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Our company uses DB2 zOS almost exclusively for dynamic SQL workloads. Our management expects that DB2 zOS also has high availability regarding DDL changes in this application szenario. If you intend to perform DDL changes in this environment duri...
Add more granularity to commands -START PROFILE and -STOP PROFILE
Summary: Enable a new keyword PROFILEID(list-of-profile-IDs) for the -START PROFILE and -STOP PROFILE commands.----Currently, the activation of profiles can be performed by a -START PROFILE command, which in turn activates all profiles that have S...
almost 4 years ago
in Db2 for z/OS
Not under consideration
Provide better instrumentation for contention between DDL and statement cache
When attempting to execute DDL, it is very difficult to determine what the in-use is, and what in the cache is holding the resource. There needs to be better instrumentation to determine what is blocking successful DDL.
Compress statement text before insert in Dynamic Statement Cache
GGDB212006 'Compress' statement text of dynamic SQL statements by removing all unnecessary blanks before inserting in DSC. As a consequence statements have to be 'compressed' before comparing it to statements in DSC
The absence of report class in DB2 SMF record 101 is cumbersome for capacity management. Report Class is used for workload reporting and accounting. To match SMF 72 (values by report class) with SMF 101 (values by thread, i.e. for userid and other...
As mentioned in Case TS004024647 there are some situations where inserts in lob structures do not provide the expected performance. Instead they cause massive CPU consumption in the Coupling Facility for the spacemap search. The problem is excessi...
Most of our tables that are created before DB2 V8 (and even some created later than that) uses the primary key as the partitioning key. The resulting partitioning key therefore consists of many columns, but the significant columns for partitioning...
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