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Robert Jackson

Having studied a generic Business Computing degree at university, I was fortunate to do my work placement as an Oracle DBA. I enjoyed the challenges of the job and found that my skills were suited to it, also.
Since graduating with a 1st class honours degree in Computing - Database Systems, I have worked my way up from a Junior Oracle DBA to a DBA Team Leader.

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Robert Jackson's Latest Posts

Invalid SYS Objects after 10g to 11g Upgrade

The Problem When upgrading from 10.2.0.4 to 11.2.0.1, and applying the latest patchset, which was patchset 8 at the time of writing this, I found there to be several invalid objects in the SYS schema. I raised an SR with Oracle support who informed me that I could drop these objects because they were no […]

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Duplicate SYS Objects after 11g Upgrade

Duplicate SYS Objects after 11g Upgrade The Problem After an 11g upgrade you see the following presented to you: =================================================== Number of Duplicate Objects Owned by SYS and SYSTEM =================================================== Counting duplicate objects …. COUNT(1) ———- 4 ========================================= Duplicate Objects Owned by SYS and SYSTEM ========================================= Querying duplicate objects …. OBJECT_NAME                      OBJECT_TYPE ——————————-  ——————- AQ$_SCHEDULES                   […]

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11g High Version Count – Bind Mismatch

The Problem While running Oracle version 11.2.0.1 I noticed that there were a high number of SQL statements which had a high version count. The CURSOR_SHARING parameter was set to FORCE. When looking in V$SQL_SHARED_CURSOR you will see a Y in the column BIND_LENGTH_UPGRADEABLE. The Cause The reason for this happening is described in detail in […]

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