If you are using Oracle Universal Content Management PS3 (18.104.22.168.0) and are experiencing some search performance woes you might be surprised to find out that the search cache is turned off by default. This seems to be a known issue that is being addressed for the next patch set. In the mean time, you can turn it on by editing your config.cfg file located here:<WLS path>/user_projects/domains/<UCM domain>/cs/config/config.cfg
Add the following entry:
Save and restart your content server.