Db2 for z/OS Know your Limits

The Db2Night Show z/OS Edition Z99

Db2 12 Continuous Delivery - Deployement - Db2 12 Agile -
September 20th, 2019

Video replay

dbisoftware Webinars

Webinar präsentiert von SEGUS & SOFTWARE ENGINEERING with:

  • Martin Hubel, IBM Gold Consultant & IBM Champion for IM

  • Roy Boxwell, Senior Software Architect

In this presentation I will show and explain the current number of limits within Db2 on z/OS:

Starting with relatively basic simple things like DSSIZE or PIECESIZE. Moving on to Linear Dataset limits (32 for segmented spaces, 254 for LOB). We then will have a quick look at how the COPYPOOL is looking before diving off to the world of PBGs, where you must be aware of MAXPARTITIONS among other things. Then we will review SEQUENCES and Numeric Primary Key usage before finally delving into the abstract limit of Db2 within the Db2 engine including DBATs etc.

1.  DSSIZE or PIECESIZE among other basic simple things

2.  Linear Dataset limits (32 for segmented spaces, 254 for LOB)



5.  SEQUENCES and Numeric Primary Key usage

6.  Abstract limit of Db2 (DBATs etc.)

Speaker biography

Roy Boxwell has more than 31 years of experience in MVS, OS/390, and z/OS environments – 29 of those in Db2. He specializes in installation, migration, and performance monitoring and tuning. Roy leads the SEG development team of SEGUS responsible for the real-time database maintenance solutions. He is also an active participant, speaker and contributor on the IDUG Db2 Listserv and sends out a monthly Db2 z/OS Newsletter.