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Exadata memory configuration
Read this post if your Exadata compute nodes have 512/768GB of RAM or you plan to upgrade to the same.There has been a lot of information about hugepages and I wouldn’t go into too much details. For...
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Exadata migration
Had a wonderful Sangam16 conference in India, and received much applaud for the two presentations delivered, Oracle 12c multitenancy and Exadata migration best practices.After a very short trip to...
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Unable to perform initial elastic configuration on Exadata X6
I had the pleasure to deploy another Exadata in the first week of 2017 and got my first issue this year.As we know starting with Exadata X5, Oracle introduced the concept of Elastic Configuration....
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onecommand fails to change storage cell name
It’s been a busy month – five Exadata deployments in the past three weeks and new personal best – 2x Exadata X6-2 Eighth Racks with CoD and storage upgrade deployed in only 6hrs!An issue I encountered...
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Upgrading to Exadata 12.1.2.2.0 or later – mind the 32bit packages
This might not be relevant anymore, shame on me for keeping it draft for few months. However, there are still people running an older versions of Exadata storage software and it might still help...
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Oracle Database 12.2 released for Exadata on-premises
We live in exciting times, Oracle Database 12.2 for Exadata was released earlier today.The 12.2 database was already available on the Exadata Express Cloud Service and Database as a service for a few...
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Whats new in Exadata X7
Oracle announced its new Exadata Database Machine X7 during OOW 2017. Lets walk through quickly about the key features of X7.Key featuresUp to 912 CPU core and 28.5TB memory per rack2 to 19 DB servers...
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Exadata X5-2L deployment & Challenges
A brand new Exadata X5-2L eighth rack (I knew the latest is X7 now, but it was for a POC, so no worries) has been deployed recently at a customer for Oracle EBS Exadata migration POC purpose. Its...
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Oracle EBS Suite blank Login page - Post Exadata migration
As part of EBS database migration on Exadata, we recently deployed a brand new Exadata X5-2L (eighth rack), and migrated an Oracle EBS Database from the typical storage/server technologies. Below are...
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Clearing the Exadata smart flash cache using dcli
I’ve been doing some performance benchmarks on our exadata box specifically focusing on the performance of the smart flash cache. I found that even if I switched the CELL_FLASH_CACHE storage setting to...
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Configuring Exadata flash as grid disk
The default – or at least a very common - configuration for Exadata is to configure all the flash as Exadata Smart Flash Cache (ESFC). This is a simple and generally performant configuration, but won’t...
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Using flash disk for Redo on Exadata
In this Q uest white paper and on my SSD blog here, I report on how using a FusionIO flash SSD compares with SAS disk for various configurations – datafile, flash cache, temp tablespace and redo log....
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Using SSD for redo on Exadata - pt 2
In my previous post on this topic, I presented data showing that redo logs placed on an ASM diskgroup created from exadata griddisks created from flash performed far worse than redo logs placed on ASM...
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Exadata smart flash logging
Exadata storage software 11.2.2.4 introduced the Smart flash logging feature. The intent of this is to reduce overall redo log sync times - especially outliers - by allowing the exadata flash storage...
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Exadata Smart Flash Logging–Outliers
In my last post , I looked at the effect of the Exadata smart flash logging. Overall, there seemed to be a slight negative effect on median redo log sync times. This chart (slightly different from the...
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“Ex”-Men
In 2008 Oracle introduced Exadata, and data warehousing, business intelligence and OLTP applications have benefited from this integrated technology stack. Exadata is not like anything most DBAs have...
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I Can’t Find My Keys
Exadata offers many features to improve performance — Smart Scans, offloading, Infiniband internal network — but the one feature not often mentioned is the storage index. Designed to prevent Exadata...
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You Can Never Be Too Smart
Smart Scans are part of what Kerry Osborne calls the ‘secret sauce’ of Exadata, and he’s right. Smart Scans can definitely improve throughput by using the various optimizations to reduce the amount of...
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OSWatcher Startup/Restart On Exadata
When the question of what starts OSWatcher (OSW) on Exadata was raised at a client site and I thought I’d take a quick look. It took me a little longer than I expected to work out the detail and...
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Patching an Exadata Compute Node
An Oracle Exadata Full Rack consists of 8 DB compute nodes. Oracle has shifted the strategy to patching the exadata in 11.2.3.2.0 onwards to using Yum as the method of patching. the Quarterly Full...
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