RE: Anyone Running 9.2.0.8 Database on T4?
- From: "Jorgensen, Finn" <Finn.Jorgensen@xxxxxxxxxxxxxxxxx>
- To: "stojan.veselinovski@xxxxxxxxx" <stojan.veselinovski@xxxxxxxxx>, ORACLE-L <oracle-l@xxxxxxxxxxxxx>
- Date: Thu, 9 May 2013 13:16:00 -0400
Yep I've got a few of those (as sad as that is) but I only use T4's for
dev/test databases so far. The biggest problem has been that with the hyper
threading the CPU_COUNT parameter becomes something like 128 depending on your
server configuration which leads to derived parameters having very large
values. In many cases that meant PQ statements used hundreds of threads and in
at least one case a database couldn't be opened without log_buffer being 100MB+
until CPU_COUNT was set to a lower value.
Thanks,
Finn
-----Original Message-----
From: oracle-l-bounce@xxxxxxxxxxxxx [mailto:oracle-l-bounce@xxxxxxxxxxxxx] On
Behalf Of Stojan Veselinovski
Sent: Thursday, May 09, 2013 4:19 AM
To: ORACLE-L
Subject: Anyone Running 9.2.0.8 Database on T4?
Hi all,
Anyone out there running a 9.2.0.8 db on T4?
We are seeing a bit more CPU usage after our migration from the E25K. It was
quite problematic in the first week where we had a number of statements burning
cpu spinning for latches.
These sql's have been tuned and we've managed to stabilise performance but we
tend to see a few more spikes here and there post migration.
We have migrated a number of databases onto the T4 and this is the only one
that has regressed.
Regards - Stojan.
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