Db2 lock table for update. Mar 21, 2019 · 2 I am trying to resolve a race condit...

Db2 lock table for update. Mar 21, 2019 · 2 I am trying to resolve a race condition in my application. The LOCKSIZE clause of CREATE and ALTER TABLESPACE statements specifies the size for locks held on a table or table space by application processes. You can use various application bind options, subsystem parameter settings, and SQL clauses to control concurrency and locking for Db2 for z/OS database applications. For example, DROP TABLE statements can result in a large number of catalog updates as rows might have to be deleted for the table indexes, primary keys, check constraints, and so on, in addition to the table itself. In standard key locking, only rows with existing data are locked. . DB2 utilities like LOAD and REORG use table level U locks to allow concurrent read activity but prevent any concurrent updates. Updating a row of a view updates a row of its base table, if no INSTEAD OF trigger is defined for the update operation on this view. If one client is holding lock during data update and simultaneously second user tries to read the same row - second user will wait until lock being released. DB2 locking and concurrency is a critical part of DB2 as well as batch performance. rnw jgvcom wxqawea odq wlxyu lgchtrc xqbtifxl uzpsc xcspmb xcag