Search results “Oracle distributed lock timeout”
oracle world - Row Level Lock in Oracle database
Hello friends in this video we learn how the lock occur in database automatically when multiple user modified the same transaction in their session. #RowLevelLock Oracle database Unbeatable,Unbreakable Platform..
Views: 6914 Oracle World
Light Weight Transactions Under Stress  (Christopher Batey, The Last Pickle) | Cassandra Summit 2016
Slides: https://www.slideshare.net/DataStax/light-weight-transactions-under-stress-christopher-batey-the-last-pickle-cassandra-summit-2016 | The Strong Consistency provided by QUORUM reads in Cassandra can still lead to read-write-modify problems when applications want to do things such as guarantee uniqueness or sell exactly 300 cinema tickets. Fortunately Light Weight Transactions (LWT) are designed to solve the problems Strong Consistency can not. In this talk Christopher Batey, Consultant at The Last Pickle, will discuss: - Syntax and semantics: Theoretical use cases - How they work under the covers Then we will go through LWTs in practice: - How do the number of nodes/replicas/data centres affect performance? - How does contention (multiple concurrent queries using LWTs) affect availability and performance? - What consistency guarantees do you get with other LWTs and non-LWTs? - How does LWT timeout differ from normal write timeout? - Use case: LWTs as a distributed lock and how it went wrong 5 times. About the Speaker Christopher Batey Consultant / Software Engineer, The Last Pickle Christopher (@chbatey) is a part time consultant at The Last Pickle where he works with clients to help them succeed with Apache Cassandra as well as a freelance software engineer working in London. Likes: Scala, Haskell, Java, the JVM, Akka, distributed databases, XP, TDD, Pairing. Hates: Untested software, code ownership. You can checkout his blog at: http://www.batey.info
Views: 1924 DataStax
DB2 - Concurrency Control
DB2 - Concurrency Control Watch More Videos at https://www.tutorialspoint.com/videotutorials/index.htm Lecture By: Mr. Nishant Malik, Tutorials Point India Private Limited.
Lecture - 25 Basic 2-Phase and 3-phase commit protocol
Lecture Series on Database Management System by Prof. D. Janakiram, Department of Computer Science and Engineering,IIT Madras. For more details on NPTEL visit http://nptel.iitm.ac.in
Views: 58049 nptelhrd
Discover what your app is waiting with kernel tracing, Francis Giraldeau (Polytechnique Montréal)
TracingSummit2014 System administrators and developers are challenged by understanding the elapsed time of heterogeneous and distributed programs in order to improve response time. Profilers are useful to identify hotspot code in an application, but they do not take the wait time into account. A task can block for a device, a local task using any inter-process communication or a task running on another computer. We present a technique using solely kernel tracing to recover the active path of a computation, crossing machines barrier. The technique uses scheduling, interrupt and network events, but does not require system call tracing nor user space instrumentation. Therefore, this technique works for any programming language, and includes interactions with kernel threads. We show the analysis result of actual use-cases, including shell scripts, RPC request, file server and web app.
Views: 432 DiaMonWorkgroup
Database Lesson #6 of 8 - Database Administration
Dr. Soper gives a lecture on database administration. Topics covered include concurrent access / concurrency control, database security, database backup and recovery strategies, database locking (including optimistic locking, pessimistic locking, and deadlock), and database transactions.
Views: 89830 Dr. Daniel Soper
Two-phase commit protocol
In transaction processing, databases, and computer networking, the two-phase commit protocol is a type of atomic commitment protocol. It is a distributed algorithm that coordinates all the processes that participate in a distributed atomic transaction on whether to commit or abort the transaction. The protocol achieves its goal even in many cases of temporary system failure, and is thus widely utilized. However, it is not resilient to all possible failure configurations, and in rare cases, user intervention is needed to remedy an outcome. To accommodate recovery from failure the protocol's participants use logging of the protocol's states. Log records, which are typically slow to generate but survive failures, are used by the protocol's recovery procedures. Many protocol variants exist that primarily differ in logging strategies and recovery mechanisms. Though usually intended to be used infrequently, recovery procedures compose a substantial portion of the protocol, due to many possible failure scenarios to be considered and supported by the protocol. In a "normal execution" of any single distributed transaction, i.e., when no failure occurs, which is typically the most frequent situation, the protocol consists of two phases: This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video
Views: 24654 Audiopedia
Best Practices for Data Replication Tool Upgrades
DataKinetics' Best Practices Series: Upgrade your DB2 and IMS Data Replication Solutions.
Views: 197 DataKinetics
[CS198.2x Week 1] Paxos & Raft
CS198.2x Blockchain Technology Week 1 CS198.2x Blockchain Technology is the second course in the Blockchain Fundamentals edX program. Sign up today for free or for a professional certificate with the link below. Certificate page: https://www.edx.org/professional-certificate/uc-berkeleyx-blockchain-fundamentals Blockchain Fundamentals was developed by Blockchain at Berkeley, in collaboration with UC Berkeley EECS department, MOOCLab, and BRCOE for edX. Blockchain at Berkeley: https://blockchain.berkeley.edu/ View the complete playlist: https://www.youtube.com/playlist?list=PLZvgWu86XaWkpnQa6-OA7DG6ilM_RnxhW&disable_polymer=true
How To Kill All Database Processes On SQL Server
SQl management studio provides lot of facilities to manage SQL processes. The “Activity monitor screen” which will show you some very useful and important information about SQL processes. It will show you all active processes, there status, number of open transactions for each process, the application by which the process is generated, Wait time CPU and memory utilisation, and the host name, means the host or the machine by which the process is initiated etc. If a process is hanging, it will show the process icon with an hour glass. Refresh it several times, sometimes the icon will turn to sleep mode if the process completes its execution. If the icon remains an hour glass, the process may be hanging. Use other info as well to decide if the process is really hanging. If you double click on the process ID it will show the SQL stamen subjected to the execution of the process. If a process is hanging you can identify which application has originated the process, which SQL stamen is hanging and even more from which machine or the host the process is initiated If some application users are complaining about uneven slowness, uneven timeouts etcetera, the reason behind may be one or more processors are hanging. What can you do now? You can restart the SQL server or the service which will disconnect all databases and all applications disturbing all the users. Or otherwise you can take the database to off line and bring it back to online. Or you can disconnect all connections to the database. The disturbance may be lesser than the previous case but still lot of applications and users can be disturbed, especially in an industrial setup. And still you do not know the real reason for the slowness or the malfunctioning as well. So what can you do? Go and examine the processors. Identify exactly which process is hanging. And most probably you will be identifying how and why. So you can find permanent solution. But the immediate solution is you can kill the troubling process or the few. It will solve the issue with minimum disturbance immediately. After identifying the correct process, you can right click on the process ID and click on ‘Kill process’ button. It will kill the selected process. You can kill processors using SQL statements and, using SQL commands you can kill all processors at once as well. Code for Killing Processes Individually USE master go DECLARE @dbname sysname SET @dbname = 'YourDB' EXECUTE ('KILL 53') Code for killing all Processes USE master go DECLARE @dbname sysname SET @dbname = 'YourDB' DECLARE @spid int SELECT @spid = min(spid) from master.dbo.sysprocesses where dbid = db_id(@dbname) WHILE @spid IS NOT NULL BEGIN EXECUTE ('KILL ' + @spid) SELECT @spid = min(spid) from master.dbo.sysprocesses where dbid = db_id(@dbname) AND spid @spid END
Views: 6117 Rohan Mehtha
NUMA remote (foreign) memory access overhead for SQL Server In-Memory OLTP Memory optimized Tables
http://www.sqlworkshops.com For further information please read: http://www.sqlvideo.com/AllVideos/NUMA-remote-memory-access-overhead-on-Windows-and-SQL-Server To receive the example scripts used in the video, subscribe to our mailing list: https://newsletter.sqlworkshops.com For in-person workshops check out our schedule: http://www.sqlworkshops.com/schedule or contact us for a customized, onsite workshop http://www.sqlworkshops.com/contact To read some feedback from previous workshop participants, go to http://www.sqlworkshops.com/feedback
Views: 503 SQLWorkshops
Google I/O 2012 - SQL vs NoSQL: Battle of the Backends
Ken Ashcraft, Alfred Fuller Google App Engine now offers both SQL and NoSQL data storage -- but which is right for your application? Advocates of each try to settle the issue once and for all, and show some of the tricks for getting the most out of each. For all I/O 2012 sessions, go to https://developers.google.com/io/
Views: 358862 Google Developers
Optimizing Applications, Schemas, and Query Design on Cloud Spanner (Cloud Next '18)
Cloud Spanner is a powerful product, but many users do not maximize its benefits. This talk highlights best practices, strategies for optimizing applications and workloads, and ways to improve performance and scalability. Through live demos, attendees will witness real-time speed-ups of transactions, queries, and overall performance. Additionally, this talk explores techniques for monitoring Cloud Spanner to identify performance bottlenecks. Come learn how to save thousands of dollars and maximize performance with Cloud Spanner. Event schedule → http://g.co/next18 Watch more Infrastructure & Operations sessions here → http://bit.ly/2uEykpQ Next ‘18 All Sessions playlist → http://bit.ly/Allsessions Subscribe to the Google Cloud channel! → http://bit.ly/NextSub
openEHR Day - November 22, 2017 - Introduction and keynote "The Postmodern EHR"
Introduction, Jon Hoeksma CEO at Digital Health Intelligence Keynote: "The Postmodern EHR", Tomaz Gornik, CEO, Marand d.o.o. Want to learn more about Think!EHR Platform™ click here: http://bit.ly/2B8hepJ
Views: 1211 Marand d.o.o.
Basic Time Stamp Ordering Protocol
Learn about Basic Time Stamp Ordering Protocol
What's Adaptive Query Processing in SQL Server? (Dear SQL DBA Episode 21)
Learn about emerging features to speed up SQL Server queries. Kendra talks about automatic index tuning and speculates about Adaptive Query Processing. Prefer a readable transcript? Get it here: https://www.littlekendra.com/2016/11/03/whats-adaptive-query-processing-dear-sql-dba-episode-21/
Views: 1056 SQL Workbooks
Transaction Model for web services & Digital Business Ecosystems - OEN - Dr Razavi Part2/3
Transaction Model for web services & Digital Business Ecosystems By Dr Amir Reza Razavi University of Surrey Nested compositions and level of centralisations Loosely coupled, dynamic environment and delegations Data dependencies, partial results and compensations Platforms failures, Forward Recovery, Contingencies plan, Timeouts
Nimble Storage Introduces the Predictive Flash Platform and New All Flash Arrays
The Nimble Storage predictive flash platform ensures non-stop availability, unrivalled performance and cloud-like agility for your business, closing the app data gap. The platform combines Nimble's InfoSight analytics, unified flash fabric and timeless storage to ensure greater than 99.9997% uptime with 33% to 66% lower TCO compared to the competition. InfoSight predictive analytics prevents issues, predicts future needs, simplifies planning and avoids downtime by constantly collecting and monitoring huge amounts of data from its intelligent sensors. Nimble Storage unified flash fabric combines all flash and adaptive flash arrays in a single architecture for sheer performance, scalability and resilient storage. Timeless storage offers unwavering customer commitment, guarantees for all-inclusive software licensing, support and a capex or storage-on-demand pricing model. Nimble Storage's new 4U chassis with superior controllers and backplane, offers up to 2PB of effective capacity and 1.2M IOPS in just 12U! Learn about the new all-flash arrays and how the predictive flash platform can deliver data velocity for your enterprise at https://www.nimblestorage.com?utm_source=youtube
Views: 3761 Nimble Storage
What is Deadlock in OS | Deadlock in OS | Operating System Interview Questions and Answers
What is Deadlock in OS A deadlock is a situation in which two computer programs sharing the same resource are effectively preventing each other from accessing the resource, resulting in both programs ceasing to function. The earliest computer operating systems ran only one program at a time. What is deadlock , Deadlocks in OS , Deadlock , What is deadlock , Deadlocks , Deadlocks , Deadlock Prevention , Avoidance , Detection and Recovery in , What is deadlock in operating system , OPERATING SYSTEMS DEADLOCKS , Methods for Handling Deadlocks , Operating System , OS Interview Questions , Operating System Interview Questions and Answers , Operating System Concepts Interview , Operating System Interview Question and Answers , Operating System Question with Answers , Operating System Technical Interview Question With Answers , operating system interview questions and answers for experienced , operating system interview questions and answers for freshers , DEADLOCK IN OPERATING SYSTEM,Deadlock in Operating System , Deadlock Prevention For more details visit: http://www.wikitechy.com/ Facebook: https://www.facebook.com/wikitechy Twitter: https://twitter.com/WikitechyCom Google Plus: https://plus.google.com/u/0/b/108939953321929485284/108939953321929485284/posts Linked in : https://www.linkedin.com/company/wikitechy Pinterest: https://www.pinterest.com/wikitechy/ Tumblr: http://wikitechy.tumblr.com/
Mike Olson: Opportunities Abound in the Big Data Space [Entire Talk]
Cloudera Co-Founder Mike Olson shares his insights on the present landscape and possible future of big data and the data management industry. In conversation with Ping Li of Accel Partners, Olson also discusses the advantages of building a business on top of open source technologies and the many surprising benefits of competition. View more clips and share your comments at http://ecorner.stanford.edu/authorMaterialInfo.html?mid=3223
Views: 3451 Stanford eCorner
Google Test Automation Conference - 11/11/2015
https://developers.google.com/google-test-automation-conference/2015/ GTAC 2015 will be held at the Google office in Cambridge Massachusetts, on November 10th and 11th, 2015. We will be choosing a diversity of attendees and presenters from industry and academia. The talks will focus on trends we are seeing in industry combined with compelling talks on tools and infrastructure that can have a direct impact on our products. We are committed towards creating a conference that is focused for engineers by engineers. In GTAC 2015 we want to continue to encourage the strong trend toward the emergence of test engineering as a computer science discipline across companies and academia alike.
Views: 8521 GoogleTechTalks
Apps Script Crash Course: ScriptDb
In this episode Arun covers the basics of ScriptDb, a JavaScript object store that's built into Apps Script. He'll demonstrate how to store, retrieve, and query for records, as well cover best practices for organizing your data. You can download the source code of Arun's ScriptDB visualizer application here: https://github.com/entaq/GoogleAppsScript/tree/master/ScriptDbVisualizer
Views: 8411 Google Developers
Lec 19 | MIT 6.033 Computer System Engineering, Spring 2005
Transactions and Consistency View the complete course at: http://ocw.mit.edu/6-033S05 License: Creative Commons BY-NC-SA More information at http://ocw.mit.edu/terms More courses at http://ocw.mit.edu
Views: 9398 MIT OpenCourseWare
RubyConf 2016 - Diving into the Details with DTrace by Colin Jones
RubyConf 2016 - Diving into the Details with DTrace by Colin Jones "Argh, why is this so slow?!" We've all asked questions like this without getting satisfying answers. And so we slog along, finding workarounds and architecting around the slow bits. But what if we had a friend who could see things we can't? Someone who could say whether our guesses were right, and what to look at next? DTrace is that friend, and it's here to help! In this talk, I'll show you how DTrace can answer incredibly general and specific questions about systems performance, and help us to generate new ones. Along the way, we'll see that it's easier to use than you might think!
Views: 598 Confreaks
Code S Ro4 Match 1 Set 6, 2014 GSL Season 1 - Starcraft 2
Zest vs Rain: GOM eXP presents 2014 GSL Season 1 "The GSL" returns with slight change from its old format. GSL has been evaluated as one of the most prestigious StarCraft II league in the world since the release of StarCraft® II: Wing of Liberty™ in 2010. In 2014, the GSL, which has contributed to the global popularity of StarCraft II, will be the sole partner for StarCraft II WCS in Korea and the WCS points will be distributed in the same manner as the other regions. GSL's unique names for the different leagues such as Code S (Premier League), Code A (Challenger League), and Code B (Qualifiers) will be applied to all 3 seasons in 2014. Players who participate in the GSL will receive WCS points which will be applied to the WCS global rankings as well. The 2014 GSL season champions will now receive larger prize for winning it all. GSL Code S Champions will receive 70,000,000 KRW, which is far more than the WCS or GSL prize money payout had been before. This big prize reflects the competitiveness of the players in Korea, and as such, the GSL will be held with more prize money compared to other regions. We received feedbacks from player, teams, and other persons concerned regarding the 2013 WCS Season's prize pool and this too factored into the payout for 2014. Watch live and the rest at: http://twitch.tv/gsl Check out! GSL Global Championship http://gomexp.com/gsl Subscribe! Schedule: https://www.google.com/calendar/embed?src=gomgsl%40gmail.com&ctz=Asia/Seoul Facebook: http://www.facebook.com/officialexp Twitter: http://www.twitter.com/gomexp
Views: 3181 GOM eXP Official
10/01/18  Budget & Finance Committee
Coverage of the Budget & Finance Committee of the Metropolitan Nashville Council, held on October 1, 2018
Views: 64 MetroNashville
HSN | Customer Celebration with Colleen & Geoff 10.30.2016 - 07 PM
Customers select what items make the final cut of this show Prices shown on the previously recorded video may not represent the current price. View hsn.com to view the current selling price.SHOP NOW http://www.hsn.com
Views: 131 HSNtv
#AGDQ2015 Shovel Knight (Any%) by Capndrake
Run starts at 6:58 Watch live: http://www.twitch.tv/GamesDoneQuick Official page: https://gamesdonequick.com/ Runner(s): http://www.twitch.tv/capndrake Official Schedule: https://gamesdonequick.com/schedule Games Done Quick is a series of charity video game marathons. These events feature high-level play by speedrunners raising money for charity. Games Done Quick has teamed up with several charities in its five-year history, such as Doctors Without Borders and the Prevent Cancer Foundation. http://www.doctorswithoutborders.org/ http://preventcancer.org/ Donate here: https://gamesdonequick.com/tracker/donate/12 Donation Tracker: https://gamesdonequick.com/tracker/12 Uploading the runs here for convenience. @runner: Feel free to leave a comment or drop me a message if you want your run removed. @all Drop a comment if there's something wrong. Playlist here: http://youtube.com/playlist?list=PL_NsA72Bgro96PNeBjK7G07qQ1PtCTrVe Subtitles: Barely beta. Chatlog can be turned on/off optionally by en-/disabling captions. Check out the options, especially background and font opacity (transparency). Until youtube fixes their v3 API, they may be distributed across several languages, in alphabetic order.
Views: 12811 Yuuki DeName
Load balancing (computing)
Load balancing is a computer networking method for distributing workloads across multiple computing resources, such as computers, a computer cluster, network links, central processing units or disk drives. Load balancing aims to optimize resource use, maximize throughput, minimize response time, and avoid overload of any one of the resources. Using multiple components with load balancing instead of a single component may increase reliability through redundancy. Load balancing is usually provided by dedicated software or hardware, such as a multilayer switch or a Domain Name System server process. This video is targeted to blind users. Attribution: Article text available under CC-BY-SA Creative Commons image source in video
Views: 216 Audiopedia
Joint Legislative Budget Hearing on Transportation - 01/29/15
Joint Legislative Budget Hearing on Transportation - 01/29/15
Views: 425 nysenateuncut

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