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Displaying posts with tag: Oracle (reset)
Log Buffer #514: A Carnival of the Vanities for DBAs

This Log Buffer Edition encompasses few of the nifty blog posts from Oracle, SQL Server and MySQL.

Oracle:

Introduction to Oracle Big Data Cloud Service

Interpreting wpad.dat using jrunscript from JDK 8 to work out the right proxy.

Nice Trick to Get ADF LOV Description Text

Presentation: Dynamic Actions, Javascript, & CSS for APEX Beginners

E4 Session …

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Log Buffer #513: A Carnival of the Vanities for DBAs

This Log Buffer Edition includes blog posts from Oracle, SQL Server and MySQL.

Oracle:

In 12.2 you can: Convert a simple table to partitioned with multi-column automatic list partitions, partially indexed, with read only segments, filtering out unwanted data, online in one operation.

12c How to UN Expire Password for CDB Users

rman auxiliary (for duplicate)

How long will Oracle APEX remain an included feature of the Oracle Database?

How to easily delete files …

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Log Buffer #512: A Carnival of the Vanities for DBAs

This Log Buffer Edition covers Oracle, SQL Server and MySQL.

Oracle:

Upgrade Existing TDE to Use New Unified Key Management in 12c Upgraded Database (non-cdb)

Instrumentation … not just for debugging

12.2 Index Deferred Invalidation (Atomica)

Collation in 12cR2 – when AA equals Å (or not?)

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Kafka Replication from MySQL and Oracle

Hello again everybody.

Well, I promised it a couple of weeks ago, and I’m sorry it has been so long (I’ve been working on other fun stuff in addition to this). But I’m pleased to say that we now have a fully working applier that takes data from an incoming THL stream, whether that is Oracle or MySQL, and converts that into a JSON document and message for distribution over a Kafka topic.

Currently, the configuration is organised with the following parameters:

  • The topic name is set according to the incoming schema and table. You can optionally add a prefix. So, for example, if you have a table ‘invoices’ in the schema ‘sales’, your Kafka topic will be sales_invoices, or if you’ve added a prefix, ‘myprefix_schema_table’.
  • Data is marshalled into a JSON document as part of the message, and the structure is to have a bunch of metadata and then an embedded record. You’ll see an …
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Log Buffer #511: A Carnival of the Vanities for DBAs

This Log Buffer Edition covers Oracle, SQL Server, MySQL.

Oracle:

A Sneak Peek at Oracle’s Chatbot Cloud Service and 5 Key Factors Necessary for Bot ROI

Oracle JET Hybrid – NavDrawer Template Menu/Header Structure

Oracle Enterprise Linux 6.6 AMI Available on AWS

Datascape Podcast Episode 9 – What’s Up with Oracle These Days?

Sequential Asynchronous calls in …

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Will SQL just die already?

With tons of new No-SQL database offerings everyday, developers & architects have a lot of options. Cassandra, Mongodb, Couchdb, Dynamodb & Firebase to name a few. Join 33,000 others and follow Sean Hull on twitter @hullsean. What’s more in the data warehouse space, you have Hadoop, which can churn through terabytes of data and get … Continue reading Will SQL just die already? →

Percona Live 2017

So glad to have had a successful Percona Live last week. Continuent were Diamond Sponsors and now that we are back into a company and not part of VMware we have a little more freedom to get back into the MySQL community.

I had two primary sessions, both on the replicator/ But one was looking specifically at the replicator and how we get data into Big Data targets, the other on general problems of replicating between heterogeneous sources. After the first of those, David from Percona interviewed me to understand a bit more about what I was talking about

I was also on the keynote panel where we discussed a variety of different …

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Percona Live 2017: Day Two Keynotes

Welcome to the second day of the Percona Live Open Source Database Conference 2017, and the second set of Percona Live keynotes! It’s a bit rainy outside today, but that isn’t bothering the Percona Live attendees (we’re all indoors learning about new open source technologies)!

Day two of the conference kicked off with another four keynote talks, all of which discussed issues and technologies that are addressed by open source solutions:

The Open Source Database Business Model is Under Siege

Paul Dix (InfluxData)

Paul Dix’s keynote may have ruffled a few feathers, as he looked at possible futures for the open …

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M17 Conference Observations on the Future of MariaDB

In this blog post, I’ll discuss some of my thoughts about the future of MariaDB after attending the M17 Conference.

Let me start with full disclosure: I’m the CEO of Percona, and we compete with the MariaDB Corporation in providing Support for MariaDB and other services. I probably have some biases!

Last week I attended the MariaDB Developers UnConference and the M17 Conference, which provided great insights into MariaDB’s positioning as a project and as a business. Below are some of my thoughts as I attended various sessions at the …

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InnoDB Locks Analysis: Why is Blocking Query NULL and How To Find More Information About the Blocking Transaction?

Consider the scenario that you execute a query. You expect it to be fast - typically subsecond - but now it take not return until after 50 seconds (innodb_lock_wait_timeout seconds) and then it returns with an error:

mysql> UPDATE world.City SET Population = Population + 999 WHERE ID = 130;
ERROR 1205 (HY000): Lock wait timeout exceeded; try restarting transaction

You continue to investigate the issue using the sys.innodb_lock_waits view or the underlying Information Schema tables (INNODB_TRX, INNODB_LOCKS and INNODB_LOCK_WAITS).

Note:

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