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New Redhat ipcmni_extend setting Recommendation in the DB2 Infocentre

Hello, Db2 Luw seems to be a victum of Redhat change

The change is effective of Redhat 7.8+, where you need to set ipcmni_extend to allow db2 to request more then 32k of MSGMNI as per


to recommend setting ipcmni_extend setting like vm.overcommit_memory=0

  • Avatar32.5fb70cce7410889e661286fd7f1897de Guest
  • Jun 22 2020
  • Future consideration
Who would benefit from this IDEA? DB2 remains stable
How should it work?

1) Solution to Problem .

IBM InfoCentre to recommend setting

$ su -

$grubby –grub2 –args="ipcmni_extend" –update-kernel=$(grubby –default-kernel)

$grubby –info=$(grubby –default-kernel)|grep args

# Check for ipcmni_extend

Reboot server

$su -

$grubby –info=$(grubby –default-kernel)|grep args

# Check for ipcmni_extend.

Note, changing grubby on Redhat 8+ is different .

Idea Priority Urgent
Priority Justification Change of Operating system kernel that effects DB2 stability
Customer Name Brian Walker
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