Excerpt from the ML notes.
IBM suggestions the following AIX related advices:
1. set AIXTHREAD to S on /etc/environment.
2. " ioo -o maxpgahead=256 " to set maxpgahead parameter
Initial settings were : Min/Maxpgahead 2 16
3. " vmo -o minfree=360 -o maxfree=1128 " to set minfree and maxfree...
Initial settings were : Min/Maxfree 240 256
The goal of setting those parameters would be Getting %15-20 performance improvements on RMAN backup performance on AIX 5L Based Systems.