Detail Data DR Phase Name PRE Current System Physical Memory 42949672960 -->> This is 40 GB, which is the current running memory  size. Memory that is requested to remove 34359738368 -->> This is 32 GB, which you want to remove. ProbeVue Max Pinned Memory tunable value 4294967296 -->> This is 4 GB, which is current maximum pinned memory  for ProbeVue. # probevctrl -c max_total_mem_size=3276 Attention: The command "/usr/sbin/bosboot -a" must be run for the change to  take effect in the next boot. #  probevctrl -c trace=off Attention: The command "/usr/sbin/bosboot -a" must be run for the change to  take effect in the next boot. 6.4.2 Configuration steps for ROHA In the ROHA solution, it is possible that PowerHA SystemMirror removes memory to a low  value, such as in the procedure of  Automatic resource release after OS failure . To avoid this  situation, consider the following items: Therefore, you can set the maximum pinned memory size with the command that is shown  in Table 6-9. Set it to 3276 MB, which is less than 3276.8 (8 GB*40%). This change takes effect  immediately. But, if you want this change to take effect after the next restart, you must run  /usr/sbin/bosboot -a  before the restart. GLYPH<SM590000> If you want to enable the ProbeVue component, set the maximum pinned memory less or  equal to (40% *minimum memory value of one LPAR’s profile). For ex ample, in this case,  the minimum memory size is 8 GB, so 40% is 3276.8 MB.  GLYPH<SM590000> If you do not want the ProbeVue component online, you can turn it off with the command  that is shown in Example 6-10. GLYPH<SM590000> Cluster name GLYPH<SM590000> Nodes in the cluster GLYPH<SM590000> Cluster Aware AIX (CAA) repository disk  GLYPH<SM590000> Shared volume group (VG) GLYPH<SM590000> Application controller GLYPH<SM590000> Service IP 196  IBM PowerHA SystemMirror V7.2.3 for IBM AIX and V7.2.2 for Linux This change takes effect immediately. But, if you want this change to take effect after the  next restart, you must run  /usr/sbin/bosboot -a  before the restart. After finishing all of the preparations and considerations outside of PowerHA SystemMirror,  you must configure PowerHA SystemMirror. First, you must configure some generic elements for the PowerHA SystemMirror cluster: Example 6-10 Turning off ProbeVue Example 6-9 Changing max_total_mem_size