Oracle Autonomous Database...Sep 27, 2019 · •Oracle Exadata X7-2 as the deployment platform...
Transcript of Oracle Autonomous Database...Sep 27, 2019 · •Oracle Exadata X7-2 as the deployment platform...
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Oracle Autonomous DatabaseWhat’s the DBA’s Role?
Biju Thomas
@biju_thomas
27-Sep-2019
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Biju Thomas
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❖ Principal Solutions Architect @ OneNeck IT Solutions❖ Over 20 years of Oracle Database development and administration expertise❖ Over 10 years of Oracle E-Business Suite Architecture & Tuning expertise❖ First book published in September 2000, seventh in 2015❖ DBA blog since 1997 – www.bijoos.com❖ Daily Oracle Tidbits #oratidbit❖ Oracle ACE Director
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Oracle Cloud - Prelude
• Late entrant to the Cloud market
• Transition from product company to services company. Consumption-based, service-driven with a retail model discipline.
• Subscription/consumption model for the cloud should be applicable for databases to be relevant in the new world.
• Oracle internally transitioning to its own cloud to improve operational capabilities.
• Oracle develops and maintains its own Oracle Cloud infrastructure.
• Existing public clouds are not capable of supporting the kinds of enterprise applications, databases and workloads that Oracle customers run.
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What is Autonomous Database?
• Comprised of Oracle Database 18c Enterprise Edition (with all database options and management packs included from a software packaging perspective)
• Oracle Exadata X7-2 as the deployment platform• Real Application Clusters, Oracle Active Data Guard, In-Memory
• Dedicated PDB. The memory, flash cache, and other resources on an Oracle Exadata system are not dedicated.
• Oracle Cloud Automated Database Operations components (scripts, best practices, procedures, etc.)
• Patched per Oracle’s schedule• No downtime, no announcement.
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“There is nothing to learn, there is nothing to do”
Autonomous Database CLOUD SERVICE
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Columnar Format Row Format
Data Summaries Automated Indexes
Optimizes Complex SQL Optimizes Response Time
Plan Stability
Runaway Query Prevention
Plan Stability
Runaway Query Prevention
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ATP – Dedicated Autonomous Database• An Autonomous Exadata
Infrastructure• Hardware rack which includes
compute nodes and storage servers tied together by a high speed, low latency InfiniBand network and intelligent Exadata software.
• An Autonomous Container Database• Container Database for multiple user
databases
• An Autonomous Transaction Processing Database • User Database configured for a
transactional workload
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• CREATE/ALTER TABLESPACE command not available.
• RMAN not available.
• Oracle Database Result Cache is enabled by default for all SQL statements.
• Do not have direct access to the database node or to the local file system.
• ADW Specific:• Compression is enabled by default for ADW. Uses Hybrid Columnar Compression for
all tables by default.
• Parallelism is enabled by default. Degree of parallelism for SQL statements is set based on the number of OCPUs in the system and the database service the user is connecting to.
• Parallel DML is enabled by default.
ATP / ADW
Autonomous Database Properties
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Create Autonomous Database
The Easy Part!
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Connecting to Autonomous Database
SQL Developer, SQL*Plus, SQLcl, ODBC, JDBC
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Extract tnsnames.ora and sqlnet.ora files
Adjust sqlnet.ora with correct Wallet path
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Creating Schemas and Users
No privileges to create a tablespace, profile or database link **.
• All users default tablespace is DATA.
• All objects will get created on DATA – physical properties ignored.
• DB links to ADW/ATP allowed.
• “Admin” can create database link using API
18c Database: Schema accounts available.
• Create user <x> NO AUTHENTICATION.
“Admin” needs to create the user.
• Provide Wallet to user to connect to database.
• Assign appropriate role.
Account locked for 24 hours after ten (10) failed login attempts.
• “Admin” can unlock the account.
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Using Data Pump for Export & Import
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Data Pump on ADW/ATP• User must have DWROLE or DATAPUMP_CLOUD_IMP or DATAPUMP_CLOUD_EXP.
• Supported Clouds• OCI Object Storage & Object Storage Classic• Azure Blob Storage, Amazon S3
• Steps:• Generate token to authenticate to cloud• Create Credential (DBMS_CLOUD.CREATE_CREDENTIAL)• Use impdp or expdp from your (client) machine, file location is a URL.
• dumpfile=https://swiftobjectstorage.us-phoenix-1.oraclecloud.com/v1/adwc/adwc_user/export%u.dmp
• dumpfile=https://s3-us-east-1.amazonaws.com/my-aws-bucket/ebsfull%.dmp
• Use additional recommended parameters to conform to ADW/ATP• transform=segment_attributes:n
• transform=dwcs_cvt_iots:y
• transform=constraint_use_default_index:y
• exclude=index, cluster, indextype, materialized_view, materialized_view_log, materialized_zonemap, db_link
• Move log file to Cloud Storage (DBMS_CLOUD.PUT_OBJECT)
Documentation
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What is DBMS_CLOUD Package for?
• To interact with Cloud storage (OCI, AWS, Azure)
• To manage credentials• Create, drop, enable, disable, update
• To create and validate external table
• To load (copy) data to a table from external file
• To copy files (data) from database server to cloud storage and vice versa
• To list the objects (files) on a cloud bucket
• To list and delete files on the database server
• To create additional directories (DATA_PUMP_DIR is default)
https://antognini.ch/2018/07/dbms_cloud-package-a-reference-guide
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Local MachineOn-Prem
Cloud StorageAWS / Azure / Oracle Cloud
Exadata running ADW/ATPDATA_PUMP_DIR
DELETE_OBJECT LIST_OBJECTS
PUT_OBJECT
COPY_DATA → CREATE_EXTERNAL_TABLE →
DELETE_FILEGET_OBJECT →
LIST_FILES
SQL DeveloperSQLclExpdpImpdp
DBMS_CLOUD
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What is DBMS_CLOUD_ADMIN Package for?• Enable or disable application continuity.
• Create or drop database links.
• Grant tablespace quota to a user.
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DESCRIBE DBMS_CLOUD:PROCEDURE COPY_DATAPROCEDURE CREATE_CREDENTIALPROCEDURE CREATE_DIRECTORYPROCEDURE CREATE_EXTERNAL_TABLEPROCEDURE DELETE_ALL_OPERATIONSPROCEDURE DELETE_FILEPROCEDURE DELETE_OBJECTPROCEDURE DELETE_OPERATIONPROCEDURE DISABLE_CREDENTIALPROCEDURE DROP_CREDENTIALPROCEDURE DROP_DIRECTORYPROCEDURE ENABLE_CREDENTIALFUNCTION GET_METADATA RETURNS CLOBFUNCTION GET_OBJECT RETURNS BLOBPROCEDURE GET_OBJECT
DESCRIBE DBMS_CLOUD:FUNCTION LIST_FILES RETURNS TABLEFUNCTION LIST_OBJECTS RETURNS TABLEPROCEDURE PUT_OBJECTPROCEDURE RESIGNAL_USER_ERRORPROCEDURE UPDATE_CREDENTIALPROCEDURE VALIDATE_EXTERNAL_TABLE
DESCRIBE DBMS_CLOUD_ADMIN:PROCEDURE CONFIGURE_DATABASE_VAULTPROCEDURE CREATE_DATABASE_LINKPROCEDURE DISABLE_APP_CONTPROCEDURE DROP_DATABASE_LINKPROCEDURE ENABLE_APP_CONTPROCEDURE GRANT_TABLESPACE_QUOTA
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Available Tuning Tools
Service Console
• CPU Utilization, Response, time, Running SQL
• Real time and historic database activity
• Monitored SQL / Download Report
SQL Developer
• Instance Viewer
• Realtime SQL Monitor
Optimizer
• Gather table/schema statistics
• Enable hints at a session level
Oracle Management Cloud
• Get alerted on issues
Performance Hub
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Cloud Dashboard: Metrics
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• No Tuning Pack.
• Partition tables in ADW
• Scale up number of CPUs / Autoscaling
• Use a different service
Database Tuning Possibilities
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ADW ATP• HIGH
• Highest resources, lowest concurrency
• Queries run in parallel
• MEDIUM• Less resources, higher concurrency• Queries run in parallel
• LOW• Least resources, highest
concurrency• Queries run serially
• TPURGENT• The highest priority application connection service for time
critical operations.
• TP• typical application connection service for transaction processing
operations.• No parallelism.
• HIGH• Highest priority when the system is under resource pressure.• Queries run serially unless you specify a parallel degree through
a session parameter, using a statement hint, or by specifying a parallel degree on the underlying tables.
• MEDIUM• Medium priority when the system is under resource pressure.• Queries run serially unless you specify a parallel degree through
a session parameter, using a statement hint, or by specifying a parallel degree on the underlying tables. Degree of parallelism is limited to four (4).
• LOW• Lowest priority when the system is under resource pressure.• Queries run serially.
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• cs_resource_manager.update_plan_directive(consumer_group => 'HIGH', io_megabytes_limit => 1000, elapsed_time_limit => 120);
• cs_resource_manager.update_plan_directive(consumer_group => 'HIGH', io_megabytes_limit => null, elapsed_time_limit => null);
• A session may be terminated if it stays idle for more than five (5) minutes
Manage Runaway SQL
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• ADW• Gathers optimizer statistics automatically for tables loaded with direct-path load
operations.• If you have tables modified using conventional DML operations you can run commands to
gather optimizer statistics for those tables.• Ignores optimizer hints and PARALLEL hints in SQL statements by default. To change at
session level:• ALTER SESSION SET OPTIMIZER_IGNORE_HINTS=FALSE;
• ALTER SESSION SET OPTIMIZER_IGNORE_PARALLEL_HINTS=FALSE;
• ATP• Gathers optimizer statistics automatically so that you do not need to perform this task
manually. Automatic statistics gathering runs in a standard maintenance window.• Honors optimizer hints and PARALLEL hints in SQL statements by default. To change at
session level:• ALTER SESSION SET OPTIMIZER_IGNORE_HINTS=TRUE;
• ALTER SESSION SET OPTIMIZER_IGNORE_PARALLEL_HINTS=TRUE;
Statistics Gathering & Hints
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Using AWR / ADDM / OEM
• Generate an AWR report on the Performance Hub of OMC.
• AWR at a PDB Level using DBMS_WORKLOAD_REPOSITORY.AWR_REPORT_HTML,
DBMS_WORKLOAD_REPOSITORY.AWR_REPORT_TEXT
• Query V$ACTIVE_SESSION_HISTORY, DBA_HIST_ACTIVE_SESS_HISTORY
• SQL Developer DBA Menu
• No OEM Access (use OMC instead)
• No access to Alert log
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(Adhoc) BackupRecovery
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Miscellaneous Admin Activities
• Clone ADW or ATP• Full database or database metadata
• Setup network Access Control List (ACL) to restrict access to a specific ADW/ATP database. • The database only accepts connections from addresses
specified on the ACL and rejects all other client connections.
• Set up a Service Gateway to allow connectivity to ADW/ATP from private IP addresses in private subnets without requiring an Internet Gateway in your VCN.
• Enable or disable application continuity.
• Analyze audit events with standard log analysis tools or using the Audit service Console, the Audit APIs, or the Java SDK.
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• https://blogs.oracle.com/datawarehousing/managing-autonomous-data-warehouse-using-oci-curl
• Provision, start, stop, scale, backup, restore, …
• Reference: OCI API Documentation• https://docs.cloud.oracle.com/iaas/api/#/en/database/20160918/Autonomo
usDatabase/
Managing Autonomous Database Using oci-curl
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Can I use ADW only a few days a month?
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Use Goldengate with ADW / ATP?
https://docs.oracle.com/goldengate/c1230/gg-winux/GGODB/replicating-data-oracle-autonomous-data-warehouse-cloud.htm
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What is Oracle Data Visualization Desktop?
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https://docs.oracle.com/en/cloud/paas/atp-cloud/atpug/experienced-database-users.html
RESTRICTIONS…. Many!
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PDB Lockdown Profiles
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Summary
• D(b)A’s Role
• No DB Administration / Configuration
• Not much Tuning options
• Recovery (if ever)
• User Management
• Integration
• Data copy / replication / loading
• Connectivity
• Cloud Network / Security
• Create external tables, database links
• Application & SQL Tuning
• Open SR if issues found
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https://go.oracle.com/LP=78880
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Oracle ACE Program
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