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DB2 currently committed semantics available in a pureScale environment
[Background]Customer chose DB2 pureScale as their enterprise-level integrated database and is building four members and two CFs as their pureScale environment. The important keys DB2 pureScale chosen by customer are : - flexible application worklo...
Remove per-tablespace size limitation for v11.1 and v11.5 community edition
Currently if we restore a database backup that was taken on a higher edition of Db2 into Developer-C, it fails with SQL1139N, even if it is fully less than 100GB. There are two workarounds for this:
Set a MAX for all table spaces before taking ...
https://www.ibm.com/support/knowledgecenter/en/SSEPGG_10.5.0/com.ibm.db2.luw.admin.perf.doc/doc/c0009677.html In a pureScale environment, space that is freed up by a delete transaction on one member may not be reused by an insert transaction on a ...
pureScale load completion stage is very slow with range partitioned table
pureScale load of partition table is very slow at load completion stage, because db2 will purge local bufferpool for every partition of the table being loaded. ESE improved performance by purging once for all partitions. we wish this improvement i...
increase DB2 sector size used to write to disks from 512 to 4096
We would like DB2 to use a larger sector size when writing to disks. We uncovered a performance issue when working with DSSD from EMC where to achieve the maximum write throughput a 4096 sector size is required, Db2 currently uses 512 sectors. MS ...
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