Kernel Asynchronous I/O
Posted on 2005-03-22
I have ASE 12.5.3 running on Red Hat Enterprise Linux 3.0 and I would like to start using Kernel Asynchronous I/O. But log of may ASE still shows:
"Enabling (RT) Posix asynchronous disk I/O strategy.".
And it really seems, that ASE is using Posix Asynchronous I/O, because when I try to set extended cache (I have created /dev/shm acording to "ASE Large Memory Support for Linux 32.pdf" and then tried sp_configure "extended cache size", 1024) it fails and in log I see:
Large Memory feature requires Linux Kernel asynchronous disk I/O strategy.
Please fix the server to use Kernel aio or disable 'extended cache size'.
So, does anybody know, how to "fix the server" to use Kernel aio ?