IMS 12 Selected Performance Topics

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Database performance topics

In this chapter, we provide additional details about database-related performance improvements in IMS.

This chapter contains the following topics:

•Parallel migration to high availability large database (HALDB)

•Archive enhancements

•Online reorganization performance improvements

•OSAM versus VSAM

•Understanding IMS locking for performance

•CICS threadsafe support

•Temporary close of VSAM data sets with new extents

•Tuning database buffer pools using Buffer Pool Analyzer

5.1 Parallel migration to high availability large ...

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