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Db2 for z/OS

Showing 975

IFCID 172/196 (Deadlock/Timeout) – Add STCK for Held Locks

At IFCID 172/196 (Deadlock/Timestamp) please add a STCK for the held lock (blocker) when the lock was granted. In case of a lockout with this STCK the sequence of the locks, and so the sequence of the blocker-SQLs, can be reconstructed ‘post mor...
over 11 years ago in Db2 for z/OS 1 Not under consideration

Improved granularity for WITH clause

GGDB210017 Implement WITH clause syntax as a sub-clause for JOIN specification
almost 12 years ago in Db2 for z/OS 1 Not under consideration

Use Limitkeys as histogram-stats, if appropriate

Recently we had a Performance Problem where I was requested to collect histogram-stats for a column, which matches the partitioning column. Because this was a big table, running this runstats took about 9 hours to complete. If limitkeys could serv...
over 8 years ago in Db2 for z/OS 2 Not under consideration

Partial PBG REORG for added Partitions due to previous PART LEVEL REORGs

When I run a PART LEVEL REORG of a PBG tablespace and the current data doesn't fit into its original partition DB2 adds a new partition at the end and uses it for the "overflow" data. Which is fine, btw.... If i do this for multiple partitions, se...
over 5 years ago in Db2 for z/OS 1 Functionality already exists

Create a new partition if a LOB-tablespace gets a new partition in a UTS PBG

Hi Sometime the base-table is very small whereas the corresponding lob-tablespace can get bigger and bigger. So the base tablespace remains at one partition whereas the log tablespace can run against the limit of 255 datasets
over 6 years ago in Db2 for z/OS 1 Not under consideration

DB2 - ALTER TABLE ROTATE

Auslöser :PMR 28789The deadlock occurs between the ALTER TABLE ROTATE FIRST TO LAST, which invalidates pkg dependent on the table and triggers an auto rebind ( Thealter table process obtained a row lock on SYSTSTAB and waiting for row lock on SYS...
over 6 years ago in Db2 for z/OS 0 Not under consideration

AREO Status via select

Some ddl Changes are in table SYSPENDINGDDL Some ddl Changes are not there: for example alter table add column can only be see via -dis db() sp() adv It would be better to have the same bahavior for all ddl changes with AREO* Status.Maybe it could...
about 3 years ago in Db2 for z/OS 1 Not under consideration

I/O required for RI check against the parent table when inserts done on the child table.

We have noticed that there is a high number of get pages on the parents indexes when doing an INSERT of a child row. Here are the details of our situation: The parent table has a partitioned primary key index with 132 partitions. The...
over 5 years ago in Db2 for z/OS 0 Not under consideration

Set object status to prohibit data access

Before we drop a Db2 table we need to make sure that noone use the object in any way. We solve this now by stopping the tablespace and keeping it stopped for about six months. This means that noone can access the data and noone can run a utility a...
over 1 year ago in Db2 for z/OS 0 Future consideration

Have new authority for REFRESH of MQT that does not require high privilege levels

We historically have an application batch userid that has DBADM authority. We are limiting all access to this ID to the minimally required authority it requires such as load, imagecopy and runstats at the DB level. When we started converting our t...
over 1 year ago in Db2 for z/OS 1 Not under consideration

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