DB2 - Problem description
Problem IT21441 | Status: Closed |
PROCESSOR SPECIFIC OPTIMIZATIONS ARE NOT USED AS EXPECTED | |
product: | |
DB2 FOR LUW / DB2FORLUW / B10 - DB2 | |
Problem description: | |
Db2 contains processor specific optimizations. They get only enabled, if a suitable processor gets detected. While a line like this in db2diag.log can be found that indicates that DB2 has detected a SSE4 capable CPU: CPU: total:32 online:32 Cores per socket:8 Threading degree per core:2 SIMD:Y CPU Features:SSSE3,SSE4 another line in db2diag.log indicates that the CPU optimizations are effectively not used: BLU: HW SIMD enabled: SCAN(Y), ARITH(Y), COMP(Y), CPU(1) That means only SSE2 optimizations are used. | |
Problem Summary: | |
**************************************************************** * USERS AFFECTED: * * All systems with modern CPUs. * **************************************************************** * PROBLEM DESCRIPTION: * * See Error Description * **************************************************************** * RECOMMENDATION: * * Upgrade Db2. * **************************************************************** | |
Local Fix: | |
available fix packs: | |
Db2 Version 11.1 Mod 3 Fix Pack 3 for Linux, UNIX, and Windows | |
Solution | |
Workaround | |
not known / see Local fix | |
Timestamps | |
Date - problem reported : Date - problem closed : Date - last modified : | 14.07.2017 21.07.2017 21.07.2017 |
Problem solved at the following versions (IBM BugInfos) | |
Problem solved according to the fixlist(s) of the following version(s) |