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Db2 12 - Introduction - Guidelines for data reorganization - IBM When data becomes unorganized or fragmented, you need to consider reorganizing your table spaces and index spaces You need to consider the following situations to evaluate when data reorganization is necessary: In simple table spaces, dropped tables use space that is not reclaimed until you reorganize the table space
When to REORG on Db2 for z OS - Db2expert. com The RUNSTATS utility will collect statistics based upon options set for table space, tables, columns, and indexes The following is an example of an extremely common RUNSTATS utility control statement that gathers the minimal base line statistics for a table space, associated table, and associated indexes
Chapter 2. Reorganizing Db2 data - Db2 for z OS Utilities in Practice . . . REORG is a utility for the maintenance of application data and indexes There are a number of reasons for running this utility, but some of the most common include keeping data organized for application performance, applying changes to the table space schema, formatting data rows, or redistributing and discarding of data rows
Db2 12 - Utilities - Determining whether an object requires . . . - IBM To determine whether an object requires reorganization, use any of the following approaches: Reorganize table spaces or partitions that are in REORG-pending status Use the DISPLAY DATABASE RESTRICT command to display those table spaces and partitions that require reorganization
Db2 12 - Utilities - REORG TABLESPACE - IBM You can use the REORG TABLESPACE utility in conjunction with z OS® DFSMS data set encryption to encrypt or decrypt table spaces and indexes REORG TABLESPACE always allocates new Db2 -managed data sets unless the REUSE option is specified
Db2 13 - Utilities - Improving REORG TABLESPACE performance - IBM RETRY allows an online REORG that is unable to drain the objects that it requires so that Db2 can try again after a set period (RETRY_DELAY) During the RETRY_DELAY period, all the objects are available for read-write access in the case of SHRLEVEL CHANGE
How to Tell When a Table Reorg is Needed - DataGeek. blog Reorgchk is a DB2 utility that calculates a number of formulas to determine what kinds of reorgs are needed on what tables You can run reorgchk on a single table, on a schema, or on all tables in a database