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- Both solutions use IBM's Variable Stripe RAID and FlashCore technology to provide high performance, reliability, availability, and endurance.
Oracle SQL tuning with SQL Plan Management
Regression in SQL plans are a frequent cause for performance related incidents when the cost-based optimizer comes up with a new plan due to changes in data distribution, statistics, or binds. While most organizations have very strict processes for changes to applications or infrastructure, the CBO is most often left alone, accepting that SQL execution performance could change at any time. But with SQL Plan Management it does not take much effort to implement a process that makes changes to SQL plans manageable. It starts with monitoring regression in execution times, capturing baselines, auto pre-evaluating potentially better plans, and documenting information needed to accept the change. We will not only cover how SPM works, but also how you can start using it in your organization today.
Oracle 11G SCAN: Concepts and Implementation Experience Sharing
Single Client Access Name is a concept that makes database deployment easy on Oracle Database 11g R2 grids and complete the level of abstraction from the application perspective. Starting with the understanding of why this component is vital in the 11g grid infrastructure, this presentation walks through the main concepts of SCAN. You will learn how to plan and implement SCAN, what areas to be careful with, and how to monitor SCAN infrastructure and make sure it works as expected.
Pluggable database tutorial 2
This document is a tutorial on managing pluggable databases in Oracle 12c. It discusses how to rename, manage, and drop pluggable databases. It also covers security topics like common vs local users and roles, and how privileges are handled between the CDB root and pluggable databases. The tutorial demonstrates renaming a pluggable database called "TEST" to "new", managing tablespaces and datafiles between the root and pluggable databases, and creating both common and local users and roles.
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This document provides advanced performance tuning tips for databases. It discusses challenges of tuning like SQL statements being hard to tune and requiring expertise. It recommends using response time analysis to identify statements for tuning by examining wait events and times. Details about SQL like execution plans, metrics, indexes and statistics should be gathered. The SQL can then be tuned by looking for performance inhibitors and making small changes. Several case studies are presented on tuning specific SQL statements and the benefits of monitoring are discussed.
Migrating to Oracle Database 12c: 300 DBs in 300 days.
For a customer in Switzerland, we are in process of migrating 400 databases to 12c. We have migrated 300 so far, and we have had good and bad surprises. This session will show a few scenarios that we faced during the upgrade project.
3 ways to reduce Oracle license costs
IBM POWER systems offer three ways to reduce Oracle licensing costs compared to x86 systems:
1. Oracle licensing on Power is based on the number of cores assigned to the Oracle partition, not the total physical cores.
2. Power systems are twice as fast as x86 according to Oracle benchmarks, so fewer cores are needed to get the same performance.
3. IBM FlashSystems can reduce wait times for data, meaning fewer cores are needed to avoid CPUs sitting idle waiting for data.
An example showed potential savings of over £530,000 per year by moving from 32 physical cores on x86 to 10 cores on Power with FlashStorage.
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Oracle 11G SCAN: Concepts and Implementation Experience Sharing
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More from Franck Pachot
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Here are the slides from the YugabyteDB Japan Meetup in Feb 2023
A similar demo was recorded at: https://youtu.be/2aJM4bdLU7w?t=2589
Oracle dbms_xplan.display_cursor format
This document provides examples of using different format parameters with the DBMS_XPLAN.DISPLAY_CURSOR procedure to customize the output. Key information displayed includes execution statistics, predicates, projections, outlines, and indications of adaptive plans.
19 features you will miss if you leave Oracle Database
Today, the choice of the database technology is in the hands of the developers, and Open Source alternatives look appealing. Many talks and papers show the growing features of MySQL or PostgreSQL, which competes with the commercial RDBMS. But do not forget the core features that are there for decades. They may not be there, or less efficient, in those alternative solutions. Let’s show those basic features, with demos: in-place updates, cursor sharing, guaranteed disk writes, advanced materialized views, IOT, wait events, online operations,… Many were already in Oracle 30 years ago and we take them for granted. We may not realize what we will miss when going to another RDBMS.
Oracle Database on Docker
The presentation I did at UKOUG Tech18 about what I learned when trying to get a solution for the 'we want to run Oracle on Docker' requirement.
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Multitenant architecture is available even without Oracle's multitenant option. In this session take a look at the overhead and the 12.2 new features so that you can choose among single-tenant or non-container databases. These features include agility in data movement, easy flashback, and fast upgrade.
Les bases BI sont-elles différentes?
Il y a souvent des difficultés dans la communication entre les équipes d’exploitation et les équipes
de développement. Les enjeux ne sont pas les mêmes: les uns ont pour mission de stabiliser
le système, les autres au contraire de le faire évoluer. Ces incompréhensions sont encore plus
fortes avec les équipes BI, car les bases BI ont des besoins très différents des applications traditionnelles.
En expliquant ces différences, j’espère amener à une meilleure compréhension entre
les équipes. C’est aussi l’occasion de parler des technologies récentes qui adressent les besoins
BI: Exadata, In-Memory, réplication temps réel,…
Oracle in-Memory Column Store for BI
Oracle In-Memory option to improve analytic queries
In-Memory is now the trend for database editors. But they do not implement in-memory storage for the same reason nor the same architecture. Oracle In-Memory option directly addresses BI reporting. Oracle has always favored an hybrid approach where we can query the OLTP database (from Oracle 6 the reads do not block the writes) and the In-Memory approach follows the same philosophy: run efficient analytic queries on OLTP databases. Their first approach to columnar storage was bitmap indexes in 8i, which were very efficient to support ad-hoc queries but not compatible with an OLTP workload. Then came the Exadata SmartScan and Hybrid Columnar Compression that was still addressing datawarehouses load and reporting.
The 12c In-Memory option now gives columnar and in-memory efficiency directly on the OLTP database, without changing any design or code. A demo will show how this option can be used.
Testing Delphix: easy data virtualization
The document summarizes the author's testing of the Delphix data virtualization software. Some key points:
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- It works by maintaining incremental snapshots of source databases and virtualizing the data access. Copies can be provisioned in minutes and rewound to past points in time.
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12c SQL Plan Directives
The document summarizes how SQL Plan Directives in Oracle 12c can help address issues caused by cardinality misestimation in the optimizer. It provides an example where the optimizer underestimates the number of rows returned by a query on a table due to not having statistics on correlated columns. In 12c, a SQL Plan Directive is automatically generated after the first execution to capture this misestimation. On subsequent queries, the directive can be used to provide more accurate cardinality estimates through automatic reoptimization or dynamic sampling.
Star Transformation, 12c Adaptive Bitmap Pruning and In-Memory option
Besides adaptive joins and adaptive parallel distribution, 12c comes with Adaptive Bitmap Pruning. I’ll describe the case it applies to and which is often not well known: the Star Transformation
CBO choice between Index and Full Scan: the good, the bad and the ugly param...
Usually, the conclusion comes at the end. But here I will clearly show my goal: I wish I will never see the optimizer_index_cost_adj parameters again. Especially when going to 12c where Adaptive Join can be completely fooled because of it. Choosing between index access and full table scan is a key point when optimizing a query, and historically the CBO came with several ways to influence that choice. But on some system, the workarounds have accumulated one on top of the other – biasing completely the CBO estimations. And we see nested loops on huge number of rows because of those false estimations.
Oracle Parallel Distribution and 12c Adaptive Plans
Parallel Distribution and 12c Adaptive Plans
In the previous newsletter we have seen how 12c can defer the choice of the join method to the first execution. We considered only serial execution plans. But besides join method, the cardinality estimation is a key decision for parallel distribution when joining in parallel query. Ever seen a parallel query consuming huge tempfile space because a large table is broadcasted to lot of parallel processes? This is the point addressed by Adaptive Parallel Distribution.
Once again, that new feature is a good occasion to look at the different distribution methods.
Oracle NOLOGGING
The document discusses various data modification operations and how much redo is generated for each. It shows that inserts, deletes, updates, and DML on indexed tables can generate significant redo, while direct path inserts on NOLOGGING tables can minimize redo generation. The document also explains why some redo is always needed even for temporary changes, to support functions like media recovery and standby databases.
Oracle table lock modes
This document discusses Oracle table lock modes, including:
- There are 6 lock modes including share (S) and exclusive (X) that have multiple names like row share (RS) and row exclusive (RX).
- Locks can be acquired at the table level (TM locks) or row level (TX locks). TM locks can be in row share/exclusive modes.
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Dbvisit replicate: logical replication made easy
Demo of Dbvisit replicate setup at SOUG Lausanne.
http://screencast-o-matic.com/u/nTb6/dbvisit-repattack-setup
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19 features you will miss if you leave Oracle Database
12cR2 Single-Tenant: Multitenant Features for All Editions
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Star Transformation, 12c Adaptive Bitmap Pruning and In-Memory option
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CBO choice between Index and Full Scan: the good, the bad and the ugly param...
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An English 🇬🇧 translation of a presentation to the speech I gave about the main changes brought by CCS TSI 2023 at the biggest Czech conference on Communications and signalling systems on Railways, which was held in Clarion Hotel Olomouc from 7th to 9th November 2023 (konferenceszt.cz). Attended by around 500 participants and 200 on-line followers.
The original Czech 🇨🇿 version of the presentation can be found here: https://www.slideshare.net/slideshow/hlavni-novinky-souvisejici-s-ccs-tsi-2023-2023-1695/269688092 .
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https://www.wask.co/ebooks/digital-marketing-trends-in-2024
Feeling lost in the digital marketing whirlwind of 2024? Technology is changing, consumer habits are evolving, and staying ahead of the curve feels like a never-ending pursuit. This e-book is your compass. Dive into actionable insights to handle the complexities of modern marketing. From hyper-personalization to the power of user-generated content, learn how to build long-term relationships with your audience and unlock the secrets to success in the ever-shifting digital landscape.
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This slide deck presents DLHT, a concurrent in-memory hashtable. Despite efforts to optimize hashtables, that go as far as sacrificing core functionality, state-of-the-art designs still incur multiple memory accesses per request and block request processing in three cases. First, most hashtables block while waiting for data to be retrieved from memory. Second, open-addressing designs, which represent the current state-of-the-art, either cannot free index slots on deletes or must block all requests to do so. Third, index resizes block every request until all objects are copied to the new index. Defying folklore wisdom, DLHT forgoes open-addressing and adopts a fully-featured and memory-aware closed-addressing design based on bounded cache-line-chaining. This design offers lock-free index operations and deletes that free slots instantly, (2) completes most requests with a single memory access, (3) utilizes software prefetching to hide memory latencies, and (4) employs a novel non-blocking and parallel resizing. In a commodity server and a memory-resident workload, DLHT surpasses 1.6B requests per second and provides 3.5x (12x) the throughput of the state-of-the-art closed-addressing (open-addressing) resizable hashtable on Gets (Deletes).
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During this demo, the founders of Secludy will demonstrate how their system utilizes Milvus to store and manipulate embeddings for generating privacy-protected synthetic data. Their approach not only maintains the confidentiality of the original data but also enhances the utility and scalability of LLMs under privacy constraints. Attendees, including machine learning engineers, data scientists, and data managers, will witness first-hand how Secludy's integration with Milvus empowers organizations to harness the power of LLMs securely and efficiently.
Building Production Ready Search Pipelines with Spark and Milvus
Spark is the widely used ETL tool for processing, indexing and ingesting data to serving stack for search. Milvus is the production-ready open-source vector database. In this talk we will show how to use Spark to process unstructured data to extract vector representations, and push the vectors to Milvus vector database for search serving.
Astute Business Solutions | Oracle Cloud Partner |
Your goto partner for Oracle Cloud, PeopleSoft, E-Business Suite, and Ellucian Banner. We are a firm specialized in managed services and consulting.
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This presentation delves into the development of a system designed to mimic Galileo's Open Service signal using software-defined radio (SDR) technology. We'll begin with a foundational overview of both Global Navigation Satellite Systems (GNSS) and the intricacies of digital signal processing.
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zkStudyClub - LatticeFold: A Lattice-based Folding Scheme and its Application...
Folding is a recent technique for building efficient recursive SNARKs. Several elegant folding protocols have been proposed, such as Nova, Supernova, Hypernova, Protostar, and others. However, all of them rely on an additively homomorphic commitment scheme based on discrete log, and are therefore not post-quantum secure. In this work we present LatticeFold, the first lattice-based folding protocol based on the Module SIS problem. This folding protocol naturally leads to an efficient recursive lattice-based SNARK and an efficient PCD scheme. LatticeFold supports folding low-degree relations, such as R1CS, as well as high-degree relations, such as CCS. The key challenge is to construct a secure folding protocol that works with the Ajtai commitment scheme. The difficulty, is ensuring that extracted witnesses are low norm through many rounds of folding. We present a novel technique using the sumcheck protocol to ensure that extracted witnesses are always low norm no matter how many rounds of folding are used. Our evaluation of the final proof system suggests that it is as performant as Hypernova, while providing post-quantum security.
Paper Link: https://eprint.iacr.org/2024/257
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Freshworks creates AI-boosted business software that helps employees work more efficiently and effectively. Managing data across multiple RDBMS and NoSQL databases was already a challenge at their current scale. To prepare for 10X growth, they knew it was time to rethink their database strategy. Learn how they architected a solution that would simplify scaling while keeping costs under control.
Salesforce Integration for Bonterra Impact Management (fka Social Solutions A...
Sidekick Solutions uses Bonterra Impact Management (fka Social Solutions Apricot) and automation solutions to integrate data for business workflows.
We believe integration and automation are essential to user experience and the promise of efficient work through technology. Automation is the critical ingredient to realizing that full vision. We develop integration products and services for Bonterra Case Management software to support the deployment of automations for a variety of use cases.
This video focuses on integration of Salesforce with Bonterra Impact Management.
Interested in deploying an integration with Salesforce for Bonterra Impact Management? Contact us at sales@sidekicksolutionsllc.com to discuss next steps.
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Webinar Recording: https://www.panagenda.com/webinars/hcl-notes-and-domino-license-cost-reduction-in-the-world-of-dlau/
The introduction of DLAU and the CCB & CCX licensing model caused quite a stir in the HCL community. As a Notes and Domino customer, you may have faced challenges with unexpected user counts and license costs. You probably have questions on how this new licensing approach works and how to benefit from it. Most importantly, you likely have budget constraints and want to save money where possible. Don’t worry, we can help with all of this!
We’ll show you how to fix common misconfigurations that cause higher-than-expected user counts, and how to identify accounts which you can deactivate to save money. There are also frequent patterns that can cause unnecessary cost, like using a person document instead of a mail-in for shared mailboxes. We’ll provide examples and solutions for those as well. And naturally we’ll explain the new licensing model.
Join HCL Ambassador Marc Thomas in this webinar with a special guest appearance from Franz Walder. It will give you the tools and know-how to stay on top of what is going on with Domino licensing. You will be able lower your cost through an optimized configuration and keep it low going forward.
These topics will be covered
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- Understanding the DLAU tool and how to best utilize it
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