Fixes are available
DB2 Version 9.1 Fix Pack 7 for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 7a for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 8 for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 9 for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 10 for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 11 for Linux, UNIX and Windows
DB2 Version 9.1 Fix Pack 12 for Linux, UNIX and Windows
APAR status
Closed as program error.
Error description
You may observe RUNSTATS with distribution statistics running slow on Sun UltraSPARC III, IIIi, III+, and IV systems. The problem is related to floating point conversion operations done in the algorithm that collects distribution statistics. It is typically observable in tables with a large number of rows, for example 10 million rows. In a DPF (Database Partitioning Feature) environment, RUNSTATS executes on just one database partition, and it is the number of rows on that database partition that is of consideration.
Local fix
Use table sampling to reduce the number of rows processed by RUNSTATS. Reduce the number of columns for which to collect distribution statistics, for example, skipping columns with uniformly distributed data and/or columns that do not appear frequently in equality or range predicates.
Problem summary
You may observe RUNSTATS with distribution statistics running slow on Sun UltraSPARC III, IIIi, III+, and IV systems. The problem is related to floating point conversion operations done in the algorithm that collects distribution statistics. It is typically observable in tables with a large number of rows, for example 10 million rows. In a DPF (Database Partitioning Feature) environment, RUNSTATS executes on just one database partition, and it is the number of rows on that database partition that is of consideration.
Problem conclusion
First fixed in DB2 v9.1, FixPak 7
Temporary fix
Use table sampling to reduce the number of rows processed by RUNSTATS. Reduce the number of columns for which to collect distribution statistics, for example, skipping columns with uniformly distributed data and/or columns that do not appear frequently in equality or range predicates.
Comments
APAR Information
APAR number
IZ31182
Reported component name
DB2 EDE SOLARIS
Reported component ID
5724N7602
Reported release
910
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2008-09-03
Closed date
2009-04-16
Last modified date
2009-04-16
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
IZ31233 IZ31922
Fix information
Fixed component name
DB2 EDE SOLARIS
Fixed component ID
5724N7602
Applicable component levels
R910 PSY
UP
[{"Line of Business":{"code":"LOB10","label":"Data and AI"},"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSEPGG","label":"DB2 for Linux- UNIX and Windows"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"910"}]
Document Information
Modified date:
03 October 2021