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new aggregated WLM threshold for LOCKLIST at workload/service class level
We have MAXLOCK db-cfg parameter which can be used to avoid a single connection (UOW) to consume the LOCKLIST space. But this parameter some times it not enough. I have seen LOCK escalation cases happening (which locked system tables, causing hug...
We need an activity threshold to trigger an action whenever a specific activity consumes more than a given amount of transaction log space.I know that there is already some control mechanism by using DB CFG parameters MAX_LOG and NUM_LOG_SPAN , bu...
Mechanism to identify a workload and adjust memory values
Workloads can be different in a database, executed at different times.When the STMM is active, and a workload (let's say A) runs for several hours, then the memory will be fine adjuted for the workload at the end of the execution.However, for the ...
Lowering the limit for ACTIVITYTOTALTIME and UOWTOTALTIME
We should be able to trap the transaction that spent more than 10 seconds with a threshold. Can we change the low limit of the parameter ACTIVITYTOTALTIME and UOWTOTALTIME to allow a magnitude of milli second.
Enhance Db2 WLM to enable it to prioritize access to physical I/O
We have a Db2 AESE 11.1 fp4a mixed use (but no column tables) data warehouse on an AIX 7.2 LPAR that is limited to 75K IOPS by NetApp. When the threshold is met, high priority OLTP queries submitted by our 1000 retail store POS systems can hang in...
WLM monitor and control total private sortheap usage
Concurrent private sortheap heavy queries run out of system memory and cause systems reboot. ISAS 7700 environment with DB2 v10.1 FP4 on AIX. There are 16 physical nodes running 122 database partitions. The catalog node and coordinator are on one ...
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