Db2 12 for z/OS: Enhanced Lock Avoidance in Data Sharing Environments

(Robert Catterall) In the last entry posted to this blog, I described the mechanisms (including PUNC bits and commit log sequence numbers, aka CLSNs) used by Db2 for z/OS for lock avoidance purposes (lock avoidance here refers to a capability whereby Db2 can, in many cases, verify the committed stat

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