Michael_D. 1100004WAH Visits (3739)
PTF UK91435 (APAR PM79520)
is required for DB2 10 for z/OS customers in a Data Sharing environment
PTF UK91435 is required for DB2 10 for z/OS customers
Michael_D. 1100004WAH Visits (3275)
agburke 060001QPDN Visits (2925)
CPU increase is always a customer concern, expecially when it occurs across a release boundary. Many of our customers in DB2 10 have seen a CPU reduction in the DB2 address spaces, and much of this can be attributed to the zIIP eligibility of asynchronous reads/ writes. However there have been some circumstances where the new monitoring or storage allocation behavior has affected CPU negatively.
Here are some APARs to address CPU degredation at the address space level.
PM56363 (HIPER): DIST TCB time increase due to remote SIGNON requ
agburke 060001QPDN Visits (2267)
There is a new APAR, which is still open, which deals with release incompatible changes in V10.
PM66095: help with handling release incompatible change for VARCHAR(DECIMAL), CAST(DECIMAL AS CHAR), CAST(DECIMAL AS VARC
1 - remove leading zero
2 - no trailing decimal point
V10 result is '1'
V9 result is '1.'
IFCID 366 can be used to check for the occurrence of this SQL in your subsystem.
Here is a chart that will be updated in the Information Center, and later the installation guide.
Michael_D. 1100004WAH Visits (2923)
Higher CF CPU utilization in a DB2 10 for z/OS data sharing environment during Delete_Name processing. Delete_Name requests/sec can be significantly higher in DB2 10 for z/OS than in DB2 9 for z/OS. In V10, when the pageset/partition becomes non GBP dependent, the Delete_Name process deletes only data entries to avoid cross invalidation processing at that time, and to allow cleanup of the directory
entries later when other pages are registered. The V9 Delete_Name process deleted both data and directory entries. In DB2 10 for z/OS, the Delete_Name requests/sec can be significantly higher because CFCC processing is not as efficient when only data entries are deleted.
PM51467: CF DELETE_NAME PERFORMANCE IN DB2 10 FOR Z/OS http