IT Solutions Technology Blog

Oracle Database 12c Release 1 (12.1.) RAC on Oracle Linux 6

  Oracle Database Release ≥ 19.7 Standard Edition 2 (SE2) – die Standard Edition High Availability (SEHA) Lizenzierung der Standard Edition 2  für maximal zwei Knoten und dabei kann die 10-Tages-Regel angewendet werden d.h. wenn auf dem zweiten Knoten nicht öfter als 10-mal bzw. 10 Tage pro Jahr die Oracle Database Instanz gestartet wird muss nur der erste Knoten mit der Standard Edition 2 (SE2) lizenziert werden

SQL>@$ORACLE_HOME/rdbms/admin/awrrpt.sql

   Oracle Database – use below query to find the sessions using a lot of CPU

col program form a30 heading „Program“
col CPUMins form 99990 heading „CPU in Mins“
select rownum as rank, a.*
from (
SELECT v.sid, program, v.value / (100 * 60) CPUMins
FROM v$statname s , v$sesstat v, v$session sess
WHERE s.name = ‚CPU used by this session‘
and sess.sid = v.sid
and v.statistic#=s.statistic#
and v.value>0
ORDER BY v.value DESC) a
where rownum < 11;

  Planning the Block Size of Redo Log Files – unlike the database block size which can be between 2K and 32K redo log files always default to a block size that is equal to the physical sector size of the disk historically this has typically been 512 bytes (512B) some newer high-capacity disk drives offer 4K byte (4K) sector sizes for both increased ECC capability and improved format efficiency most Oracle Database platforms are able to detect this larger sector size the database then automatically creates redo log files with a 4K block size on those disks

   RMAN has the ability to duplicate or clone a database from a backup or from an active database it is possible to create a duplicate database on a remote server with the same file structure a remote server will a different file structure or the local server with a different file structure

Quest Foglight for Oracle  – you get unrivaled performance information and advanced Oracle monitoring to prevent costly downtime. This monitoring software provides alerting and notifications, real-time and historical diagnostics, as well as reporting, plus unmatched analytics of collected data. Take Oracle monitoring to the next level with Foglight for Oracle