11G OCM Pre-Installation Checks for OMS


I am now back at step #5 of the plan in OCM 11G Planning (1):

Install the OEM Grid Control Server 10.2.0.5 on gridctrl. This should automatically install the agent as well. The repository will be in REPOS database.

Preinstallation Requirements

The Oracle® Enterprise Manager Grid Control Installation and Configuration Guide 10g Release 5 (10.2.0.5.0) recommends checking the Preinstallation Requirements.

Hardware Requirements

Recommended CPU and Memory Allocation

The deployment size is small – I expect the number of monitored targets be less than 100.

I have two (2) CPUs which is sufficient for combining OMS and OMR on the same machine.

However, the problem could be with memory. I currently have about 0.5GB free after the startup of the database instance, but there is 1GB of cached memory. Depending on the footprint of the Oracle Management Server (OMS), the file cache might be impacted.

$ cat /proc/meminfo
MemTotal:      2065852 kB
MemFree:        597008 kB
Buffers:         31996 kB
Cached:        1090536 kB
SwapCached:          0 kB
Active:         487708 kB
Inactive:       866612 kB
HighTotal:     1169920 kB
HighFree:         1668 kB
LowTotal:       895932 kB
LowFree:        595340 kB
SwapTotal:     4128760 kB
SwapFree:      4128760 kB
Dirty:              28 kB
Writeback:           0 kB
AnonPages:      231876 kB
Mapped:         156144 kB
Slab:            29240 kB
PageTables:      10096 kB
NFS_Unstable:        0 kB
Bounce:              0 kB
CommitLimit:   5161684 kB
Committed_AS:  1336800 kB
VmallocTotal:   114680 kB
VmallocUsed:      8248 kB
VmallocChunk:   105972 kB
HugePages_Total:     0
HugePages_Free:      0
HugePages_Rsvd:      0
Hugepagesize:     4096 kB

Considering Resource Allocation

Since I have everything on one (1) phyiscal disk, I am setting myself up for problems if the system starts swapping.

Operating System, Browser, Target Certification

According to MetaLink Note 412431.1, RHEL 5.0 on x86 is certified to run OEM Grid Control.

The packages listed in Required Packages on Linux all are the right levels or higher:

# rpm -qa make binutils gcc
make-3.81-3.el5
binutils-2.17.50.0.6-12.el5
gcc-4.1.2-46.el5

Software Requirements

Oracle Management Repository Software Requirements

For Enterprise Manager Grid Control with an Existing Database

However, I have to check MetaLink Note 412431.1 for compatability of the Oracle Management Repository (OMR) with the OMS since I am installing OMS with an existing database. And the note says I can use Oracle RDBMS 11.1.0.7 as the OMR.

Since the OMR is in an existing 11G database, I have to follow the procedure in MetaLink Note 467677.1. I choose to install OEM as software-only then configure later (Method 2).

Network Requirements

Proximity

Since the OMR and OMS are on the same host, I think proximity has been achieved.

Host File with Correct Host Name and IP Address

/etc/hosts does not record the hostnames of the proposed network. I have added the four (4) proposed hosts for the OCM network:

# cat >>/etc/hosts <<EOF
> 10.1.2.200 gridctrl gridctrl.yaocm.id.au
> 10.1.2.201 penrith1 penrith1.yaocm.id.au
> 10.1.2.202 penrith2 penrith2.yaocm.id.au
> 10.1.2.203 bankstwn bankstwn.yaocm.id.au
> EOF

And I had to remove the hostname and network name from the loopback address.

Server Name Dependent on the Order of the IP Address Entry

You will note that I have placed the host name first to give a shorter name for the Management Agent (OMA).

Other Requirements

Since I have already installed the RDBMS software already on gridctrl, the other requirements are satisfied.

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2 thoughts on “11G OCM Pre-Installation Checks for OMS

  1. One very important prerequisite is that the OMR must have the partitioning option installed.

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