shared memory lock

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

Before doing a test, repeatedly executed several times, found the result is the same:1. Single-threaded synchronized is the most efficient (at the time it felt its efficiency should be the worst);2. Atomicinteger efficiency is the most unstable,

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

A shared memory area is a portion of physical memory that is shared by multiple processes. If more than one process maps the region of memory to its own virtual address space, those processes can access the shared memory area directly, allowing

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)

Source Http://www.blogjava.net/sunzhong/articles/297435.html The shared memory area is a part of the physical memory shared by multiple processes. If multiple processes map the memory area to their virtual address space, these processes can

#一. OverviewThe > database locking mechanism simply means that the database is designed to ensure the consistency of the data and to make the various shared resources be ordered by concurrent access. For any kind of database need to have a

Lock Release-Get established happens before relationshipLocks are the most important synchronization mechanism in Java concurrent programming. The lock allows the thread that releases the lock to send a message to the thread that acquires the same

Lock Release-Get established happens before relationshipLocks are the most important synchronization mechanism in Java concurrent programming. The lock allows the thread that releases the lock to send a message to the thread that acquires the same

Lock Release-Get established happens before relationshipLocks are the most important synchronization mechanism in Java concurrent programming. The lock allows the thread that releases the lock to send a message to the thread that acquires the same