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Matrix - Cloudera lastest version integration (CDH5.0)
SDMCC has ordered 70 PowerLinux box plus Symphony, GPFS to run big data analytics application, the application was developped at CDH5.0 (MRv2). Symphony MR to integrate with CDH can bring better performance, reliablity to SDMCC.
Would like OPT_SEEK_FACTOR as a session set environment option
In 11.70, a new "seek cost" component for index costing was introduced, the purpose of which was to more accurately reflect the cost for seeking in an index scan (when index is not clustered) for large indexes. OPT_SEEK_FACTOR is an undocumented O...
Currently a CTE is always being resolved by going back to disk. For example, if the same CTE is reused with in the same query, for each time it is used, it is reading from the disk and processing the entire query. So if it is used 5 times with in ...
SQL skelecton for SQLTrace Most of the customers' product system have to run almost 1000 transactions per seconds, it means there are about 86M transactions per day. so there will be to many SQLs would be traced by current SQL trace.so customer ca...
Temporary table only cached in the memory, it does not to write into the temp dbspace.Requirement from China mobile (CMCC), CMCC use lots of temp table in the following 2 ways:Create temp table ... with no log; select * from tab into temp tabname ...
When we try to ADD a table on the accelerator we have this message : Stored procedure call "ACCEL_ADD_TABLES"Parameters: Accelerator name: PSAIDAAConnection profile: LOCBBA AQT10050I - An internal error occurred on the 'PSAIDAA' accelerator: An as...
Enhancements To DB2 or IDAA or Cognos to allow Cognos queries to accessing DB2 to be offloaded to IDAA
We are currently in the process of deploying Cognos on z/OS and are using DB2 z/OS as the metadata repository and, for some applications, the targert DBMS for reporting. Some of the SQL being sent to DB2 is fairly CPU intensive and would be a good...
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