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External TableLuca's blog on databases, data platforms, performance.
http://externaltable.blogspot.com/
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External Table | externaltable.blogspot.com Reviews
https://externaltable.blogspot.com
Luca's blog on databases, data platforms, performance.
externaltable.blogspot.com
External Table: Getting Started with PyLatencyMap: Latency Heat Maps for Oracle, DTrace and More Sources
https://externaltable.blogspot.com/2013/09/getting-started-with-pylatencymap.html
Luca's blog on databases, data platforms, performance. Tuesday, September 10, 2013. Getting Started with PyLatencyMap: Latency Heat Maps for Oracle, DTrace and More Sources. This is a getting-started article for PyLatencyMap. A performance tool for real-time investigation and troubleshooting of latency data. Contains examples relevant for the Oracle RDBMS and for DTrace. Download the latest version of PyLatencyMap. Also available on GitHub. Getting Started with PyLatencyMap for. The wrapper script is Exa...
External Table: Latest Updates to PerfSheet4, a Tool for Oracle AWR Data Mining and Visualization
https://externaltable.blogspot.com/2015/02/latest-updates-to-perfsheet4-tool-for.html
Luca's blog on databases, data platforms, performance. Wednesday, February 18, 2015. Latest Updates to PerfSheet4, a Tool for Oracle AWR Data Mining and Visualization. This post is about the latest updates to PerfSheet4. V37 (February 2015). PerfSheet4 is a tool aimed at DBAs and Oracle performance analysts. It provides a simplified interface to extract and visualize AWR. Time series data using Excel pivot charts. PerfSheet4 comes with a set of pre-defined graphs for each of the pre-defined queries. ...
External Table: Clusterware 12c and Restricted Service Registration for RAC
https://externaltable.blogspot.com/2014/01/clusterware-12c-and-restricted-service.html
Luca's blog on databases, data platforms, performance. Friday, January 31, 2014. Clusterware 12c and Restricted Service Registration for RAC. This post is about exploring the mechanisms used by Oracle Clusterware 12.1.0.1 to restrict remote service registration, i.e. the 12c new feature "Restricting Service Registration for Oracle RAC Deployments". Why is this useful? If you have heard already about the 12c new feature of valid node checking for registration (VNCR) you are still in for a surprise. The ma...
External Table: Oracle Events' Latency Visualization and Heat Maps in SQL*plus
https://externaltable.blogspot.com/2013/05/latency-heat-map-in-sqlplus-with.html
Luca's blog on databases, data platforms, performance. Wednesday, May 8, 2013. Oracle Events' Latency Visualization and Heat Maps in SQL*plus. This post is about a technique for Oracle performance tuning, the use of heat maps. To investigate wait event latency (and in particular I/O-related latency). This post also discusses a SQL*plus-based script/tool I have developed to help with this type of monitoring and performance drill-down ( OraLatencyMap. An excellent article by Brendan Gregg. As Brendan shows...
External Table: PyLatencyMap, a Performance Tool for Latency Data Visualization
https://externaltable.blogspot.com/2013/08/pylatencymap-performance-tool-to-drill.html
Luca's blog on databases, data platforms, performance. Tuesday, August 27, 2013. PyLatencyMap, a Performance Tool for Latency Data Visualization. This post is about PyLatencyMap, a performance-oriented tool I have written for command-line drill down of latency data, integrating various data sources (Oracle, DTrace, trace files) into a basic visualization engine. Studying the latency of single block read calls can provide very useful information: how many reads are from cache? More data sources are availa...
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Partitioned Table Global Stats, they are not just decorative. | Rodrigo Righetti DBA
https://righettidba.com/2016/05/03/partitioned-table-global-stats-they-are-not-just-decorative
So they say :). Partitioned Table Global Stats, they are not just decorative. Partitioned Table Global Stats, they are not just decorative. May 3, 2016. May 3, 2016. One of my favorite features, especially when dealing with big databases is partitioning, they have been around since Oracle 8.0, and a lot has evolved and improved over the years. Although they are widely used there is still some basic principles that seems to fall through the cracks of our busy DBA life. So why Global Stats are important?
martincarstenbach.wordpress.com
Adding storage dynamically to ASM on Linux « Martins Blog
https://martincarstenbach.wordpress.com/2011/01/14/adding-storage-dynamically-to-asm-on-linux
Trying to explain complex things in simple terms. Oracle's Optimiser blog. I am speaking…. Enter your email address to subscribe to this blog and receive notifications of new posts by email. Join 3,310 other followers. Content is provided "as-is" without guarantee or warranty that it works-if you find an article useful, test first! Laquo; Nice surprise-automatic statistics email. Viewing Runtime Load Balancing Events. Adding storage dynamically to ASM on Linux. Posted by Martin Bach on January 14, 2011.
This Is Not Glossy Marketing But You Still Won’t Believe Your Eyes. EMC XtremIO 4.0 Snapshot Refresh For Agile Test / Dev Storage Provisioning in Oracle Database Environments. | Kevin Closson's Blog: Platforms, Databases and Storage
https://kevinclosson.net/2015/07/14/this-is-not-glossy-marketing-but-you-still-wont-believe-your-eyes-emc-xtremio-4-0-snapshot-refresh-for-agile-test-dev-storage-provisioning-in-oracle-database-environments
Kevin Closson's Blog: Platforms, Databases and Storage. Platform, Database and Storage Topics. Papers, Webcasts, etc. Announcing SLOB 2.3. Tarry Not, Get It While It’s Hot! Announcing “SLOB Recipes”. This Is Not Glossy Marketing But You Still Won’t Believe Your Eyes. EMC XtremIO 4.0 Snapshot Refresh For Agile Test / Dev Storage Provisioning in Oracle Database Environments. July 14, 2015. Although this is a silent motion picture I think it will speak volumes–or at least 1,000 words. No storage array on th...
My Oracle World: _direct_read_decision_statistcs_driven, _small_table_threshold and direct path reads on partitioned tables in 11.2.0.3 (Part 2)
http://oracle-tech.blogspot.com/2014/04/directreaddecisionstatistcsdriven.html
Wednesday, April 09, 2014. Direct read decision statistcs driven, small table threshold and direct path reads on partitioned tables in 11.2.0.3 (Part 2). This is continuation of my last post. Regarding direct path reads on partitioned tables in Oracle 11.2.0.3. To recap, the behavior I observed is that direct path reads will be performed if number of blocks for all partitions that will be accessed exceeds small table threshold value. Is lower than 200. What is direct read decision statistics driven.
My Oracle World: Find the enabled events using ORADEBUG EVENTDUMP
http://oracle-tech.blogspot.com/2014/03/find-enabled-events-using-oradebug.html
Saturday, March 15, 2014. Find the enabled events using ORADEBUG EVENTDUMP. Just a quick note on how to use ORADEBUG in order to find events that are enabled on system or session level. Starting from Oracle 10.2 you could use ORADEBUG EVENTDUMP in order to get all events enabled either on session or system level. (not sure if this is available in 10.1). Where level is either system, process or session:. For demonstration purposes I will set three events, two on session and one on system level. This note ...
SLOB 2.3 User Guide | Kevin Closson's Blog: Platforms, Databases and Storage
https://kevinclosson.net/2015/07/10/slob-2-3-user-guide
Kevin Closson's Blog: Platforms, Databases and Storage. Platform, Database and Storage Topics. Papers, Webcasts, etc. SLOB 2.3 Is Getting Close! Announcing SLOB 2.3. Tarry Not, Get It While It’s Hot! SLOB 2.3 User Guide. July 10, 2015. SLOB 2.3 is releasing within the next 48 hours. In case anyone wants to read about all the new features here is a link to the SLOB 2.3 User Guide:. SLOB 2.3 User Guide (pdf). Responses to “SLOB 2.3 User Guide”. Feed for this Entry. Leave a Reply Cancel reply. This disclaim...
April | 2016 | Rodrigo Righetti DBA
https://righettidba.com/2016/04
So they say :). Everything in excess is bad. Except Ice Cream :). April 19, 2016. April 26, 2016. Unfortunately this feature is abused, has always been and I’m afraid it always will, just google about this subject and you will see the number of posts about monitoring indexes or the cost to maintain them and still on almost every database we perform an assessment (Health-Check) we see this issue. Continue reading →. And by the way SQL is a program language. April 10, 2016. April 26, 2016. My postings refl...
martincarstenbach.wordpress.com
The RAC Book « Martins Blog
https://martincarstenbach.wordpress.com/the-rac-book
Trying to explain complex things in simple terms. Oracle's Optimiser blog. I am speaking…. Enter your email address to subscribe to this blog and receive notifications of new posts by email. Join 3,337 other followers. Content is provided "as-is" without guarantee or warranty that it works-if you find an article useful, test first! Although it has affected me in other ways too I am grateful for the delay with Oracle 12c, which offered the book a much extended shelf life. Looking it up now reveals tha...
Ivan Kartik - Oracle and Linux Blog -
http://ivan.kartik.sk/index.php?controller=blog&action=view&category=oracle
Ivan Kartik - Oracle and Linux Blog. Bratislava, Slovak Republic. Hadoop and Big Data. ACFS issue with latest UEK3 kernels on OEL 7/RHEL 7. New package dependency for OPatch utility. Upgrade to 12c: Put a spotlight on Database client. A misleading error message. Oracle EM Cloud Control 12c: Oracle Agent Error UploadMaxDiskUsedPct: 98. Redhat Enterprise Linux 7.2 and Oracle Enteprise Linux 7.2 released. Configuring automatic startup of Oracle Database under systemd on RHEL 7/OEL 7/CentOS 7. 02 June, 2016.
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External Table
Luca's blog on databases, data platforms, performance. Friday, September 29, 2017. Performance Analysis of a CPU-Intensive Workload in Apache Spark. This post is about techniques and tools. For measuring and understanding CPU-bound and memory-bound. Workloads in Apache Spark. You will find examples applied to studying a simple workload consisting of reading Apache Parquet files into a Spark DataFrame. Why are the topics discussed here relevant. Many workloads for data. Utilization of CPU cycles. That mod...
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