AWR: Multitenant-Specific Initialization Parameters
By default, the database engine automatically takes snapshots in the root container only. Such snapshots cover the root container as well as all open PDBs belonging to it. From version 12.2 onward, you can control whether the database engine automatically takes also PDB-level snapshots through…
AWR Flush Levels
From version 12.1.0.2 onward, for taking AWR snapshots, you have the choice between four AWR flush levels: BESTFIT, LITE, TYPICAL and ALL. If you check the Oracle Database documentation, you won’t find much information about the difference between them. The best you will find, in…
Oracle Enterprise User Security with multiple ldap.ora
Recently I came across the situation where I have to configure Enterpriser User Security for a database server with multiple databases for different directories. This is quite tricky when using a shared Oracle Home and a central TNS_ADMIN directory for SQLNet configuration. A common TNS_ADMIN…
Oracle Enterprise User Security with multiple ldap.ora
Recently I came across the situation where I have to configure Enterpriser User Security for a database server with multiple databases for different directories. This is quite tricky when using a shared Oracle Home and a central TNS_ADMIN directory for SQLNet configuration. A common TNS_ADMIN…
Audit Trail cleanup in Oracle Multitenant environments
A crucial aspect of any database audit concept is the management and maintenance of audit trails. Depending on the defined audit policies and the database activity, an audit trail can grow relatively quickly. Oracle Multitenant environments increase the operational effort because the root container and…
Audit Trail cleanup in Oracle Multitenant environments
A crucial aspect of any database audit concept is the management and maintenance of audit trails. Depending on the defined audit policies and the database activity, an audit trail can grow relatively quickly. Oracle Multitenant environments increase the operational effort because the root container and…
Oracle CPU / PSU Advisory July 2019
Recently, just in the middle of the summer holidays, Oracle has released the third Critical Patch Advisory for its products. It seems there’s a lot of work going on in Redwood Shore. Oracle has fixed about 319 security vulnerabilities across their products. The Oracle database…
Oracle CPU / PSU Advisory July 2019
Recently, just in the middle of the summer holidays, Oracle has released the third Critical Patch Advisory for its products. It seems there’s a lot of work going on in Redwood Shore. Oracle has fixed about 319 security vulnerabilities across their products. The Oracle database…
MIN/MAX Optimization and Asynchronous Global Index Maintenance
In this short post I would like to point out a non-obvious issue that one of my customers recently hit. On the one hand, it’s a typical case where the query optimizer generates a different (suboptimal) execution plan even though nothing relevant (of course, at…
PDB_OS_CREDENTIAL with external table pre-processor
As part of a customer project I am currently enhancing PDB security and isolation. Since OS interaction is necessary, I can not just use lockdown profile to block OS access. The idea is to isolate the PDB with lockdown profiles and allow dedicated OS access….
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