Dear list,
Our shop is running Solaris 2.6, Oracle database
8.0.6 and Veritas VxFS file system. At present, all database file access thru
the file system buffer cache, we decided to use the direct I/O mount option with
VxFS for performance reason. There is one issue I am not sure about and hope
someone on the list can give me a pointer, access database file thu the file
system buffer cache gives us "read ahead" advantage, with direct I/O I
think what you read is what you get (no read ahead functionality), is this an
issue?? If it is an issue, how do you deal with it?? WIth file system buffer
cache, I think the database block size should be the same as file system
buffer size and file system block size is irrelevant to how much system read or
write, is this still true under direct I/O, I am not sure what dictate how much
data to read or write??
KC
Received on Wed Jun 27 2001 - 07:52:24 CDT
