IO issues on Red Hat Linux SAN storage and veritas volume manager

Question

Oracle 11.0.1.7:
We recently moved from Solaris Sparc box to linux box and since then we are seeing IO issues. And it's quite obvious in iostat that the io goes as high as 100ms. So I am wondering if someone can advice if there are any mount options we need to give or if we need to use vxodmfs file system. Below are the details of this environment:
1. It's using veritas volume manager. (Same as solaris)
2. It's using vxfs file system (Same as solaris)
3. It's using veritas ODM libraries that helps us in IO. (Same as solaris)
4. SAN EMC storage (Same as solaris)
5. Mount options /dev/vx/dsk/orapdata1dg/oradata1vol1 on /u01/oradata type vxfs (rw,delaylog,largefiles,ioerror=mwdisable)
Edited by: user628400 on Aug 7, 2009 5:48 PM

Answer 1

Not sure if this really applies here but, from Metalink note 359515.1, parameters should be like follows on NAS devices:
Linux x86 #*      
Mount options for Binaries
rw,bg,hard,nointr,rsize=32768,
wsize=32768,tcp, vers=3,
timeo=600, actimeo=0
Mount options for Oracle Datafiles
rw,bg,hard,nointr,rsize=32768,
wsize=32768,tcp,actimeo=0,
vers=3,timeo=600      
Linux x86-64 #*
Mount options for Binaries
rw,bg,hard,nointr,rsize=32768,
wsize=32768,tcp,vers=3,
timeo=600, actimeo=0      
Mount options for Oracle Datafiles
rw,bg,hard,nointr,rsize=32768,
wsize=32768,tcp,actimeo=0,
vers=3,timeo=600
Give it a try and let us know....
Edited by: JRodriguez on Aug 10, 2009 6:35 PM