984630 wrote:Actually, it is the opposite. Oracle recommends PSUs (over CPUs) since they contain CPUs (now renamed to SPUs) and they undergo rigorous testing as a whole package.
As per my knowledge, PSU should be applied only if oracle support suggests. Application owners might not want you applying PSU unless the PSU resolves a bug.
CPU is recommended. When you check for Jan 2013 CPU patches:
somewhere near the end of the page, you will come across "Risk Matrix". Depending upon the risks indicated, if the base score is above 6.5 for the components, then you definitely need to apply the CPU patch.