Quick one today!
Having message below in your 11.2.0.3 on AIX like this?
WARNING: Heavy swapping observed on system in last 5 mins. pct of memory swapped in [31.28%] pct of memory swapped out [3.81%]. Please make sure there is no memory pressure and the SGA and PGA are configured correctly. Look at DBRM trace file for more details.
Stand down, this issue is caused by unpublished Bug 11801934, mentioned in MOS False Swap Warning Messages Printed To Alert.log On AIX (Doc ID 1508575.1).
Basically happens because the v$osstat does not reflect proper stats for the swap space paging.
So, stay calm and see you next week!
