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Latch information and more internals information for performance analysis
Detailed information about LATCH to DBA. More information of wait events would be good too like if a statement is waiting for a sequential read, how much the transaction is spending on network time , block concurrency, and so on.
Reproduce Scenario and found to be a expected behavior while CTAS locks syscat.tables session 1 > create table Table1 as (select * from Table_2 ) with data; session 2, query tool > select * from syscat.tables; --> lock waiting
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...
Knowledge center should load content of previous and next articles automatically
When navigating the Knowledge Center, it is necessary to click on the left panel every single article. Some of them are very short to read, and it takes a lot of time to reload the whole page just for a single article. It would be easy if by click...
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...
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...
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...
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