So what's the problem you're trying to solve?
If you simulate any database operation with OS utilities like dd you have to be
sure you're simulating it the same way as database does.
For example, Oracle opens its filesystem datafiles always with O_SYNC option
and with O_DIRECT dependent on whe
I would like to caution people about this conventional
wisdom. For UFS the I/O size tunable like maxphys ended up
as an important parameter to the write throttle algorithm.
The bigger it was the less coupled the application would be
to the storage and some important gains could come from
that.
Sa
Setting larger maxphys has in my experience made quite a difference,
depending on the target. (actually on x64 it makes it
slower). Generally, performance increases as the transfer size
increases has been my observation, for some classes of targets. This
is likely due to the target's ability to se
Richard;
Firstly, let me say that I welcome this discussion.
I was searching for comments and alternative viewpoints in the first
place and at the very least, people in the list and myself can learn and
understand the Solaris IO parameters better.
I did not make the assumption that maxphys o
