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Db2 for z/OS

Showing 809

IFCID 316 401 ZiiP Usage Statistics

Currently the IFCIDs 316 and 401 contains great data for monitoring and tuning SQLs. It would be excellent if these IFCIDs could be extended to include a separate set of ZiiP counters. IFCID 25 does this for Utilities at the moment.
about 4 years ago in Db2 for z/OS 1 Not under consideration

Invalid maximum timestamp value availble in DB2

Currently there is documented maximum timestamp value available in DB2 as '9999-12-31-'. However, using this value can lead to various problems which are recognized by DB2 development already as during introduction of temporal table...
almost 3 years ago in Db2 for z/OS 1 Future consideration

I would like to force the use of the "DEFER" option on the creation of an index (using Zparm to make it optional).

We have DBAs that at times (accidently) run a "CREATE INDEX" and fail to include the "DEFER" option. This is rather easy to do because the reverse engineering tools fail to create syntax with the "DEFER" option. The creation of indexes can be ve...
almost 3 years ago in Db2 for z/OS 0 Future consideration

DB2 z/OS security; hide install SYSADM and SYSOPR from DSNZPARM; use RACF instead

In DB2 z/OS, no group and/or userids are more powerful than the Install SYSADM and to no small degree the Install SYSOPR.Yet, these userids and/or groups are easily found by anyone having access to a db2 subsystem and knowing the existance of DSNZ...
6 months ago in Db2 for z/OS 0 Future consideration

Dynamic Plan Stability - Option to restabilize an invalidated query missing

We've got several SQL queries stabilized with dynamic plan stability. Reason is to prevent them from getting a bad accesspath. After operations like "ALTER TABLE ... ROTATE PARTITION..." the query is flagged to valid N in SYSIBM.SYSDYNQRY. Than we...
almost 2 years ago in Db2 for z/OS 0 Future consideration

No Implicit Runstats when running Reorg that materializes pending DDL

When a REORG is run to materialize a pending DDL change, the REORG enforces an inline statistics (RUNSTATS) even though no statistics keywork is added to the REORG statement/card. it defaults to TABLE(ALL) INDEX(ALL).This obviously can impact acce...
8 months ago in Db2 for z/OS 0 Future consideration

Ability to externalize Statistics to RTS after Runstats

In seldom cases (~1%) Online Reorgs abend because the TOTALROWS column in the SYSTABLESPACESTATS are wrong.Then we do Runstats and update the RTS.The question is, why the number of rows is not externalized after doing a RUNSTATS.The value after Ru...
10 months ago in Db2 for z/OS 2 Future consideration

Call a Cobol program via DB2 stored procedure (Case TS005323974)

A cobol program can be called as routine from another cobol program or via a cobol stored procedure called by a java programIn this second case, the program use a larger number of getpages, on tablespace buffer pool than in the first The problem i...
2 months ago in Db2 for z/OS 0 Under review

Return SQL error when DBA attempts ALTER DDL with both pending and immediate changes, instead of returning "0" and "losing" a change.

We recently opened an SR TS005591497 with support when we found that an ALTER to a LOB tablespace specifying both PRIQTY and COMPRESS returned SQLCODE 0, but the PRIQTY was "lost".IBM support pointed out the following:
8 months ago in Db2 for z/OS 1 Is a defect

need SQL tuning component

Now, we are using DSM to manage 235 sets of Db2 databases, of which SQL tuning is a more commonly used function for our system administrators and DBAs. We often use the SQL tuning function to optimize the SQL statements running in the production...
almost 2 years ago in Db2 for z/OS 0 Future consideration