JDBC Thin Connections to Autonomous Transaction Processing DB
There are two methods for connecting to ATP using a JDBC thin client. One is using Oracle wallet and the other is using java keystore. This post gives a summary of setting up JDBC thin connections...
View ArticleUCP Error Even When Not Using Multi-Tenant Shared Pool Feature
Following errors were seen on CDB alert log where JDBC connections were made to a service associated with a PDB.2020-10-15T12:18:50.823318+00:00TESTPDB(3):WARNING: too many parse errors, count=100 SQL...
View ArticleRecovery Catalog
Recovery catalog allows to store database metadata in a dedicated database schema. It can have longer renteion for backup records than storing them in control file. If data guard is used a recovery...
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Recovery Catalog and Data Guard
Previous post listed steps for setting up a recovery catalog. This post looks at steps specific to using recovery catalog in a data guard environment.Data guard doesn't chagne the way how a recovery...
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High Disk file operations I/O Waits When Querying Unified Audit Trail
DB monitoring showed high waits for Disk file operations I/O event. The select query originated from the EM console. The database is running pure unified auditing (not mix mode) as such the...
View ArticleUpgarding Recovery Catalog
The version of the recovery catalog schema must be greater than or equal to the version of the RMAN client connecting to it. More on the rman compatability could be found on the backup and recovery...
View ArticleHigh Sync ASM rebalance Waits When DB is Promoted to 13c EM
High number of Sync ASM rebalance waits were observed on the database after it was promoted to the EM 13.4The below SQLS were identified as the two SQLs causing most of the waits.6zcsw17mp4k2y #myDIV {...
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Far Sync Instance Stats Not Shown on Data Guard Performance Page on Cloud...
Enterprise Manager Cloud control has a separate performance page for viewing data gaurd performance. This gives one page view of redo genration, apply rate and transport lags times. However, in a...
View ArticlePlugging non-CDB as a PDB - Manual vs Autoupgrade
This post shows the the comparison between the manual method and using autoupgrade for plugging in a non-CDB as a PDB to CDB in the same host.Manual Method1. The non-CDB details are as followsSQL>...
View ArticlePlugging in non-CDB to CDB and reusing the non-CDB Datafiles in Standby
This post shows how the use of STANDBY_PDB_SOURCE_FILE_DIRECTORY parameter could help in reusing data file in the standby when a non-CDB is plugged in as a PDB to CDB that is also in a data guard...
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Import and Export Data Using Data Pump on Autonomous Transaction Processing DB
This post shows the steps for importing and exporting data using data dump on autonomous transaction processing (ATP) DB. The ATP used in this case is on shared exadata infrastructure and 19c (19.5)....
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Creating Manual Backups on Autonomous Transaction Processing DB
Autonomous Transaction Processing (ATP) DB is not configured for manual backup right after provisioning. The manual backups are written to an object storage bucket. Cretain configuration tasks must be...
View ArticleRemoving a Standby Database From a Data Guard Configuration With RedoRoutes
There is an earlier post which shows how to remove a standby database from a data guard configuration when redo routes are not used. This post shows steps for removing standby databases when redo...
View ArticleCreating a Standby From Backup of Another Standby
A previous post showed the steps for adding a physical standby to an existing data guard configuration. In it the creation of the standby was done using active database duplication. This post shows the...
View ArticleLOG_FILE_NAME_CONVERT is not defined, stop clearing ORLs
LOG_FILE_NAME_CONVERT name parameter is used to correct the file location for log files if the database is being created from another database and source database had a different directory structure....
View ArticlePlugging in a PDB in Data Guard Configuration
An earlier post shows how to use the STANDBY_PDB_SOURCE_FILE_DIRECTORY parameter to reuse the data files of a standby non-CDB when primary non-CDB is plugged in as a PDB. This post shows how the same...
View ArticleEnable/Disable ASM Rebalance Compat Phase
The rebalnce operation in ASM consist of three phases one of which is compact. As per 1902001.1 the compact phase move data closer to outer tracks of the disk. This could be observed during adding or...
View ArticleTracing ASYNC Redo Transport When Data Guard Has Far Sync Instance
One way to find out cause for transport lags in data guard is to trace the redo transport related events. For async transport refer the white paper here. However, the trace event 16421 with level 1 did...
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Far Sync Instance Not Detected For Template Apply
A data guard configuration (same configuration mentioned in a previous post) is promoted to EM 13.4 and has serveral far sync instances. The instance type is identified as far sync in the instance page...
View ArticleORA-12754 When Setting ADG_ACCOUNT_INFO_TRACKING to Global
ADG_ACCOUNT_INFO_TRACKING was first introduced in 18.1 enchance the security posture in a data guard configuration. Setting this parameter to global result in login failures accross the data guard...
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