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performance

Exadata Hybrid Columnar Compression (HCC) for (storage) dummies

Bart Sjerps 2012-08-03 Oracle 12 Comments

Although EMC and Oracle have been long-time partners, the Exadata Database Machine is the exception to the rule and competes with EMC products directly. So I find myself more and more in situations where EMC offerings are compared directly with…

 2,831 total views

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Managing REDO log performance

Bart Sjerps 2012-05-20 Oracle, Performance 14 Comments

I have written before about managing database performance issues, and the topic is hot and alive as ever. Even with today’s fast processors, huge memory sizes and enormous bandwidth to storage and networks. warning: Rated TG (Technical Guidance required) for…

 2,847 total views

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Performance – The database stack

Bart Sjerps 2012-02-15 Oracle, Performance 4 Comments

As mentioned before, I frequently find myself in discussions around Oracle performance and how an Oracle database behaves on EMC storage. It turns out that often there is a lot of confusion on how the different layers interact with each…

 1,028 total views

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Application processing at lightning performance – The hourglass view of access times

Bart Sjerps 2011-12-08 Performance 2 Comments

Even in these modern times, when lots of things are changing in the ICT world, some lessons from the past still hold true. Previously, I discussed the I/O stack in a typical database environment. As virtualization has complicated things a…

 856 total views

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Performance – The I/O stack

Bart Sjerps 2011-11-07 Oracle, Performance 2 Comments

In my last post, I gave a highly simplified representation of “The I/O stack” of a database. In reality, it’s much more complex. I found an old picture where the whole I/O stack of a database was described and I…

 1,214 total views

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