My slideshare site has had 1000 views
I have put up some presentations and articles on slideshare. My site there has had 1,000 views....
View ArticleBOGOF from Packt
Packt Publishing is celebrating the publishing of their 2000th book with a Buy One Get One Free offer....
View ArticlePlan HASH_VALUE remains the same for the same Execution Plan, even if ROWS...
Here is a simple demo that shows that the Plan Hash_Value does not consider the ROWS and COST but only the Execution Plan. Thus, even with more rows added into a table, if the Execution Plan remains...
View ArticleStoring Trailing NULLs in a table
Oracle has an optimization in that if, for a row, all trailing columns are NULL, it does not have to store the NULL in each column, but saves space by reducing the physical size of the row in the block...
View ArticleUpgrading Certification to 12c
Here's an Oracle Webinar on upgrading certification to 12c...
View ArticlePageView Count
PageView count of this blog, Top 10 Countries Country PageViewsUnited States 250,986India 116,730United Kingdom 37,784Germany 29,809France...
View Article(Slightly Off Topic) Spurious Correlations
During the course of the job, we find, discover and analyze "data" and come up with "information". Sometimes we find correlations and "discover" causes. We say "Event 'A' caused Result 'X'"....
View ArticlePartitions and Segments and Data Objects
Have you ever wondered about how Partitions are mapped to Segments ? How does Oracle identify the "data object" (as different from the logical object) that maps to the Segment for an Object ? [Why...
View ArticleOracle Diagnostics Presentations
I've uploaded my Oracle Diagnostics Presentations from the years 2010-2011 into slideshare.I hope that they are useful....
View ArticleGuenadi Jilevski's posts on building RAC Clusters on VM Virtual Box
Guenadi Jilevski has a few posts on building Oracle RAC Clusters on VM Virtual Box1. 11gR2 RAC co-existing with 10gR22. 11gR2 RAC using GNS3. 12c RACNote : Unfortunately, I haven't had the time and...
View ArticleGetting your Transaction ID
You can get the Transaction ID for a session by joining V$SESSION.TADDR to V$TRANSACTION.ADDR.A Transaction ID consists of the Undo Segment #, the Slot # and the SEQ #.For example :SQL> select...
View ArticleGather Statistics Enhancements in 12c
Here are 5 posts that I did on Gather Statistics Enhancements in 12c :1. During a CTAS2. In a Direct Path INSERT3. Reports on Statistics4. Does not COMMIT a GTT5. Report on COL_USAGE...
View ArticlePassed the 11g RAC and Grid Expert Exam
I passed the 11g RAC and Grid Expert Exam yesterday..For those who are interested :You must absolutely read the documentation on ASM, Grid Infrastructure and RAC. I also recommend 3 books 1) Pro Oracle...
View ArticleInstalling OEL 6 and Database 12c
Here is a collection of posts on installing (a) Virtual Box (b) Oracle Enterprise Linux 6 (c) 12c Grid Infrastructure (Standalone, non-Clustered) and ASM (d) 12c Database with CDB and PDB....
View ArticleRAC Commands : 1 -- Viewing Configuration
Viewing the configuration of a RAC database[root@node1 ~]# su - oracle-sh-3.2$ srvctl config database -d RACDBDatabase unique name: RACDBDatabase name: RACDBOracle home:...
View ArticleRAC Commands : 2 -- Updating Configuration for Services
NOTE : This is in a Policy Managed configurationAdding a database service[root@node1 ~]# su - oracle-sh-3.2$ srvctl add service -d RACDB -s NEW_SVC -g RACSP -c SINGLETON-sh-3.2$ srvctl config service...
View ArticleGI Commands : 1 -- Monitoring Status of Resources
In 11gR2Listing the Status of Resources[root@node1 ~]# su - grid-sh-3.2$ crsctl status resource -t--------------------------------------------------------------------------------NAME TARGET STATE...
View ArticleGI Commands : 2 -- Managing the Local and Cluster Registry
In 11gR2There are essentially two registries, the Local Registry and the Cluster Registry.Let's check the Local Registry :[root@node1 ~]# cat...
View ArticleASM Commands : 1 -- Adding and Using a new DiskGroup for RAC
In 11gR2 Grid Infrastructure and RACOn node1, I discover and add a disk to ASM. NFS "devices" asmdisk.1 to asmdisk.6 are present as ASM Disks. asmdisk.7 has been added on NFS mount point /data1....
View ArticleASM Commands : 2 -- Migrating a DiskGroup to New Disk(s)
In 11gR2 Grid Infrastructure and RACAfter the previous demonstration of adding a new DiskGroup, I now demonstrate migrating the DiskGroup to a new pair of disks.First, I create a table in the...
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