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Understanding DB2®: Learning Visually with Examples
book

Understanding DB2®: Learning Visually with Examples

by Raul F. Chong, Clara Liu, Sylvia F. Qi, Dwaine R. Snow
January 2005
Beginner to intermediate
928 pages
22h 14m
English
IBM Press
Content preview from Understanding DB2®: Learning Visually with Examples

Chapter 16

A1: Uncommitted read applications acquire an IN lock on the table but no row-level locks.
A2: The maximum requester I/O block size is 64K.
A3: You can configure DB2 to create some agent processes when DB2 is started by setting the NUM_INITAGENTS parameter to a value greater than zero.
A4: To ensure the integrity of your database, DB2 writes the log buffers to disk when:
  • One or more transactions commit

  • The log buffer is full

  • One second has elapsed since the last log buffer flush

A5: Lock escalation will occur when:
  • The database lock list becomes full

  • Any one application uses more than the MAXLOCKS percent of the lock list

A6: You can capture table and index statistics:
  • By running the runstats utility

  • When loading data into one of your tables ...

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Publisher Resources

ISBN: 0131859161Purchase book