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BACKUP/RESTORE should support parallelcompression of backupstripes when using native compress option(RIMS)
Headline Cont...(thisiscurrentlysingle-threadpertablespace).Description -currently, Backup will fetch from multiple tablespaces using multiple concurrent prefetcher sub-agents. However when Backup Compression is enabled, data is forced through Bac...
Optimizer should account for bufferpool hit-ratio when estimated page access time.(RIMS)
In PMR 00962,7TD,000, Goldman Sachs had a scenario where optimizer was choosing a more expensive HSJN over a less expensive NLJN. Shu Lin summaries the problem well: 'In terms of CPU cost and number of IOs, we correctly estimate that NLJN is bette...
Allow a DBA connection even if maximum connections has been exceeded.(RIMS)
Note from customer: Jill, We need a feature enhancement, where there is a way for a DBA to always be able to connect to the DB (at least one connection), even if maxappls, maxagents, maxwhatever has been hit. DBAs shouldnt have to force off applic...
New db2diag.log message to indicate when an optimizer plan is missed due to missing temp tablespace(RIMS)
(See Discussion entry for full details) When an optimizer plan is ineligible due to the non-existence of a sufficiently large temporary tablespace (ie. sort is unable to handle the width of workload row size), a db2diag.log message should be writt...
Session level LOCK TIMEOUT should apply to all lock types.(RIMS)
Currently, the session-level lock timeout only applies to SQLP_TABLE, SQLP_RECORD, SQLP_KEYVALUE, and SQLP_MDCBLOCK. Customer would like this to apply to all locks acquired by the application that set the session-level timeout value.[Michael Snowb...
A description of Oracle's 'multi-version read consistency' can be found here: http://www.ss64.com/orasyntax/10locking.html. Even DB2's most liberal CS isolation is more strict then this. [update 04-27-2009]: Support for isolation level 3 queries t...
LOCK ESCALATION: Ability to specify table-level lock-escalation criteria.(RIMS)
Customer wants more granularity on lock-escalation semantics. currently, lock escalation occurs either when an application hit's the MAXLOCKS constraint, or when the database LOCKLIST becomes full. Since lock-escalation is more detrimental on tabl...
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