Log buffer space is a simple, yet frequently misunderstood wait event. The main reason for that is probably its name. It sounds as if it points immediately to the answer: if space in the log buffer is the issue, then increasing it surely should resolve it. Well, unfortunately even though log buffer space is simple, it’s not that simple.
Last week I talked about many of the non technical facets of OOW. This week I want to focus on some of the technical aspects of Open World. Before I talk about the event itself and those announcements let me tell you about two ‘new’ tech things that are causing disruption in their markets. The first […]
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Oracle OpenWorld has always been my most exciting conference to attend. I always see high energy levels everywhere, and it kind of revs me up to tackle new upcoming technologies. This year I concentrated on attending mostly Oracle E-Business Suite release 12.2 and Oracle 12c Database-related sessions.
When using the Data Guard Broker, you don’t need to set any LOG_ARCHIVE_* parameter for the databases that are part of your Data Guard configuration. The broker is doing that for you. Forget about what you may have heard about VALID_FOR – you don’t need that with the broker. Actually, setting any of the LOG_ARCHIVE_* parameters with an enabled broker configuration might even confuse the broker and lead to warning or error messages. Let’s look at a typical example about the redo log transport mode.
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It's amazing to you find out how easy is to take for granted certain features of Apex for the simple fact that you have been using them for a long time without paying too much attention to certain specific details.
This morning I ran a report that I rarely use in an application and to
During one of the classes I taught about Exadata optimisations I had an interesting question:
If I am using VPD, will Exadata still offload the query?
Background is that we discussed function offloading, and the meta-view v$sqlfn_metadata. It turned out that SYS_CONTEXT() is not offloadable in 184.108.40.206.
At Oracle Open World 2014, or rather the Oaktable World, Chris Antognini has presented 'Indexes: Structure, Splits and Free Space Management Internals'. It's not something new, but it's still something that is not always well understood: how index space is managed, block splits, fragmentation, coalesce and rebuilds. Kyle Hailey has made a video of it available here.
For me, it is the occasion to share the script I use to see if an index is fragmented or not.
The content you publish on your site is the result of a lot of behind-the-scenes activity — and we’re not talking only about drafting posts and pages. Emails, meetings and events, documents and spreadsheets: as business owners and publishers you have a lot to juggle.
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When I started this blog, almost 6 years ago I had a clear purpose: give back. I had extracted so much useful information from the internet and in early 2009 it was time to give back. Publish my tricks, secrets, tips, etc. I then moved into Oracle and now I can’t disclose everything I know. […]