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Advanced diagnostic information for Db2 for z/OS

Product Documentation


Db2 Diagnosis Guide and Reference is no longer part of Db2 for z/OS documentation. Part of the content is in the IBM Documentation website. The remainder of the content is in techdocs that are available only to users with a Db2 for z/OS license.


You can find most of the information that was available in previous versions of the Db2 Diagnosis Guide and Reference manual on the IBM Documentation website, without restriction. That information is in the troubleshooting section of IBM Db2 for z/OS Documentation.

The remaining information from the Db2 Diagnosis Guide and Reference manual is available only to users who have licenses for Db2 12 or Db2 13. The information is provided in the following techdocs:

Each of those techdocs contains a document that includes the following  topics:

  • Control block linkages
  • CSECT descriptions
  • Data organization
  • Database descriptor (DBD) formats
  • Directory and catalog diagrams
  • Directory formats
  • File page set formats
  • Index page set formats
  • Interface for accessing Db2 agent and statement-level storage
  • Internal catalog table formats
  • Mappings of XML string IDs to common XML string names
  • Object ID (OBID) cross-reference
  • Program overview for diagnosis and troubleshooting
  • Service task plan names
  • Subcomponent and resource managers
  • Subcomponent descriptions
  • System-agent correlation IDs
  • System flow of control

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Document Information

Modified date:
07 June 2022