CPU Issues and Speculative Execution

http://smooth1.co.uk/security/CPU_issues.html

added

  • Debian,Fedora
  • LLVM,ZFS,Lustre
  • Oracle Sparc,RISC-V
  • Oracle,Nexenta,Scality,Pure Storage,Wonderware,Rockwell Automation,Synology,F5,Qubes,Qubes,Fortinet,Netap

Updated Google cloud section to mention Retpoline a compile time fix for Variant 2 (part of  Spectre) with “almost no performance loss.”

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Oracle APPROX_COUNT_DISTINCT Function

Some notes on the Oracle APPROX_COUNT_DISTINCT Function

The APPROX_COUNT_DISTINCT Function – A Test Case

Testing

http://externaltable.blogspot.co.uk/2014/08/scaling-up-cardinality-estimates-in.html

Scaling up Cardinality Estimates in 12.1.0.2

http://afatkulin.blogspot.co.uk/2013/11/hyperloglog-in-oracle.html

HyperLogLog in Oracle

Sketch of the Day: HyperLogLog — Cornerstone of a Big Data Infrastructure

HyperLogLog — Cornerstone of a Big Data Infrastructure

 


ORA-14696: MAX_STRING_SIZE migration is incomplete for pluggable database

http://www.liberidu.com/blog/2013/12/24/ora-14696-max_string_size-migration-is-incomplete-for-pluggable-database/

ORA-14696: MAX_STRING_SIZE migration is incomplete for pluggable database


Oracle Certification Blog

Oracle Certification BLog

Oracle Certification BLog with updates on the certification program.