billmathews2013 wrote:
vCenter is a VM, with 8GB of RAM and 4 vCPUs assigned. It's vmdk lives on our fibrechannel SAN. Performance stats on that VM show no problems.
Our hosts are Dell PowerEdge R720s, two 8 core Intel(R) Xeon(R) CPU E5-2650 0 @ 2.00GHz, 128GB RAM, disk is fibre channel SAN
Our database server is a Sun/Oracle 890, 64GB RAM, disk via fiber channel. Runs Oracle 11g
OK, so we can rule out disk performance, that only leaves Oracle performance. WE can be here all day trying to diagnose what could be wrong. Best thing for you to do is look up oracle performance tweak.
How important is the performance? Is it really bad or just lower than what you think it should be?
There are numerous things that can be done, Oracle has it's own memory management, separate from the OS. Is Oracle running in Windows or Linux? You will have to do some reading, it's easy to find. Once you get a few hits you will be able to narrow the problem down. Windows is slower Oracle performance vs Linux but it's easier to tune. Linux is much better, but if you don't know Linux it can be a real pain to figure out what parameters then restart Oracle. They can both be done via the web for Oracle, but some parameters may require modification of certain files...
I don't remember the exact parameters or proper memory, but Orace is a custom DB for tailored for memory. If you have 8GB of RAM, you have to change Oracle to use 8GB of memory it doesn't autoset (yeah you pay a million dollars for Oracle and it can't even tune itself??!) Oracle is nuts, they WANT you to pay a Oracle DB to setup Oracle, that's how it works. Short of that, you have to start googling.
Unless someone else responds to this post and maybe can give you a head start.. it WILL require a restart of Oracle (more than 1) and LOTS of tweaking I can assure you.