Comparison of concurrency control (LOCK) between DB2 and Oracle
Comparison of concurrency control (LOCK) between DB2 and Oracle
1 Introduction
The minimal recovery and transaction units in relational databases (DB2, Oracle, Sybase, Informix, and
1 Introduction
In relational databases (Db2,oracle,sybase,informix and SQL Server) the smallest recovery and transaction units are one transaction (transactions), and transactions have acid (atomicity, consistency, isolation, and permanence)
1 Introduction
The minimal recovery and transaction units in relational databases (DB2, Oracle, Sybase, Informix, and SQL Server) are a transaction (Transactions). Transactions are ACID (atomicity, consistency, isolation, and durability) feature. In
Brief introduction
UNIX and Linux users typically check the processes running on their servers to perform problem analysis and to check the resources consumed in the server. This information is useful not only for administrators who perform issues
Hchao, a moderator of the IBMDB2 database Professional Forum, once published a blog post to help DB2DBA avoid performance disasters and achieve high performance. I have summarized a fault diagnosis process for our customers, users, and DB2 experts.
For helpDB2DBA avoids performance disasters and achieves high performance. I have summarized a fault diagnosis process for our customers, users, and DB2 experts. The following describes in detail the 10 most important performance improvement
DB2 is a series of relational database management systems exported by IBM, which serve on different operating system platforms. We will explain the DB2 ten optimization techniques.To help DB2 DBAs avoid performance disasters and get high performance,
Guidance:In recent years, with the improvement of people's living standard, many people have begun to buy insurance, which also accelerates the rapid development of the insurance industry,Insurance IndustryIt is generally oriented to the public, so
1, Concept descriptionThe so-called lock upgrade (lock escalation), is a mechanism of the database, in order to save memory overhead, it will be a large number of high-resource-intensive fine-grained locks into a small amount of relatively small
DB2 supports the following two types of tablespaces:1. System Management Memory table space (Sms-system MANAGED STORAGE)2. Database Management Memory table space (Dms-database MANAGED STORAGE)Comparison of characteristics of SMS and DMS user table
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