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April 2012

Philosophy 16

I couldn’t help laughing when I saw this.

RMAN duplicate and read-only tablespaces

This one is to be filed under the “little things I didn’t really know until now” section: RMAN duplicate. Be honest to yourself: would you have known the answer to this question: what happens to tablespaces which are read-only on the source during an RMAN duplication (not for standby)?

Some background

I have started my career as a DBA on Oracle 8.1.7.0, and at the time not everyone fully embraced RMAN. OK, RMAN made it really hard at the time to fall in love with it. So when we “cloned” our production database to development, the following steps were followed:

Another one (conference) bites the dust…

Unfortunately I’ve just had to pull out of the Austrian Oracle User Group conference in Vienna in June. It’s a one day conference and only one of my papers was selected. The ACED travel support requires that at least two* papers are selected before you can apply for approval, so that knocks me out of the running. Sorry for any inconvenience to the organizers. On the positive side, another slot has opened up in the schedule for someone else to present. :)

As a note to other ACEDs, make sure conference organizers are fully aware of the conditional nature of your application. I always try to remind people that I can only come if I get travel approval, but in this case that message got lost somewhere down the chain.

Cheers

Tim…

Failed Logon Attempts

April 4, 2012 A fair number of articles on this blog are Oracle performance related in one respect or another.  I started thinking about how to measure how much more efficient something is when compared to something that is never performed.  Consider a situation where you had a database user account that is a member of the [...]

Statspack quiz

I’ve a level 5 Statspack report from a real production 11.2.0.2 database with the following Top 5 Timed events section:

VirtualBox 4.1.12 Released…

Just a couple of weeks after the last release, to make sure we didn’t think it was an April fools joke, Oracle waited until April 2nd to release VirtualBox 4.1.12 into the wild. :)

You can see the changelog here.

Happy upgrading.

Cheers

Tim…




Advert: Nederlands preview event ‘Collaborate 12′ (Dutch)

‘COLLABORATE 12: Technology and Applications Forum for the Oracle Community’ is de grootste Oracle gebruikersgroep conferentie ter wereld en wordt jaarlijks georganiseerd in de Verenigde Staten. Het is hét evenement om bij te zijn wanneer je geïnteresseerd bent niet alleen in Oracle Applications (E-Business Suite, JD Edwards, Siebel, etc.) maar ook in Oracle Technologie in

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Advanced Oracle Troubleshooting v2.0 seminars in 2012

I am going to run my updated Advanced Oracle Troubleshooting online training again, in May and June! :)

As there’s been so much demand from all over the world (thanks to everyone who’ve sent me mails about it ;-), I’ll actually do it twice, once for the US/European timezones (8am-12pm in California and d 5-9pm in central Europe) and once for the APAC timezones (2pm-6pm in Sydney/Melbourne) on every day. Both events are split into 2 parts, for the US event there’s around a month between the parts, for the APAC event there’s a week betweern Part1 and 2 (so you can get some rest and/or some work done in between too :-)

There’s convincing and then there’s curiosity

This past week, Cary Millsap posted one of the ways he’s teaching his children to understand concepts and to prove to him that they understand the methods for solving problems by presenting them with a classic puzzle.

The puzzle talks about the length of a piece of string wrapped around a circle (in this case, the whole Earth), and how much longer it would need to be if it was raised 4 more inches off the ground? As his kids worked through the problem, Cary provided us with the neat answer in which you didn’t need to know the circumference of the Earth, or any other circle for that matter — the increase in length is a simple function applied to the additional height above the ground.