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RAC object remastering ( Dynamic remastering )
In RAC, every data block is mastered by an instance. Mastering a block simply means that master instance keeps track of the state of the block until the next reconfiguration event (due to instance...
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gc buffer busy waits
If you have the opportunity to work in a RAC environment, you probably encountered (or you will encounter soon ) this wait event: ‘GC Buffer busy’. We will explore issues leading to excessive waits...
View Articlegc buffer busy acquire vs release
Last week (March 2012), I was conducting Advanced RAC Training online. During the class, I was recreating a ‘gc buffer busy’ waits to explain the concepts and methods to troubleshoot the issue....
View ArticleDynamic Resource Mastering in 12c
I blogged about Dynamic Resource Mastering (DRM) in RAC here . DRM freezes the global resources during the reconfiguration event and no new resources can be allocated during the reconfiguration. This...
View ArticleGolden rules of RAC performance diagnostics
After collaborating with many performance engineers in a RAC database, I have come to realize that there are common pattern among the (mis)diagnosis. This blog about discussing those issues. I talked...
View ArticleRMOUG Training Days 2015
I will be talking in Rocky Mountain Oracle User Group Training Days 2015( http://www.rmoug.org), with live demos (hopefully there will be no failures in the demo). My topics are:Feb 17: Deep dive:...
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