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Shut the front door!
Today i thought i'd discovered a major issue with 12c - os authenticated accounts did not seem to be working in 12.1.0.2 (but were ok in 12.1.0.1).So for example if i saycreate user ops$oracle...
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'Offline' logminer and encryption
This week I've been using logminer to perform some analysis of one of our live systems where we see a pattern of data we don't expect and we want to track down all the transactions that modify a...
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Patching glassfish
Some time ago we finally moved one of our critical java apps from being hosted on Borland Enterprise Server (BES or BAS as it's known) for which we seemed to be practically the only customer in Europe....
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12c and streams (and lack of CDC)
This is a 2 part post - but they are essentially standalone (and i haven't actually written or tested any of part 2.....)So some background, we plan to upgrade out 9.2.0.4 database (yes i know....) to...
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12.1.0.2 ->11.2.0.2 via rman restore
We've attempted an upgrade this week of one of out 11.2.0.2 systems to 12.1.0.2, this ended badly with some weird problem with acl's and timestamp with timezone datatypes messing it up.ERROR =...
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Tuning the untunable?
As part of an application migration we have to run a script that moves the schema from version x to version y. This schema upgrade process involves running an executable that works out what version of...
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ASM migration from one disk array to another
We're undertaking a storage migration in some of our data centres from one vendor to another so all of the content has to be moved over to allow the old system to be switched off (and probably thrown...
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When you miss the obvious.....
Ever had one of those days where you start looking at something, miss the obvious then get deeper and deeper into looking for the 'obscure' bug that is causing something to happen.That happened today -...
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12c gotcha
We've been working on a number of 12c upgrades recently but today was the first time we hit this particular issue.The developers contacted me with the following screenshotThis had never happened before...
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PSU's revisited - 12c changes and lying databases........
I previously posted some information about how cloud control could gather all the PSU information for all the database in your estate (here)However it seems there are a couple of issues with this as it...
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12c dataguard issue....
So this past week we've been doing some more 12.1.0.2 migrations - for the first time we are doing it in a system that has dataguard in place.The upgrade itself was fine, no issues there but we...
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Setup Zabbix monitoring with Oracle back end repository
We currently have a number of monitoring tools in place in the organisation (about 5 at last count - and there may be more....). None of them seems to do exactly what the organisation wants as...
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Dataguard 12c issue - workaround
To follow up on my earlier post about 12c dataguardhttp://dbaharrison.blogspot.de/2015/03/12c-dataguard-issue.htmlI've now developed a fix - it's just a one line addition to the startup trigger (in the...
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Tracking individual process resource usage in cloud control
This week i was asked if cloud control could track memory and cpu usage of individual processes - so for example show me the resource usage of "someprogram.exe" over time. My initial reaction was 'no',...
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Creating a proper standby usable with dgmgrl as basic as possible
In a earlier series of pointless posts i described how to create some basic setup as simple as possibleI had a simple database...
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Sqlplus and empty lines
At some point you've probably hit the issue that sqlplus does not like commands with blank lines in them - there is an easy fix for it though and it seems there is also something inbuilt that can...
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SID in a multitenant world
I came across an interesting issue today that i thought was worth sharing that will affect some legacy style connections to the database.Many years ago (and I'm talking a lot here) oracle introduced...
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12c and the curious case of the database that wouldn't start
Our 12c rollout continues apace at the moment yesterday one of my colleagues came across this very odd issueWhen creating a new database with a very basic parameter...
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The sample schemas - why so complex?
I've recently had cause to try and install the sample schema(OE,HR and the like). I can;t remember actually the last time i ever did this, in fact i don't think i ever did - these sample schemas came...
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Migrating a big old 10g database to a new home
I recently blogged about migrating a database into ASM, this week I've just had to migrate a normal filesystem based database from one disk array to another leaving it as normal filesystems.The system...
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