Setting a suitable CICS trace table size for z/VSE
Ingolf24 120000DRN3 Visits (3178)
The CICS service team asked me to post a blog entry related to the CICS trace table size.
The CICS service team often have problems debugging CICS VSE problems because the SIT TRTABSZ value for the internal trace is too small, and they cannot see the problem from the start until the end.
They recommend to allocate a minimum of 4 MB (SIT TRTABSZ=4096) for each CICS system, but be aware that the service team may ask for 10 MB in some situations. The trace table uses 31-bit Partition GETVIS and is allocated when CICS initializes, which is before files are opened etc. Customers can use the GETVIS command output before shutting CICS down to compare the delta trace table size against what is the largest free area above 16 MB and increase the Partition allocation if required.
Mike, thanks for the details.