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Reduce Time Required for Online(Inplace) Reorg for huge tables
1) Inplace reorg will take time more for the tables with huge data say for example 1 TB 2) To Reduce the time for this we want to avoid full table scan hence we need to look in portions of the data in a table where it is getting fragmented 3) Henc...
Currently you can create NOT ENFORCED primary keys but the optimizer will then always treat these as trusted. This causes problems when the constraint is violated but a filter includes all PK columns since the engine will return only one row even ...
Enabling Restrict on Drop clause logic in create table command for db2 LUW
There is a feature called "Restrict on Drop" that should be used by the database designers while creating a table for the db2 LUW database
1) If a database designer uses this "Restrict on Drop" clause for the creation of the table then the
Warning error code for Db2 tablespace architecture limit
If Db2 tablespace reaches architecture limit of 90%, then there should be a Warning Message write into db2diag.log, so that before it is reaching 100% of Db2 tablespace architecture limit, this can be fixed.
Now we are monitoring through a S...
The reorg online process need to lock the table in order to conclude. This is not a problem when you dont have many transactions, but when you have a 24x7 intense workload you might have a huge impact on your application.
Recommend/evaluate indexes – more information for each index
This is a point for tuning with indexes -> Tuning with indexes is still very common and useful. While using recommend and evaluate indexes it is possible to investigate each recommended index by updating USE_INDEX column in the table ADVISE_IND...
Pain point: Index rebuild stops if user terminates the connection accessing the table with an index that is marked inconsistent and it starts over from the beginning again on next table access by another user. Scenario:An index object is marked in...
"delete cascade" does not work with "not enforced"
The option "not enforced" on a foreign key invalidates an already set "on delete cascade" option, although this is not visible anywhere within the data model or documentation. In my opinion, setting one of these options should prohibit the other o...
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