mysqld [.] MYSQLparse(void*)
  0.50% mysqld [.] row_purge_remove_sec_if_poss_leaf
  0.49% [kernel] [k] schedule
  0.44% libc-2.12.so [.] _int_free
  0.41% mysqld [.] row_purge_node_create
  0.41% [kernel] [k] copy_user_generic_string
  0.38% mysqld [.] ha_partition::truncate_partition(Alter_info*, bool*)
  0.35% libc-2.12.so [.] malloc