DBA Kevlar

Tips, tricks, (and maybe a few rants) so more DBAs become bulletproof!

Weblogic Start Failure: Empty Initial Replica

This post is to address a failed Weblogic start in EM12c.  The fix is performed on a Windows host, but the fix can easily be for any EM12c environment that experiences this issue.  In the below instructions, just replace the %OMS_BASE% for Windows Env Var to $OMS_BASE for Linux/Unix. Issue:  OMS Fails to Start and […]

Monitoring a Microsoft OS Failover Cluster

I know, I know-  none of you are using Microsoft Windows.  This is why I get so many questions on this topic and why there is so much interest in a white paper that no one thought I needed to write.  Well, while that pesky ol’ white paper is in review, I’m going to go […]

Using ASH Analytics to View Blocked Sessions

When concurrency is the crippling factor in a database performance issue, often I’m told that viewing blocked sessions in Enterprise Manager is difficult.  The query behind, along with flash image generation in any Enterprise Manager can take considerable time to render and no matter how valuable the view is, the wait is something DBAs just […]

AWR Warehouse, Status

So the AWR Warehouse patches are out, but documentation has not officially caught up to it yet, so as we appreciate your patience.  I thought I would post about what I went over in my webinar last week when I had the wonderful opportunity to speak to the ODTUG members on this feature that everyone […]

AWR Warehouse Webinar from ODTUG

The webinar is over, but you haven’t missed out on everything I presented on the console feature, under the hood and behind the scenes! You can access the slides from today’s presentation, as I’ve uploaded them to slideshare and the scripts are easy to locate on the scripts page here on DBAKevlar. Thanks to everyone […]

Tuning EM12c, the OMS, Part II

We went over a few of the Java “tuning” options last time, so let’s go onto the OMS tier for this post. Location, Location, Location High latency issues between the OMS(Service) and the OMR, (Repository) when separated by geographical location is common.  It’s important when designing the Enterprise Manager environment that you keep your OMS […]

Tuning EM12c- Onto the Next Tier, JAVA

I’ve already talked about the recommendations we make for properly sizing an Enterprise Manager 12c and many already know about tuning a database, but let’s look at the tuning that may be a bit foreign to DBAs.  We’ll start with Java. We all know that it’s part of the EM12c architecture, but we often don’t […]

Note Pro 12.2 Review- Officially Drove Me to Apple!

I am a long time supporter of Samsung products- I’ve always had Samsung phones, (currently a Note 3 owner…) Samsung TVs, monitors and even have a Samsung microwave and refrigerator. I love Samsung products and this has included my tablets, recently deciding to upgrade my Samsung Note 10.1, (original) for a Samsung Note Pro 12.2. […]

EM12c Release 4, Private Roles

Until OEM11g, it was very common that all folks were either Super Administrators or Administrators and only a few shops took the time to create roles outside of these two essential roles.  Super Administrator, (SA) was pretty straight forward-  the SA had essentially the same access as the repository owner and should only be allocated […]

EM12c and Hardware

I often hear, “My EM12c environment is slow!” and I just as often am granted access to the environment and find out that EVERYTHING is running on an old single core server with 2Gb of RAM someone found lying around.  Enterprise Manager is often an after thought to many IT organizations.  After all the work […]

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