No update of the Optimizer statistics in the last 3 months

Hello Friends,

We are getting an alert in Live Cache alert monitor :No update of the Optimizer statistics in the last 3 months, in APO system.

APO system database on DB2 and Live cache on SAP DB. I have no idea on SAP DB Optimizer statistics.

Suppose, if  No update of the Optimizer statistics  running in the system , any drawbacks

i have found below link related to this ,, but i am not 100% sure how to proceed

http://help.sap.com/saphelp_nw04/helpdata/en/56/e84afcac4c3d469719039d72528ff0/content.htm

any help?

regards,

Balaram