Wiwat,
You should make sure that you have read the Best Practices Guide and the
Evil Tuning Guide for helpful information on optimizing ZFS for Oracle.
There are some things you can do to tweak ZFS to get better performance
like using a separate filesystem for logs and separating the ZFS intent
log (ZIL) from the main pool.
They can be found here:
http://www.solarisinternals.com/wiki/index.php/ZFS_Best_Practices_Guide
http://www.solarisinternals.com/wiki/index.php/ZFS_Evil_Tuning_Guide
Also, what kind of disk subsystem (number of disks, is it an array?,
etc.) and how do you have your zfs pools configured (raid type, separate
ZIL, etc.)?
Hope this gives you a start.
-Ed
Wiwat Kiatdechawit wrote:
I implement ZFS with Oracle but it slower than UFS very much. Do you
have any solution?
Can I fix this problem with ZFS direct I/O. If it can, how to set it?
Wiwat
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