Hi guys.
We've just made some very interesting findings concerning the use
of Solstice DiskSuite with oracle. It seems that the added layer
of devices confuses oracle greatly, and periodically causes the system
to go into a state where it is basically CPU bound, doing little to
no I/O work. This in turn causes the load average to spike (like to
the 20-25 mark) and processing to generally grind down slowly.
This problem has been seemingly baffling us for several weeks. We've
had Oracle and Sun's best tekkies in here trying to figure it out.
First Oracle says it needs more memory. Then more processors.
Sun points the finger back and says it's not the problem.
By the way, this is Oracle 7.2.2 running on a SPARCCenter 2000E with
768Megs of memory, and 6 processors.
The application is an OLTP call-center application, currently running
a maximum of about 175 users.
Has anyone else seen or heard of such a problem with the combination
of SDS and Oracle?
By the way, we sorta stumbled upon this when we decided to run the
stress test on our development server, which is not doing SDS mirroring.
The production server has 2 18Gbyte Sparc Storage Arrays, each the
complement mirror of the other.
Any ideas?/Comments?
Thanks!
Please e-mail to chase.hacker_at_mci.com
