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Commas at the beginning or end of a sql code line
Back in Nov 2015 I commented on a Oracle-L discussion about What happened to SQL*Developer SQL Formatter asking why people liked to see a comma at the beginning of the line in sql code and there was a...
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Flashback database – dont forget the standby
Today an application team had a problem with a production system and they wanted the database restored to a point a couple of days ago. It is a configuration management system and they figured they...
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Resolving two errors on Datapump export – parameter cluster=N/Y
I attempt to export a table with 76,000 rows using a relatively standard datapump command expdp schemas=ODI_TEMP cluster=y directory=MCB content=ALL dumpfile=OEC_%U.dmp...
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Reorganising data within tablespaces
I am currently interested in managing storage on our Exadata platform which is primarily used for running a data warehouse. The ongoing challenge is that most of the large tablespaces use a bigfile...
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Performance problems with OEM AWR warehouse
The Enterprise Manager AWR Warehouse is designed to hold performance data from multiple databases for long-term analysis. It promoses that it will save storage and improve performance on your...
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RMAN checksyntax function
I was looking at the RMAN DEBUG options and came across the CHECKSYNTAX function which I had not used before. Firstly a quick recap on the DEBUG option. This can be called using the following syntax...
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Xmas day -150 hits. What is wrong with the world
Yes, very tongue in cheek. I know everyone does not celebrate Xmas. I was still surprised though. This is what was viewed Best wishes for 2017 to all my readers.
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Problem with V$RECOVERY_AREA_USAGE view and FRA space not being reclaimed
We received the following alert from our alerting system Flash Recovery Area for FOLPRD1A has 9.97 percent of usable space left. This is a standby database: HOST INSTANCE STATUS...
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GoldenGate – Restarting a replicat with the command filterduptransactions
If a Goldengate replicat process fails then occasionally on the restart it skips the correct RBA and ‘loses it’s position’. The relative byte address (RBA) is the location within the trail file to...
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What is the future for an Oracle DBA?
I have worked with Oracle databases for around 25 years now and during that time I have been very fortunate in that there has always been work for DBAs and it has been one of the higher paying...
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Downgrading a RAC database from 11.2.0.4 to 11.2.0.3
It is not often that I see a database downgrade activity performed and so I thought it would be worthwhile just noting how it was done. 2 node RAC 11.2.0.4 database to 11.2.0.3, downgraded the...
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Using DataGuard broker to show apply lag and throughput
To determine how much lag there is I normally run a script similar to this select sequence#, applied, to_date(to_char(first_time,’DD-MON-YY:HH24:MI:SS’), ‘DD-MON-YY:HH24:MI:SS’) “First Time” ,...
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HP Systems Management vacancy
I know I do not have the right readership on this blog for a Systems Management vacancy but if any readers have colleagues who have experience using any of HP Openview, OpsBridge, HP Service Management...
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Managing the WINDOW_ID in Goldengate V11.2.1.0.33
When we import data into the landing schema on a Dat Warehouse via Goldengate, we add 3 fields to each record detailing when and how the record got loaded. This can be found in the *.inc files under...
View ArticleBaselines – session creating privs v session running privs
A colleague Richard Wilkinson was telling me about an issue he had come across with baselines and I asked him to write it up as it was an interesting experience. The following MERGE SQL runs once a...
View ArticleDBA vacancy Bradford, West Yorkshire
I have a vacancy in my team and the details are in the link below https://apply.morrisons.jobs/vacancies/2137/technology-specialist–database.html Lots of interesting work going including 85Tb Data...
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How to add a metric extension and use a ‘control’ table to test results
I have previously blogged about creating a User Defined Metric (UDM) before (7 years ago!) but the method I am using today demonstrates how you can test out the alert using specific data. The aim was...
View ArticleORA-01450: maximum key length (3800) exceeded
This is an oddity as essentially I have an index on a table but I cannot rebuild it because it suggests the block size should be bigger than 8K – however both the database and tablespace block size are...
View ArticleCreating a database link using a tnsnames entry
I have had this in my draft posts for a couple of weeks and I refrained from publishing because it was too simple. However the main purpose of this post is to help others save time by providing useful...
View Article12C Grid – GENO process causes high CPU usage
This is an interesting bug which has affected a number of our databases – perhaps because we are not patched to the latest levels in every case. The MoS note is this one – Patch 20373598: GEN0...
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