New OakTable World 2012 video is published

Just published Kevin Closson video from OakTable World 2012.

Enjoy,

Marcin

Oracle on AIX – where’s my cpu time ?

This story begins couple of weeks ago when I was asked to look on performance problem for critical processes before go-live. There were differences between run times between different test systems and between runs with 10046 trace enabled or not.

First of all I started with tracing issue. I have checked server CPU and disk utilization using NMON (tool name is important here). There wasn’t any problem with CPU utilization – or at least this is what I was thinking at that time. Tracing was enabled with level 12 (bind and wait) and it generate 2 GB of trace file (more...)

OakTable World 2012 – Greg Rahn video

New video from OakTable World 2012 is available - Greg Rahn - Beyond Relational Databases

 

regards
Marcin

New OakTable Video – Delphix presenation

New OakTable World 2012 video from Kyle Hailey presentation has been uploaded into YouTube.


regards,
Marcin

How dNFS database clone works – part 1

There is new feature in Oracle 11.2.0.2 called dNFS clone. It has been described by Kevin Closson on his blog post - Oracle Database 11g Direct NFS Clonedb Feature  and very good configuration description has been posted by Tim Hall on his blog - Direct NFS (DNFS) Clonedb in Oracle Database 11g Release 2 (Patchset 11.2.0.2). I have played with it just after I found both blogs but never think how Oracle implemented that feature. I came back to it when my colleague asked me if I ever use that in production environment (more...)