November 2015
Beginner to intermediate
248 pages
5h 24m
English
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Understanding locking
In any database system, whenever a client is trying to update a record, it acquires a lock in that record so that another client cannot update the same record. This is done to maintain consistency in RDBMS.
Sometimes, when we perform a bulk update, this locking of records escalates to locking a table, and all access is denied to that particular table. This has an adverse impact on the application's performance. A majority of the application performance issues that arise in the production environment happen due to locking of records or tables. There are various levels of locking in RDBMS depending on the application logic requirement. In my experience as a SQL DBA, I have often observed queries getting timed out while waiting ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.