OracleNotes

“Oracle *daily* TidBits” (#oratidbit) published on Facebook &Twitter, during weekdays in November 2019. I hope you find these helpful to learn something new or to remind you of its existence and use.

#OraTidbit Init parameter ADG_ACCOUNT_INFO_TRACKING controls login attempts of users on Oracle Active Data Guard standby databases. Value GLOBAL maintains a single global copy of users’ account information across all databases (primary and standby). Login failures across all databases count towards the maximum count and logins anywhere will be denied when the count is reached.

#OraTidbit Oracle Database Personal Edition includes all of the Enterprise Edition components except Oracle RAC. Oracle PE is available on Linux and Windows platforms only and Oracle management packs cannot be used.

#OraTidbit #DB19c If you are not licensed for Oracle Multitenant, you may have up to 3 user-created PDBs in a container database. If you are licensed for Oracle Multitenant, you can create up to 252 PDBs on non-Exadata Enterprise Edition platforms, and 4096 PDBs on Exadata.

#OraTidbit Many #OrclDB performance features are available only on Exadata – Automatic Indexing, SQL Quarantine, Real-time statistics, High-frequency automatic optimizer statistics collection, In-Memory Column Store support for External Tables, MemOptimized Row Store, etc.

#OraTidbit Oracle Enterprise Edition security options such as Column-level encryption, Tablespace encryption, and redaction are available with the Advanced Security Option.

#OraTidbit The Oracle TimesTen Application-Tier Database Cache (TimesTen Cache) is a Database option for caching subsets of the database in the application tier. TimesTen Cache is included in Oracle Database Personal Edition.

#OraTidbit #AWS #OracleRDS Amazon RDS supports Oracle Database versions 19c (19.0.0), 18c (18.0.0) & 12c (12.2.0.1 and 12.1.0.2). You can not create DB instances that use Oracle version 11.2.0.2 or lower.

#OraTidbit #AWS #OracleRDS There are two licensing options available on Amazon RDS: License Included and Bring Your Own License (BYOL). The License Included model is supported for Oracle Database Standard Edition One & Two (SE1 & SE2).

#OraTidbit #AWS #OracleRDS Amazon RDS supports Multi-AZ deployments for Oracle as a high-availability, failover solution. If you use the Bring Your Own License model, you must have a license for both the primary DB instance and the standby DB instance in a Multi-AZ deployment.

#OraTidbit #AWS #OracleRDS Several privileges are not available for the DBA role on an Amazon RDS DB instance – Alter database, Alter system, Create any directory, Drop any directory, Grant any privilege, Grant any role.

#OraTidbit #OracleCloud #OrclDB For 1-node virtual machine DB systems, Oracle Cloud Infrastructure provides a “fast provisioning” option to create a DB system using Logical Volume Manager (LVM) as your storage management software instead of Automatic Storage Management (ASM).

#OraTidbit #OracleCloud #OrclDB Oracle Cloud Infrastructure offers 1-node DB systems on either bare metal or virtual machines and 2-node RAC DB systems on virtual machines. Bare metal DB systems have locally attached NVMe storage. VM DB system uses OCI block storage.

#OraTidbit Oracle database automatic block repair feature: the primary database automatically attempts to repair the corrupted block in real-time by fetching a good version of the same block from a physical standby database as soon as the corruption is detected. Requires the Oracle Active Data Guard option.

#OraTidbit #OrclDB Global Data Services is a highly effective solution for automatic workload management across a set of replicated databases. Oracle Data Guard, Oracle GoldenGate, or any other database replication technology, can be used to synchronize the databases. Requires the Oracle Active Data Guard license.

#OraTidbit #OrclDB Heat Map tracks data access and modification. Provides data access tracking at the segment-level and data modification tracking at the segment and row level. Enable with the HEAT_MAP initialization parameter. Requires the Oracle Advanced Compression option or the Oracle Database In-Memory option.

#OraTidbit Implement ILM strategy using the Automatic Data Optimization (ADO) feature – automate the compression and movement of data between different tiers of storage within the database. Requires the Oracle Advanced Compression option or the Oracle Database In-Memory option.

#OraTidbit Enabling block change tracking (BCT) facilitates fast incremental backups. Using BCT for Fast Incremental Backup on Physical Standby requires Oracle Active Data Guard option.

#OraTidbit ORAchk, EXAchk and Trace File Analyzer (TFA) are now combined into a single installer called Autonomous Health Framework (AHF 19.3). There is no change to the command-line tools. Use Oracle Support Doc ID 2550798.1 to download AHF.

#OraTidbit Install the Autonomous Health Framework (AHF) using command “ahf_setup”. TFA will be automatically started after install. ORAchk or EXAchk can be can be started to run automatic compliance check “orachk|exachk -autostart”.

#OraTidbit ORAchk/EXAchk -autostart will perform compliance checks for the most severe problems at 2am, once a day; and all known problems once a week at 3am on a Sunday.

#OraTidbit Certain ORAchk and EXAchk checks have the capability to automatically fix problems when found. Use “orachk -showrepair {check_id}” to see what the repair command actually does.

#OraTidbit ORAchk and EXAchk are integrated with Database AutoUpgrade & Cluster Verification Utility (CVU). They run ORAchk & EXAchk in -preupgrade mode.

“Oracle *daily* TidBits” (#oratidbit) published on Facebook &Twitter, during weekdays in October 2019. I hope you find these helpful to learn something new or to remind you of its existence and use.

#OraTidbit #DB19c For Enterprise and Standard editions of Oracle database, if you are not licensed for Oracle Multitenant, then you may have up to 3 PDBs in a given container database at any time.

#OraTidbit #OracleLinux Oracle Linux 8 ships with version 8.0 of the #MySQL database.

#OraTidbit #OracleLinux In Oracle Linux 8, the default iptables network packet filtering framework been replaced with the nftables framework. iptables-translate, ip6tables-translate commands to convert existing iptables and ip6tables rules to their nftables equivalents.

#OraTidbit #OracleCloud #AutonomousDB #AlwaysFree Autonomous Database will stop the database if there is no activity for 7 consecutive days. Always Free Autonomous Database will be terminated if the database is stopped for 3 consecutive months.

#OraTidbit #OracleCloud #Exadata Cloud Service configuration is equipped with a fixed amount of memory, storage, and network resources. You can choose how many compute node CPU cores are enabled, to meet workload demands and only pay for the compute node resources that you need.

#OraTidbit #OracleCloud When an #AutonomousDB preview version is available you can provision an Autonomous Database to try new features and to test your applications before the general availability of these features. The current preview version is Oracle Database 19c.

#OraTidbit #DB19c In Oracle Database 19c, you can create a duplicate of an Oracle Database by using the createDuplicateDB command of Database Configuration Assistant (DBCA) in silent mode.

#OraTidbit #DB19c GROUP_PARTITION_TABLE_DATA, a new value for the Import DATA_OPTIONS command line parameter, changes Oracle Data Pump default behavior by importing table data in all partitions of a table as one operation.

#OraTidbit Oracle Trace File Analyzer in #DB19c includes REpresentational State Transfer (REST) support. The REST interface enables you to configure remote management, and automate data center operations.

#OraTidbit #OrclAPEX Social Sign-In authentication scheme supports authentication with Google, Facebook, and other social networks that support OpenIDConnect / OAuth2 standards.

#OraTidbit #OracleCloud #AutonomousDB ATP/ADW allows you to modify initialization parameters OPTIMIZER_CAPTURE_SQL_PLAN_BASELINES, STATISTICS_LEVEL, and TIME_ZONE (only) at the session-level.

#OraTidbit #OracleCloud #AutonomousDB Caution: A restore operation on ATP/ADW restores the user-defined directories to the timestamp you specified for the restore; files that were created after that timestamp would be lost.

#OraTidbit #OracleCloud #AutonomousDB Oracle Flashback Features Supported with Autonomous Database are Flashback Drop, Query, Table, Transaction Query, and Version Query. Flashback Data Archive and Flashback Transaction are not supported.

#OraTidbit #OracleCloud #AutonomousDB Though CREATE DATABASE LINK statement is not available, you can use DBMS_CLOUD_ADMIN.CREATE_DATABASE_LINK to create database links in Autonomous Database (ATP/ADW).

#OraTidbit #OracleCloud #AutonomousDB You can create and validate external partitioned tables with the DBMS_CLOUD.CREATE_EXTERNAL_PART_TABLE and DBMS_CLOUD.VALIDATE_EXTERNAL_TABLE statements. Query multiple data files in the Object Store as a single external table and the files can be represented as multiple logical partitions.

#OraTidbit #OracleCloud #AutonomousDB Enabling autoscaling allows an Autonomous Database to use up to three times more CPU and IO resources than the currently specified CPU Core Count (up to a maximum of 128 CPU cores). If your workload requires additional CPU and IO resources the database automatically uses the resources without any manual intervention required.

#OraTidbit #DB19c In Oracle Database 19c, you can use an external Simple Mail Transfer Protocol (SMTP) server to receive Oracle Trace File Analyzer notifications. In earlier releases, the monitored hosts have to be configured with local Sendmail or SMTP support.

#OraTidbit #OrclDB Oracle Advanced Queuing stores user messages in abstract storage units called queues. When Web-based business applications communicate with each other, producer applications enqueue messages and consumer applications dequeue messages.

#OraTidbit #oVirt is an open-source distributed virtualization solution, designed to manage enterprise infrastructure. oVirt uses the KVM hypervisor. Oracle Linux Virtualization Manager (#OLVM) is based on the oVirt opensource project.

#OraTidbit #Linux In Oracle Linux 8, both the GNOME session and GNOME Display Manager (GDM) use Wayland as the default display server. Wayland is a simpler replacement to the X.org server.

#OraTidbit Starting with Oracle Database Release 19c, invalidated PL/SQL objects run on Active Data Guard standby database can be automatically recompiled by setting the ADG_REDIRECT_DML initialization parameter to TRUE. The DDL corresponding to these PL/SQL objects is redirected to and executed on the primary database. The standby session waits until the operation is completed.