IBM Data and AI Ideas Portal for Customers


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Db2

Showing 989

auto-reorg OLR for cleanup of overflows

Auto-reorg should use online window to issue REORG CLEANUP OVERFLOWS (and also trigger a RUNSTATS afterwards).Problem to solve: SQL optimizer thinks overflow accesses are quite expensive and then might to start choosing different access plans that...
almost 6 years ago in Db2 / Utilities (Export Import Load db2look etc) 1 Not under consideration

Section actuals for BLU

Collecting section actuals and compare it with the SQL compiler estimates using the db2caem tool is quite handy to find cardinality mis-estimates in huge plans.
almost 6 years ago in Db2 / BLU Acceleration 0 Not under consideration

Performance penalty in LOAD when using large bufferpool

LOAD RESETDICTIONARYONLY and other LOADs take very long, if table resides in large buffer.The limitation also applies to LOAD on row based tables, but bufferpools on BLU systems tend to be much larger.
almost 6 years ago in Db2 / Utilities (Export Import Load db2look etc) 1 Not under consideration

WLM should support IDLE timeout threshold for activity.

WLM supports connection IDLE timeout threshold with CONNECTIONIDLETIME. Our customer would like to have IDLE timeout threshold for SQL statement activity within a connection with fine granularity. They periodically issue mon_get_activity and mon_g...
almost 4 years ago in Db2 0 Not under consideration

DB2HOST variable needed for PureScale to redirect and define IP to participating subnet's

In Db2 PureScale GDPC the Db2 cluster is distributed on 2 different physical locations and a Quorum Host (tie breaker node) on a 3rd location.The general Db2 install routines use the 'system hostname' (gethostbyname) for the ongoing install proced...
over 5 years ago in Db2 / pureScale 1 Not under consideration

db2start of a running instance should reload/restart configuration without interruption of current sessions

Sometimes dbm configuration changes are not active immediately and require a full instance restart. E.g. adding an SSL port and config updates of the db catalog changes in SYS*_GROUP ... It would be great, if a db2start command is issued while the...
over 3 years ago in Db2 / Serviceability 2 Not under consideration

Do some more checking when Db2 fixpack is installed - like will fixpack be working after instance upgrade

On my test computer Linux x86_64, Db2 v11.5.8.0 is installed and I decided to upgrade to v11.5.9.0. 1. I checked prerequisite and everything was successful. ./db2prereqcheck -i -s -v 11.5.9.0 2. I installed Db2 server and installation was s...
6 months ago in Db2 / Installation & Upgrade 0 Not under consideration

DB2 LUW DBM CFG RQRIOBLK increase upper limit

When using DB2 LUW client to connect to the Z/os database using the IBM Datastage ETL tool the RQRIOBLK DBM parameter is limiting the packet size of data, this will happen with anyone who pulls data in any significant volumes using the DB2 Driver ...
almost 5 years ago in Db2 0 Not under consideration

Make DB2_USE_ALTERNATE_PAGE_CLEANING=ON the default

DB2_USE_ALTERNATE_PAGE_CLEANING is of great benefit for performance and scalability since it was introduced in v8. It's now the default in pureScale and BLU environments, so why can't we make it the default all around?
over 5 years ago in Db2 / Configuration Parameters 0 Not under consideration

What part of Db2 still requires 32-bit support?

While talking with Keri Romanufa at IDUG Philadelphia I was asked to enter this as an RFE to be checked on.During a Db2 LUW installation for pureScale on a 64-bit machine, which will have only(!) 64-bit executables, a lot of 32-bit libraries are r...
almost 6 years ago in Db2 / Installation & Upgrade 1 Not under consideration

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