Google’s F1 database for AdWords
BigData - who does not think of Google who released white papers on Bigtable, Google File System (today: Colossus) and MapReduce. These papers contained lots of ideas that influenced the development of Apache Hadoop.On what kind of databases is...
OT: Beurer Half Marathon 2011
Beurer Half Marathon (+ Einstein-Marathon and other distances) took place in Ulm on 18-Sep-2011. The weather was nasty: rainy and windy - the only positive mention it was not hot. The event was again perfectly organized with one huge improvement compared to the last...
Real World Performance Day @Frankfurt
Real World Performance Day took place in Frankfurt on 25-AUG-2011. Real World Performance Day means three presenters - three roles - three screens. Tom Kyte acted as developer and showed the material available from his website ( http://asktom.oracle.com ). Andrew...
Oracle Fixed Object Statistics
Fixed objects are in-memory structures and variables inside the Oracle kernel. Fixed table names start with X$ and represent data via performance views like v$session. Performance views are used in applications (fixed tables should not be queried directly). Why to...
Oracle Dictionary Statistics
Statistics on Oracle-defined schemas like sys, ctxsys, dbsnmp, mdsys, etc are called dictionary statistics. Why to gather dictionary statistics Missing or wrong dictionary statistics can lead to performance issues from Oracle 10g onwards. For Oracle version 9i, Oracle...