If a transaction wants to update one billion tuples, it has to ask the DBMS's lock manager for a billion locks. This will be slow because the transaction has to take latches in the lock manager's internal lock table data structure as it acquires/releases locks. To avoid this overhead...
In Chapter 4 we introduced coroutines and tasks in terms of unit control structures. The purpose of this Chapter is to have a closer look at concurrent program units, the basic ideas underlaying concurrency, and features in programming languages which are necessary to support concurrency. An ...
DBMSstypicallyrelyonlockingbutinatraditionalimplementa- tionwithaseparatelockmanagerthelockmanagerbecomesa bottleneckathightransactionratesasshowninexperimentsby Johnsonetal[15].Longread-onlytransactionsarealsoproblem- aticasreadersmayblockwriters. Thispaperinvestigateshigh-performanceconcurrencycontrol ...
The most popular scheme used in DBMSs developed in the last decade is multi-version concurrency control (MVCC). The basic idea of MVCC is that the DBMS maintains multiple physical versions of each logical object in the database to allow operations on the same object to proceed in parallel. ...
dbms_lob conversion dbo and [] for table name sources ? Correct me Deadlock in tempdb Deadlock on insert and select on same table Deadlock while inserting into sql server table from multiple machines DeadLocks on e_waitPipeNewRow Wait type Decimal (18,5) to NUMERIC (15,6) Conversion Deci...