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A First Technical Look At Hybrid Cloning in EM12c Release 5

The sales, support and technical teams were brought into the Denver Tech Center office to do some advanced training in Hybrid Cloud.  There were many take-aways from the days we spent in the office, (which is saying a lot-  most of you likely know how much I hate working anywhere but from home… :)) and I thought I would share a bit of this information with those th

12.1.0.5 Hybrid Cloud Cloning

Last week’s release of 12.1.0.5 was a pleasant surprise for everyone out in the Oracle world.  This release hit the bulls-eye for another cloud target of Oracle’s, announcing the introduction of Enterprise Manager 12c’s offering a single pane of glass management of the hybrid cloud.

Oracle Enterprise Manager Cloud Control 12c Release 5 (12.1.0.5) : My first two installations

em-12cI’ve done a couple of play installations of EM12c 12.1.0.5, just to get a feel for it. You can see the result of that here.

From an installation perspective, everything was pretty similar to the previous releases. I tried the installation on both OL5 and OL6, in both cases using 12c as the database repository. No dramas there.

A couple of things of note.

  1. The 12c repository template database is a Non-CDB architecture.
  2. The Weblogic installation uses Java6.

Interesting…

EM12c : Login to GUI with the correct password causes authentication failure

So the other day I was trying to log in to my EM12c R4 environment with the SSA_ADMINISTRATOR user, and I got the error:

“Authentication failed. If problem persists, contact your system administrator”

I was quite sure that the password that I had was correct, so I tried with the SYSMAN user and had the same error. I still wanted to verify that I had the correct password , so I tried with the SYSMAN user to log in to the repository database, and was successful, so I know something was wrong there.


SQL> connect sysman/
Enter password:
Connected.

So I went to the/em/EMGC_OMS1/sysman/log/emoms.log and saw the following error

EM12c : Login to GUI with the correct password causes authentication failure

So the other day I was trying to log in to my EM12c R4 environment with the SSA_ADMINISTRATOR user, and I got the error:

“Authentication failed. If problem persists, contact your system administrator”

I was quite sure that the password that I had was correct, so I tried with the SYSMAN user and had the same error. I still wanted to verify that I had the correct password , so I tried with the SYSMAN user to log in to the repository database, and was successful, so I know something was wrong there.


SQL> connect sysman/
Enter password:
Connected.

So I went to the/em/EMGC_OMS1/sysman/log/emoms.log and saw the following error

EM12c : Login to GUI with the correct password causes authentication failure

So the other day I was trying to log in to my EM12c R4 environment with the SSA_ADMINISTRATOR user, and I got the error:

“Authentication failed. If problem persists, contact your system administrator”

I was quite sure that the password that I had was correct, so I tried with the SYSMAN user and had the same error. I still wanted to verify that I had the correct password , so I tried with the SYSMAN user to log in to the repository database, and was successful, so I know something was wrong there.


SQL> connect sysman/
Enter password:
Connected.

So I went to the/em/EMGC_OMS1/sysman/log/emoms.log and saw the following error

SQL ID Specific Performance Information

When you need to have information about one SQL_ID and don’t need everything and the kitchen sink, there are a few different ways to collect this via Oracle.  I’m surprised how rarely this is covered in performance tuning/optimization, (whatever the current “acceptable” term is for fixing a database when there are performance issues arise… J)  classes, manuals and documentation.

Re-Adding a Database to the AWR Warehouse Without Losing Historical Snapshots

There may be a reason that one needs to re-add a database to the AWR Warehouse.  This is a new opportunity for me to learn and offer assistance, but I’m working off the grid to figure out a solution.  Luckily, it’s just a matter of creating a new process from pre-existing code and processes.

Quick Tip : Oracle User Ulimit Doesn’t Reflect Value on /etc/security/limits.conf

So the other day I was trying to do a fresh installation of a new Oracle EM12cR4 in a local VM,  and as I was doing it with the DB 12c, I decided to use the Oracle preinstall RPM to ease my installation of the OMS repository database. Also I was doing both the repository and EM12c OMS install in the same VM, that is important to know.

[root@em12cr4 ~]# yum install oracle-rdbms-server-12cR1-preinstall -y

I was able to install the DB without any issues, but when I was trying to do the installation of EM12cR4, an error in the pre-requisites popped up:

WARNING: Limit of open file descriptors is found to be 1024.

For proper functioning of OMS, please set “ulimit -n” to be at least 4096.

And if I checked the soft limit for the user processes , it was set to 1024:

ASH Data and How Sizing an AWR Warehouse Can be Mitigated

When sizing the AWR Warehouse, one of my requirements is to have certain reports for a sampling of databases that will source the AWR Warehouse. This report provides me the right information to create the correct sizing requirements vs. any assumptions done with other choices.