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Ability to query catalog tables and administrative views in stand by
There is an option called Read On Standby (ROS) that allows to connect and perform selects on the standby role of a HADR cluster. However, this is focussed to business tables. I propose the capability to perform selects on the standby but just on ...
IBM case: TS008415413 When an OFFLINE REORG is submitted on Primary, the REPLAY on STANDBY (both Principal and Auxiliary) applies the transactional logs till the BUILD phase. When the reorg moves to recreate or updates the INDEXES, the REPLAYS sto...
Support of Google Cloud Platform (GCP) for automated HADR(with TSA)
Customers are able to deploy a pair of virtual machines(VMs) from the Google Cloud Platform(GCP) and configure a Db2 HADR database pair between the two VMs. They can then furthermore configure HADR automation with TSA via the db2haicu utility. The...
db2pd command to report exact operation that causes HADR replay only window
Currently only "Replay only window is active" is reported in db2diag.log, but not the detailed information about the operation that causes the replay only window, such as exact DDL, reorg, runstats, and etc. statements.
aï¼‰HADR replay master contends with replay worker on queue, and lots of latch contention were observed.bï¼‰HADR replay has IO performance issue. Lots of random IOs were observed, and there should be some sort of prefetch IO to improve performance.
TSA Does not Scale, with each database added it consumes 5 - 8% CPU. In our system ZLinux this is the only option we have for auto failover. When we have 10 Databases we are now consuming 50 - 80% CPU just to run TSA and having to pay extra licens...
BACKUP Performance: Incremental and Delta backups should not have to read all tablespace pages.(RIMS)
Backup currently reads ALL pages in the tablespace to examine the pageLSN in order to determine if a page should be included in the image. This is poor for performance, customer want this addressed using a 21th century approach.
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