Oracle's Metalink is a very - veryyy useful tool when it comes to errors and warnings and unanswered question. Oracle got a huge and helpful documentation.
But.. if you are searching for a patch or patchset you're in trouble.
this afternoon i was trying to download a patch to upgrade my rdbms 220.127.116.11 to 18.104.22.168 ... and i searched for a patchset for 22.214.171.124 . There came swarm of results. But couldnt find anything about my upgrade issue!! Then i gave a try to search with 126.96.36.199 . Aaaaanddd it was there! at last..
Isnt it silly to make the patchset search based on the new number? i am trying to upgrade the old number dummy!( maybe this is only weird for me because im not a oracle guru, i'm just an inexperienced dba)