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This error means that you are trying to perform some operation in the database which requires encryption wallet to be open, but wallet is ...
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Finding space usage of tablespaces and database is what many DBAs want to find. In this article I will explain how to find out space usage ...
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ORA-01653: unable to extend table <SCHEMA_NAME>.<SEGMENT_NAME> by 8192 in tablespace <TABLESPACE_NAME> This error is q...
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You may also want to see this article about the ORA-12899 which is returned if a value larger than column’s width is inserted in the col...
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This document explains how to start and stop an Oracle cluster. To start and stop Grid Infrastructure services for a standalone installatio...
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If database server CPU usage is showing 100%, or high 90%, DBA needs to find out which session is hogging the CPU(s) and take appropriate ...
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If you want to know how we upgrade an 11g database to 12c using DBUA, click here . For upgrading 12.1.0.1 to 12.1.0.2 using DBUA, ...
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By default AWR snapshot interval is set to 60 minutes and retention of snapshots is set to 8 days. For better and precise investigation of...
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SWAP space recommendation from Oracle corp. for Oracle 11g Release 2 If RAM is between 1 GB and 2 GB, SAWP should be 1.5 times the s...
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This article explains how to install a 2 nodes Oracle 12cR1 Real Application Cluster (RAC) on Oracle Linux 7. I did this installation on O...