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Differentiate between Read and Write IO performance (Overhead and TransferRate) and optimise accordingly
Background: Db2 is sensitive to IO performance, and compiles access plans accordingly to optimise IO versus CPU costs. At the tablespace level, average Overhead and TransferRate are configured in units of milliseconds. Issue: customers such as our...
Hi, Currently db2ReadLog api gives us the record based on LRI values. We need to pass LRI range(start LRI and end LRI) to the api to get db2 records. There is no other way to get the records using the api. It would be good, if we can query the log...
Add options for "recommend indexes" and "evaluate indexes" explain types to explain_from_section
When running explains from jupyter notebook, I prefer to use EXPLAIN_FROM_SECTION. However for in-depth analysis of indexes, I need the RECOMMEND INDEXES and EVALUATE INDEXES explain modes. These don't seem to exist for EXPLAIN_FROM_SECTION. This ...
Tool db2batch should be able to display Number of rows affected
Often db2batch is used for tuning / benchmarking purposes and very often the number of affected rows is interesting.
Command line tool. 'db2'. provides the option to display the Number of rows affected, db2 -tvmf <SQL-DML-File>
$ db2 -t...
Sometimes the knowledgeCenter is not reacheable or it is not working for different reasons, and the access for the documentation becomes an issue. For this reason, I suggest to have the KnowledgeCenter downloadable as a Docker image, as it was pos...
Syntax diagrams in KnowledgeCenter with links for subsections
The syntax diagrams in 11.5 have been changed for good. They are easier to understand and to follow the lines. However, the navigation in the diagram is still difficult (no improvements yet). One has to use the Find option of the browser to look f...
WLB does not work for Java XA applications in pureScale environment
If WLB is enabled and Java client is involved in XA transaction, jcc driver does not perform work load balancing (WLB), when the Transaction Manger uses Dual or Multi-transport model (for example: IBM MQ and IBM LotusÂ® Domino).
db2set -g DB2INSTDEF instance incorrect install version makes global registry unusable
db2set -g DB2INSTDEF instance incorrect install version makes global registry unusable. This can be caused by an upgrade from Version 9.7 to 10.5 or accidently by someone making a mistake setting an instance from another software version to be DB2...
Appears nodename is limited to 8 characters. The hostname allows for 255 characters. Typically we use server name as nodename and the fully qualified server name with domain as hostname. SF is looking at pushing server names to 15 characters. Is t...
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