ORA-01114 Not Recorded Correctly in Alert Log

A user reported an ORA-01114 and an ORA-27069 in a 3rd party application running against an Oracle 11.1 database:

ERROR 28/01/2015 10:32:37  INF2 LKPDP_10:READER_1_1  RR_4035    SQL Error [
ORA-01114: IO error writing block to file 201 (block # 524367)
ORA-27069: attempt to do I/O beyond the range of the file
Additional information: 524367
Additional information: 7
Additional information: 524289
ORA-01114: IO error writing block to file 201 (block # 524367)
ORA-27069: attempt to (more...)

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Restrict the query optimizer through OPTIMIZER_FEATURES_ENABLE and Top-Frequency/Hybrid Histograms

To make upgrades easier, I regularly see people considering disabling query optimizer features by setting the OPTIMIZER_FEATURES_ENABLE initialization parameter to a non-default value. My general opinion about this “habit” is summarized in TOP with the following two sentences:

Changing the default value of the OPTIMIZER_FEATURES_ENABLE initialization parameter is only a short-term workaround. Sooner or later the application should be adapted (optimized) for the new database version.

The issue is that not all new features are (more...)

Enterprise Management Agent Host Credentials for PAM and LDAP

We use LDAP users to install oracle software. In my humble opinion, it’s not a good approach because if the server can not communicate with LDAP service, Oracle gets errors when spawning new processes. We have already started to switch our oracle users from LDAP authentication to local users, but this is not the subject of this blog post. Using LDAP for authentication, also affects Enterprise Manager agents. When I try to create a named (more...)

OT: Pictures from the NoCOUG winter conference at Oracle HQ

There were 130 attendees at the Oracle conference center on January 27 at the Oracle conference center in Redwood City. There was a fantastic breakfast spread. The registration desk was a marvel of neatness. Delphix sent its most photogenic representative. And so did Cloudera. Andy Mendelsohn’s body language says it all: “Oracle is king of the hill and we’re planning to stay here for a long time.” Andy started at Oracle as a junior (more...)

High CPU during I/O?

Yesterday, I posted a trace file that seemed odd to me Twitter. This resulted in a very lively discussion, and several very interesting theories were put forward. Even though the issue hasn’t been solved yet, I would like to post a summary of this discussion (plus my findings) so that more people would be able to give their inputs. Also, some of the theories put forward to explain the observed anomaly are very interesting on (more...)

GGSCI Commands : History and Command (!) recall

Ever get tired of typing commands?  Ever wish there was a way to recall commands from GGSCI?  Well, you are in luck!  There are two ways this can be done (listed below).

Commands:
1. History
2. ! (command)

The first option, History, is a command that allows you to view a list of the most recent commands executed in the GGSCI interface since the session started.  

Example:

GGSCI> history

Output:

GGSCI Command History

    (more...)

10046.pl by Clive Bostock

Note:

This is a reposting of an old blog post that was on dboptimizer.com but is no longer accessible

More trace file analyzer tools at  http://ba6.us/node/177

Related blog post: Oracle “Physical I/O” ? not always physical


Often when I have a 10046 trace file, especially when looking at I/O issues, I want a histogram of I/O response time.  To get I/O response time I’ve hacked out incomple awk scripts from time to time, (more...)

An Oracle Instance is Like An Upmarket Restaurant

I recently did an Introduction to Oracle presentation, describing how the oracle instance worked – technically, but from a very high level. In it I used the analogy of a restaurant, which I was quite happy with. I am now looking at converting that talk into a set of short articles and it struck me that the restaurant analogy is rather good!

Here is a slide from the talk:

Simple partial overview of an Oracle Instance

Simple partial overview of an Oracle (more...)

Enterprise Manager and Services, Part I

The term “Service” is used to represent numerous objects within Enterprise Manager 12c.  Although the most common reference to the term is related to the Oracle Management Service, (OMS), in this blog post, we are going to drill down and refer to all services identified in the drop down menu from Targets, Management Services and Repository.

The two main services we are going to cover here are set up as part of the Oracle Enterprise Manager 12.1.0. (more...)

Put Delphix on your laptop at Oracle Jan 28 !

 

#CloneAttack

Create an army of clone databases and applications in minutes

cloneattack

Tomorrow Jan 28 we will be installing Delphix on people’s laptops at the BIWA conference at Oracle conference center at Oracle head quarters in Redwood Shores.

Prerequisites

  • Laptop, either
    • Mac: VMware Fusion or VirtualBox
    • Linux: VMware Fusion or VirtualBox
    • Windows: VMware Workstation or VirtualBox
  • at least 8 GB RAM
  • at least 50 GB free disk space, but preferably 100 GB free
  • at least 2 Ghz CPU, (more...)

Succeeding with Test Data Management

 

 

Screen Shot 2015-01-26 at 6.00.46 PM
Test data management is difficult, time consuming and expensive leading to incorrect implementation of test data management and significant losses in revenue from high QA costs to bugs in production. Fortunately there is a solution that alleviates the majority of the huge resource, time and planning of conventional test data management and that new technology is called data virtualization.
Dependable QA testing requires that code be tested on data that represents the data (more...)

The Hitchhiker’s Guide to the EXPLAIN PLAN Part 32: Pretzels created by someone experimenting with hallucinogens?

In an interview for the NoCOUG Journal, Steven Feuerstein said: “Some people can perform seeming miracles with straight SQL, but the statements can end up looking like pretzels created by someone who is experimenting with hallucinogens.” As if to prove Steven correct, NoCOUG held three international SQL challenges. The winning entries were mind-boggling indeed.(read more)

Indexing Points to Remember

Indexing depends upon the queries in the application.

There is no one-size-fits-all break-even point for indexed versus table scan access. If only a few rows are being accessed, the index will be preferred.

If almost all the rows are being accessed, the full table scan will be preferred. In between these two extremes, your “mileage” will vary.

A concatenated index is more useful if it also supports queries where not all columns are specified. For (more...)

5 ways to boost your career with Social Media

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Photo by Kevin Dooley

If you are in the Bay Area tomorrow, Jan 27, come see myself, Yann Ropars and Yury Velikanov talk about how to leverage social media to boost your career. We will be talking at Oracle head quarters at the NoCOUG/BIWA conference at 2:30 pm 

Why use social media as an IT technician? Because

vibrant social networks are key to landing jobs, moving forward in your career, and securing personal happiness – (more...)

Find it. Fix it. Real-World SQL Tuning Cases – Jan. 13 Webinar Followup

If you missed my January 13th webinar entitled "Find it. Fix it. Real-World SQL Tuning Cases" you can now access the recording and download the presentation file using the following links.

Presentation PDF
Webinar recording




Abstract
There are many ways to find SQL that is performing poorly. The hard part is what to do with a bad SQL statement once you have it. In this session, several real-world examples will be reviewed to help you (more...)

Deprecation of Non-CDB Architecture in Oracle 12c

dead-end

Back in July 2013, Oracle released the latest version of its flagship database product, Oracle 12c. Among the usual fanfare was information about a number of new options – including one known as Multitenant. With the Multitenant option, databases use a new architecture which features a container database (or CDB) which in turn contains one or more pluggable databases (or PDBs). Use of Multitenant requires a licence – which at the time of writing retails at $17,500 (more...)

Non-CDB Architecture Is Officially Deprecated….

Yeah, it’s indeed true and official. So if you still haven’t started reading and learning Multitenant architecture introduced in 12.1.0.1 and enhanced in 12.1.0.2, it’s high time that you start doing it. Not because that it’s new but because the old architecture you are familiar with, it’s officially on the verge of extinction.

Oracle Midlands : Event #8

Oracle Midlands Event #8 is now confirmed and one of the speakers looks rather familiar! :)

om8

Thanks again to Redgate for sponsoring the event, allowing it to remain free!

Put the date in your diary. See you there!

Cheers

Tim…


Oracle Midlands : Event #8 was first posted on January 26, 2015 at 3:06 pm.
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