Oracle EBS is patehtically working on VM Ware although it has same specs as of physical machine.

[faizanmehboob]

Hi Everyone,

We are running Oracle EBS on Physical machine having specs as follows:

DB

X2 Quad Core Xeon 2.4 GHz

32 GB RAM

x2 146GB SAS Drive with RAID-1 for OS

SAN HDD x10 450GB SAS 15K i.e. 4.0TB but RAID-5 implemented (2.3TB allotted to DB)

x4 NIC but 1 NIC used 10/100/1000

Apps

X2 Quad Core Xeon 2.4 GHz

32 GB RAM

x2 146GB SAS Drive with RAID-1 for OS

SAN HDD x10 450GB SAS 15K i.e. 4.0TB but RAID-5 implemented (500GB allotted to Apps)

x4 NIC but 1 NIC used 10/100/1000

We are facing serious issues when migrated Oracle EBS on vmware infrastructure.

Issue are related to high I/Os and high CPU usage hence performance of the application gets down badly whereas same application on physical machine working fine. We would also like to share physical machine is with lesser specification.

Following are specs of Oracle & VM Ware machine;

Oracle EBS is with 11g v1.1.07 Database and R12 v12.1.3 Apps

OS for above applications is RED HAT Enterprise Linux 5.5 64bit

ESXi version 5.5.0 build 1331820

Hope to have a positive reply.

[Linjo]

How are the specs of the virtual infrastructure and the virtual machines?

Is this a dedicated environment or shared with other workloads?

[faizanmehboob]

Hi Linjo,

Thank you for your response.

VM MAchine specs are as follows:

(There are two servers, everything is same except local storage.)

Both servers are HP DL 585 G7 server with;

Quad AMD Opteron Processor 2.5GHz

12GB RAM

x8 NIC

Local-1 HDD x8 600GB SAS 10K i.e. 5.4TB, RAID-5 implemented

Local-2 HDD x10 900GB SAS 10K i.e. 7.2TB, RAID-5 implemented

SAN

SAN-1 HDD x6 600GB SAS 15K i.e. 2.4TB but RAID-5 implemented

SAN-2 HDD x6 2TB SAS 7.2K i.e. 8TB but RAID-5 implemented

Yes, it is a shared environment, like we have other machines are running on VM but we have dedicated cores & memory for EBS Apps & DB servers.

[Linjo]

So the virtualized environment have less then half the memory? Not really a fair comparison... Maybe it is swapping a lot?

What are the sizing recommendations from Oracle?

// Linjo

[faizanmehboob]

Hi Linjo,

It actually went from lowest to highest...

EBS Scenario (In this case, cores weren't dedicated)

Initially we started with 8 vCPUs. Then raised vCPUs as 12, 28, and 24. Where RAM was 24GB, 32GB, and 42GB respectively.

Then we dedicated Cores.

Whereas also tried same after dedicating storage but results were same.

Done the same thing with APPS & DB but same results. Even after dedicating 42 GB of RAM, it still has I/Os CPU utilization issue...

As I have stated, we have started with initial 12 GB, we thought that increasing memory will work but the more resources we give to machine, the more it becomes thirsty 🙂

Don't know about oracle but As per vendor, we have done best practices...

We also have changed the storage from 'thin' to 'thick' but same....

[faizanmehboob]

Hi Linjo,

Just checked out & CPU should be as low as possible, recommended from Oracle.