Database I/O Activity for OSAM Buffer Pools (IMS Systems) view (IDABOSMR)

The Database I/O Activity for OSAM Buffer Pools (IMS Systems) view (IDABOSMR) provides database I/O activity information for OSAM databases, summarized at the buffer pool level.

You can use the IDABOSMR view to analyze I/O information related to buffer pools. The view helps you recognize and solve N-way data sharing problems resulting from badly organized databases, I/O contention, buffer pool sizes and assignments, or buffer cross-invalidation.

Related topic

Manage-IMS-database-activity

IDABOSMR shows I/O totals, rates, and average times for all open OSAM databases.

You can hyperlink to the IDABOSMR view from the:

  • OSAM Buffer Pools option in the IMS Fast Menu (EZIFASTR) and the DBCTL DBA Easy Menu (EZIDBA)
  • OSAM Wrst Hit and Buf Steal fields in the IMS Dashboard view (IMSDASSR)
  • OSAM Bufr Pool Hit Ratio field in the IDASDTLR view
  • Worst OSAM Pool Hit Ratio field in the IDAGDTLR view
  • OSAMPool HitRatio field in the IDAGSUMR and IDASSUMR views

IDABOSMR view

 OSAM    Bufr  Num  Srch  Hit   OSAMCach OSAMCach AvgTime Databases Read  Write
 Pool ID Size  Bufr Rate  Ratio HitRatio Option   In Pool With I/O  Rate  Rate
 OSM4     4096    5  1.94 39.84     0.00 All         0.10 DB1H      16.90  0.00
 (none)   1024    5  0.00  0.00      N/A NoCache                     0.00  0.00
 (none)   2048    5  0.00  0.00      N/A NoCache                     0.00  0.00
 (none)   8192    5  0.00  0.00      N/A NoCache                     0.00  0.00

The following hyperlinks are provided on the view:

Hyperlink from

To access

OSAM Pool ID

Database Activity Detail for an OSAM Buffer Pool (IMS Systems) view (IDABODTR), where you can see a detailed view of the selected buffer pool

Databases with I/O

Database I/O Activity for Databases/Volumes (IMS Systems) view (IDAXSUMR), where you can see the statistics broken down by database volume and VSAM and where you can see more specifically where the I/O is occurring within a specific volume or VSAM component


 

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