Running DB2

Reducing the DB2 Process Startup Times

In some instances the startup times of the DB2 processes can be excessive when using DB2 8.x under LifeKeeper protection. Making the following change to the kernel network parameters can improve this situation. Add the following line to the_ /etc/sysctl.conf_ file on each LifeKeeper clustered system that will be running DB2 8.x:

net.ipv4.tcp_syn_retries=1

Then running sysctl –p will cause this change to take effect.

Preventing Frequent DB2 Instance Crashes (Panic)

If a LifeKeeper protected DB2 instance is encountering frequent crashes in a systemd environment (RHEL7, CentOS7, OEL7) then altering the automatic IPC cleanup configuration parameter may correct this issue. On each node in the LifeKeeper cluster, set the following configuration parameter in the /etc/systemd/logind.conf file.

RemoveIPC=no

Then, execute systemctl restart systemd-logind to make this change effective. Click here for more details.