Solution : https://service.sap.com/sap/support/notes/694810 (SAP Service marketplace login required)
Key words :
`show parameter filesystemio_options` sql, os native asynchronus functionality, aix 5l reason, prerequisites aix 5l, terms filesystemio_options asynchronus, 3- dirctio -> oracle recommends, directio disables asynchronous, os asynchronus, filesystemio_options parameter, command show
Related Notes :
| 830264 | FILESYSTEMIO_OPTIONS has a useless value |
| 793113 | FAQ: Oracle I/O configuration |