Waiting for row lock. But which row is locked?
When you are waiting on a locked row, the locked resource is the transaction that has locked the row. We have no information about which row is locked. Here is how to get it from V$SESSION. In a first...
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You are in Standard Edition One? Don’t worry.
You want the amazing features of Oracle SQL and PL/SQL with minimal cost. Your database is too large for Oracle XE edition, but not big enough to require the cost of Enterprise Edition. You accept to...
View ArticleDo you use SQL Plan Baselines?
I can hear a lot of complaints about the instability coming from the adaptive features introduced into the optimizer logic at each releases. Giving more intelligence to the optimizer is very good to...
View ArticleSEVERE:OUI-10020:The target area /u01/app/oracle/oraInventory/ is being used...
What to do if you get the above error when you try to install Oracle SE2 (did not test if the same issue is there with EE, but probably it is) in silent mode?: ./runInstaller...
View ArticleQuery V$UNDOSTAT for relevant time window
When you have a query failing in ‘ORA-01555: snapshot too old: rollback segment number … with name … too small’ you have two things to do: Convince the developer that the rollback segment is not too...
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11.2.0.4 support? Don’t worry until 2017
Customers reluctant to go to 12c before 12.2, in addition to Standard Edition contract changes when going to 12c, has lead to lot of upgrades to 11.2.0.4 but what about support? Don’t worry. It’s...
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You are in Standard Edition, when to worry?
A previous blog post explaining what happens for those in ‘Standard Edition One’ had a “don’t worry” in the title because you can upgrade to SE2 with minimal additional cost – except when you have to...
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Oracle Cloud Service – my first outage
We experienced the first planned outage this week-end, so let’s see how it is notified and what happens. EMEA Commercial 2 – Amsterdam Outage notification before: subject: Announcement: Upcoming...
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OOW15 – Day 1- No fog on Golden Gate brige but Cloud everywhere at Moscone...
Here are the two sides of the Oracle Open World: marketing and community. Of course Oracle organizes that big event for marketing: show the future products and explain how they are better than all...
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OOW15 – Day 3 – thoughts from DemoGrounds about SIZE AUTO
If you are at Oracle Open world, don’t miss the DemoGrounds where you can talk to product managers and developers. It’s a good way to know how and why something is implemented. They also listen to you...
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RMAN channels in RAC
When you want to minimize the backup or restore duration, you can parallelize RMAN operations by allocating multiple channels. If you are in cluster, you can open channels from several nodes. Let’s see...
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AWR when ASH CPU >> DB CPU
I’ll present How to read an AWR report next month at UKOUG TECH15 and the first recommendation after checking Average Active Sessions is to verify that we are not in a CPU starvation situation. Here is...
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Interested in a deep dive of logical replication?
It’s next week at #DOAG2015 Interested in a deep dive of logical replication? Let’s try it. The best way to learn is to try it and this is the idea of #RepAttack where you can quickly install a...
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Oracle Data Integrator – The EL-T tool from Oracle
Oracle Data Integrator is the ETL tool that Oracle has developed to enter into the world of Business Intelligence. Taking advantage of its incredible experience in database managing, Oracle has created...
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Cloud Control 12c on your laptop
Today every DBA should have a lab on his laptop. This is where I reproduce most of cases before opening a SR, or to investigate something, to demo, to learn new features, or to prepare an OCM exam....
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The scripts of my DOAG 2015 session: Automated GI/RAC staging with Cobbler...
I promised to upload the scripts of my session to our blog. So, here they are: create_12102_gi_rac_project.sh: This one creates the 12.1.0.2 GI/RAC project on the cobbler server...
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Oracle Compliance Standard
In Enterprise Manager 12c, using the compliance standard results might be a good solution for DBA’s to detect security incoherences (for example a lambda user who has the sysdba role …) for their...
View ArticleUpgrading the Grid Infrastructure from 12.1.0.1 to 12.1.0.2 on the command line
A lot of people use the graphical way to upgrade Oracle software from one version to another. While there is nothing to say against that the same can be done without any graphical tools. This post...
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OCM 12c preparation: Create CDB in command line
This post starts a series about things I wrote while preparing the OCM 12c upgrade exam. Everything in those posts are written before taking the exam – so don’t expect any clue about the exam here....
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OCM 12c preparation: Manage PDB
Let’s see the different ways to create a PDB, with different tools. Same disclaimer here as in the first post of the series: don’t expect to get those posts close to what you will have at the exam, but...
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