deadlock in sybase with example

In database implementation, the locking mechanism is used to control concurrent database access to ensure database access correctness. According to definition: Locking is a concurrency control mechanism that ensures data consistency between the same

In the database implementation, the locking mechanism is used to control the concurrent access of the database to ensure the correctness of database access. By definition: Locking is a concurrency control mechanism that ensures that data is

When I execute a scheduler task in sql2005, try out: the transaction (process ID 86) and another process are deadlocked on the lock resource, and have been selected as the deadlock victim. Run the transaction again. After finding the information on

In fact, the deepest reason for all deadlocks is: resource competition performance 1:A user a accesses Table A (locking table A) and then accesses Table BAnother user B accesses table B (Table B is locked) and then attempts to access TableAt this

The deepest cause of all deadlocks is: resource competition performance 1:A user a accesses Table A (locking table A) and then accesses Table BAnother user B accesses table B (Table B is locked) and then attempts to access Table At this time, user a

Performance case 02 -- sybase connection blocking, 02 sybase Symptom:Recently, a problem was reported on the site. during the approval process, the system often gets stuck. The whole system is useless and the browser access is in the loading state.

In the database application system of online transaction processing (OLTP), the concurrency of multi-user and multi-task is one of the most important technical indexes. In order to improve concurrency, most of the RDBMS are now using lock technology.

We know that sybase SQL Server uses Transaction to track changes in all databases. A transaction is the unit of work of SQL Server. One transaction contains one or more T-SQL statements that are executed as a whole. Each database has its own

Supported Locking MechanismFull page lockFull-page locking is a new term and also a type of locking supported by ASEAdaptive Server Enterprise in the past. This type has the following features: locking all accessible pages at the page level; When

The concept of the first part of the lock I. Type of lockASE has three types of blockade: Exclusive lock (exclusive lock), abbreviated as x Lock), shared lock (share lock, abbreviation s), update lock (update lock, short U lock). The compatibility