Mysql Slow Delete

When it comes to big data, it has to do with Alibaba. The world's leading E-commerce enterprise, the amount of data processed every day is unmatched by any other company, it is also transforming into a real data company--mysql is an important weapon in the transformation of Alibaba. 　　A database architect who interviewed Ali, who believes Ali has the best performance of open source MySQL, beyond any relational database and NoSQL. In the 2009, Oracle acquired the copyright of MySQL by acquiring Sun, and the industry began to question the use of Oracle ...

51 ago, a DBA colleague feedback, in the day-to-day environment to delete a large slow log file (assuming the file size above 10G), and then execute flush slow logs in MySQL, will find mysqld live. 　　Trying to reproduce the problem today, here's a brief analysis of why. Recurrence Step: 1. Constructs slow log (sets the Long_query_time to 0), 2. Observe delete rm Slow log moment, tps/q ...

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The complete collection of SQL statement operations deserves to be permanently stored the following statements are part of the MSSQL statement and are not available in Access. SQL classification: ddl-data Definition language (create,alter,drop,declare) dml-Data Manipulation Language (Select,delete,update,insert) dcl-Data Control Language (Grant,revoke, Commit,rollback first, briefly introduce the basic statement: 1, Description: Create number ...

MongoDB is currently the best document-oriented free Open-source NoSQL database. If you are preparing to participate in a technical interview for the MongoDB NoSQL database, you might want to look at the following MongoDB NoSQL interview questions and answers. These MongoDB NoSQL interview questions cover the basic concepts of NoSQL databases, replication (Replication), fragmentation (Sharding), Transactions and locks, trace analysis Tools (Profiler), nuances, and logging features. Let's look at the following ...

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March 25, 2014, CSDN Online training: HBase in the application of millet in the practice of a successful conclusion, the trainer is from the Tri Jianwei of millet, he said with the gradual expansion of millet business, especially the arrival of large data era, the original relational database MySQL has been gradually unable to meet the needs, 　　So it's natural to move to NoSQL. CSDN Online training is designed for the vast number of technical practitioners in the online real-time interactive technology training, inviting all industry front-line technical engineers to share their work encountered in the various problems and solutions ...

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"Editor's note" This article author @xidea. Interactive designer, half product manager. Focus on the overall user experience design and product design based on the Internet. This article is reproduced from the author's blog. There are a lot of mobile internet product managers and designers from the traditional internet, we have accumulated some experience, some can continue to use on the mobile side, and some will not work, this may be from the mobile internet and the difference between the traditional internet. Difference 1, terminal equipment Traditional Internet: The main access terminal is the computer. The computer is a highly standardized device, whether it is a Mac array ...