Tag: Oracle

Solving an unusual Oracle upgrade issue

I recently came across a very unusual situation. During an upgraded review, I noticed the dba_registry_sqlpatch was empty when it shouldn’t be: SQL> select patch_id, patch_uid, version, action, action_time, status, description from dba_registry_sqlpatch; no rows selected SQL> The expected output…

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How to Test Data Guard Fast-Start Failover by Shutting Down Standby Server

This post will demonstrate the procedure for testing Oracle Data Guard Fast-Start Failover by shutting down the server where the standby database is running from. The environment is a single instance database without any grid infrastructure components. Review primary host…

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OEM 13c Monitoring Features – Part 4, Corrective Actions

This is the fourth in a series of blog posts covering the most important topics you should know to completely monitor your IT infrastructure with Oracle Enterprise Manager Cloud Control 13c. The previous posts covered how to set up basic…

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How to Test Data Guard Fast-Start Failover by Shutting Down Primary Server

This post will demonstrate the procedure to test Oracle Data Guard Fast-Start Failover by shutting down the server where the primary database is running from. The environment is a single instance database without any grid Infrastructure components. The same process…

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OEM 13c Monitoring Features – Part 3, Reports Based on Metric Data

This is the third in a series of blog posts covering the most important topics you should know to completely monitor your IT infrastructure with Oracle Enterprise Manager Cloud Control 13c. The previous posts covered how to set up basic…

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OEM 13c Monitoring Features – Part 2, Extended Metrics

This is the second in a series of blog posts covering the most important topics you should know to completely monitor your IT infrastructure with Oracle Enterprise Manager Cloud Control 13c. In the previous post, Part 1, we covered how…

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OEM 13c Monitoring Features – Part 1

This is the first in a series of blog posts covering the most important topics you should know to completely monitor your IT infrastructure with Oracle Enterprise Manager Cloud Control 13c.   Oracle Enterprise Manager (OEM) offers solid monitoring capabilities…

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How to Automate Killing Inactive Sessions with Resource Manager

Are you manually (or via a script) killing idle sessions on your database? As a consequence, your users are getting error “ORA-00028: your session has been killed” and probably getting angry at you. What about doing it automatically, in a…

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How To Downgrade Grid 19c Clusterware to 12.1

There may be many reasons for downgrading from Grid 19c to 12.1; however, the reason I am downgrading is to rerun a test requested by Oracle support from the 12.1 clusterware. Here are the steps performed. ### Check cluster: oracle@ol7-121-rac2…

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Mining GoldenGate Error Logs for Consumption Rates of Trail Files

After resolving Oracle GoldenGate issues, a question typically asked is, “When will the process catch up?” The usual method to find out is to use the lag command; however, I was more interested to see the rate of the trail…

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