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Showing posts from September, 2024

Oracle database 19c Compression Types

   We  had multiple  requirement for Compression hence documenting handy notes  that can help myself and others .  To   automate    compression   we have  feature of Oracle Automatic Data Optimisation  which we will discuss later  ==> Compression types :  We can know  type of compression from  below sql  SQL> select name, currently_used from dba_feature_usage_statistics where lower(name) like ‘%compress%’;  BASIC compression, introduced in Oracle 8 already and only recommended for Data Warehouse OLTP compression, introduced in Oracle 11 and recommended for OLTP Databases as well QUERY LOW compression (Exadata only), recommended for Data Warehouse with Load Time as a critical factor QUERY HIGH compression (Exadata only), recommended for Data Warehouse with focus on Space Saving ARCHIVE LOW compression (Exadata only), recommended for Archival Data with Load Time as a critical factor A...

Sqldiag.sql from Cogni

  ==> For RAC :   #!/bin/sh ##################################################################### # # File          : sqldiag.sh # Abstract      : SQL Diagnostics # Syntax        : sqldiag.sh sid sqlid [user] [format] #                 sid - TNS Entry for the database #                 user - DB User (if null, then OS Login will be used  #                        for login into the database  . use xoracle  for /as sysdba #                 format - Valid values for format: TEXT;  #                          Default output format is HTML  # History       : Suresh Srinivasan    12/30/09     ...