hi,David my database : RHAS 2.1(2.4.9-E37) + 9204 RAC . when i use AIO , it cause memory error and some datafile offline then the instance crash. this appear twice per month . after open iTAR and oracle advise us do not use AIO . now my database is ok. i do not know how about the RHAS 3.0 . Best regards msn: biti_rainy@xxxxxxxxxxx a dba from alibaba(china) ---- from the mail----- >Has anyone here evaluated aio and/or IO slaves on Linux RHAS 3? >Are the implementations stable and do they perform well? >Were running 9205 RAC. >Thanks >-- >.. >David > >-- >//www.freelists.org/webpage/oracle-l > >. -- //www.freelists.org/webpage/oracle-l