In the previous chapters, we have understood the various replication concepts. This is not just a theoretical overview of the things that will enhance your consciousness for the next thing to be introduced, but will also introduce you to a broad
Tag: Select the complete sequence process date ready version to generate the calculationPostgreSQL transaction processing and concurrency control:A transaction is the basic unit of work in PostgreSQL and is a user-defined sequence of database
PostgreSQL provides developers with a rich set of tools to manage concurrent access to data. Internally, data consistency is maintained by using a multi-version model (multi-version concurrency control, MVCC). This means that each SQL statement sees
2.4 Adjusting checkpoints and xlogSo far, this chapter has provided insight into how PostgreSQL writes data, in general, what Xlog is used for. Given this knowledge, we can now continue and learn what we can do to make our databases work more
Comparison between PostgreSQL and MySQL
Run the MySQL Command (mysqld) to start the instance. One instance can manage one or more databases. One server can run multiple mysqld instances.
Run the MySQL Command (mysqld) to start the instance. One instance can manage one or more databases. One server can run
Distributed transactions, like local transactions, contain atomicity (atomicity), consistency (consistency), isolation (isolation), and persistence (durability). Two-stage commit is an important method to ensure atomicity in distributed transaction.
2.3 Understanding consistency and data lossIt is not possible to mine PostgreSQL transaction logs without regard to consistency. In the first part of this chapter, we have largely explained the basic idea of the transaction log. You already know
Launch the instance by executing the MySQL command (MYSQLD). One instance can manage one or more databases. A single server can run multiple mysqld instances. An instance manager
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