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AWR Generator
As part of my role at Violin I spend a lot of time profiling customer’s databases to see how their performance varies over time. The easiest way to do this (since I often don’t have remote access) is...
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Oracle AWR Reports: Understanding I/O Statistics
One consequence of my job is that I spend a lot of time looking at Oracle Automatic Workload Repository reports, specifically at information about I/O. I really do mean a lot of time (honestly, I’m...
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New AWR Report Format: Oracle 11.2.0.4 and 12c
This is a post about Oracle Automatic Workload Repository (AWR) Reports. If you are an Oracle professional you doubtless know what these are – and if you have to perform any sort of performance tuning...
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Oracle AWR Reports: When Averages Lie
I was recently contacted by a customer who runs a busy ERP system on their Oracle database. Their users have been screaming for some time about unpredictable performance, where application screens...
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Oracle AWR Reports: When IOStats Lie
If you’ve been unfortunate enough to follow my dithering on Twitter recently you’ll know that I’ve been lurching between thinking that there is and isn’t a problem with Oracle’s tracking of I/O...
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