ALL POSTS

RDBMS Online Patching

If you support Oracle RDBMS 11.2.0.2 and want to zero downtime applying patches to databases then it is time to have a look at new possibility of Online Patching delivered with 11.2.0.2 version and described here.

Alter Waiting on Select Statement to Complete

A few days ago, we faced an interesting problem on one of our customer’s slave mysqld servers. An Alter for adding a new column was run on master server took 542 seconds where as it took few hours on the slave server to complete due to a SELECT blocking the Alter was not allowed to complete. What happened in this situation was: ALTER started first, then concurrent SELECT started on the same table, when ALTER finished copy to a temp table it tried to RENAME table, but failed to get global lock on data dictionary. All the threads that started after this point had to wait on ALTER to finish.

Log Buffer #235, A Carnival of the Vanities for DBAs

Oracle has launched Java 7, Steve Jobs has resigned, IBM has made new alignments with HP and so on. The industry is buzzing with the breaking news while one thing is rest assured that the brightest and most innovative days are ahead of the IT industry, and so blogging is anticipating some thrilling times ahead and so are the Log Buffer Editions. To get a peek of future, lets savor Log Buffer #235.

Viewing RMAN Jobs Status and Output

Backup jobs can be scheduled in many different ways (crontab, Grid Control, Scheduled Tasks, etc) and finding the log file may be tricky if you don’t know the environment well. Furthermore, log files may also have already been overwritten by the next backup or simply just deleted. An alternative way of accessing that information, thus, may come handy. Fortunately, RMAN keeps the backup metadata around for some time and it can be accessed through the database’s V$ views. Obviously, if you need this information because your database just crashed and needs to be restored, the method described here is useless.

Log Buffer #234, A Carnival of the Vanities for DBAs

Well like all good things, summer is also ending and its closing days are rapidly approaching. For most of the database techies, there is nothing to get remorseful, because they are thrilled to be back in full flow managing and loving their databases. They are gearing up, refreshing up, re-evaluating and reassessing themselves and also blogging about it. This Log Buffer enjoys the last days of summer in this Log Buffer #234.

Log Buffer #233, A Carnival of the Vanities for DBAs

The season of conferences, webinars and seminars is coming. As the summer vacations are coming to a sumptuous and fulfilling end, the techies are getting ready towards sharpening and sharing their technical know-how with the public through the events. From MySQL to Oracle to SQL Server, the things are all set to appease your technical buds through the events. This Log Buffer contains some news about those events along with much more in this Log Buffer #233.

Exadata “technology that most changed his life”, says Oracle ACE & Pythian DBA Fahd Mirza

Pythian’s Oracle ACE, Fahd Mirza appears in this month’s Community: Peer-to-Peer review “In With the New”, as published in the September/October 2011 issue of Oracle Magazine. Fahd states that “Oracle Exadata Database Machine” has most changed his life – changing the game, and setting very high standards of performance, support, scalability, reliability and unification. Shout out to Fahd from your peers at Pythian!

A Missed Opportunity?

I am reading the announcement about the Percona MySQL event in place of the O’Reilly.
What I see and what I feel is that the whole MySQL community, including Oracle, Percona, SkySQL,MariaDB and any other company doing business with MySQL have lost a good opportunity (so far).

Pythian Speaking at Oracle OpenWorld 2011

Pythian is pleased to announce our speaking schedule at this year’s Oracle OpenWorld 2011. We’re excited to be joined by our customers Western Union, and Worldwide Technologies (WWT) as we present real-world experiences and project success. If you’re attending, don’t miss the chance to hear our team of experts. Bring your toughest questions to be answered.

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