What is the significance of ILOG FILE 1 SUBFILE 0 DSN CAI.DB2.DB2B.LOG01#0 PAGES 200 PAGES 200? can the 200 be increased? if so will it hold more data?

Document ID : KB000118485
Last Modified Date : 25/10/2018
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Issue:
What is the significance of ILOG FILE 1 SUBFILE 0 DSN CAI.DB2.DB2B.LOG01#0 PAGES 200 PAGES 200? can the 200 be increased? if so will it hold more data?
 
Resolution:
SN CAI.DB2.DB2B.LOG01#0 PAGES 200 describes the dataset where GSS is going to write the DB2 messages. There should be a set of files for each DB2 SSID pages Number of 4K pages to be allocated to the subfile. This value must be 5 or greater. Default: 5 The space requirement for these files is based on the number of ILOG PAGES that has been specified for them to hold. If all the ILOG PAGES can be allocated within the Primary space allocation then there will be no expansion into the secondary extents. Listcat will not show how many ILOG Pages are available in the Virtual file and this is what controls the ILOG full message not how much space is used in the physical VSAM file. If you get an ILOG full message then all the ILOG Pages have been used.