Infrastructure at your Service

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Hardware & Storage

Jérôme Dubar

Patching or reimaging your ODA?

By | Database Administration & Monitoring, Hardware & Storage, Operation systems, Oracle | No Comments

Introduction One of the key features of the ODA (Oracle Database Appliance) is the ability to patch the entire stack every three months, the goal being to keep all the components up-to-date. Most of the customers won’t patch so often, but one patch a year is quite a good average. But when comes the time for patching, comes the time for anxiety for the DBA. And it’s totally justified. Why ODA patching can eventually be…

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Oracle Team

When you change the UNDO_RETENTION parameter, the LOB segment’s retention value is not modified

By | Database Administration & Monitoring, Database management, Development & Performance, Hardware & Storage, Oracle | No Comments

Below, I will try to explain, a particular case for the general error : ORA-01555 snapshot too old error.. Normally, when we have this error, we are trying to adapt the retention parameters or to tune our queries. SQL> show parameter undo; NAME TYPE VALUE ———————————— ———– —————————— temp_undo_enabled boolean FALSE undo_management string AUTO undo_retention integer 3600 –extended from 900, undo_tablespace string UNDOTBS1 But, are some scenarios where the above rule is not working . We…

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Jérôme Dubar

How to patch your ODA lite to 18.3.0.0.0

By | Database Administration & Monitoring, Database management, Hardware & Storage, Oracle | 4 Comments

Even you don’t need 18c, or you’re not ready for this release, this patch will also update your 11gR2, 12cR1 and 12cR2 databases to the latest PSU available on ODA, it means for example the patchset from last July if you’re using 12cR1. Here is how to apply this latest patch for your ODA lite. In this example, the patch was applied on an X6-2S ODA running on previous release: 12.2.1.4.0. 1) Download the patch…

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Mouhamadou Diaw

Monitoring Linux With Nmon

By | Hardware & Storage, Operation systems | One Comment

I was looking for tools to monitor linux servers and I found an interesting one nmon ( short for Nigel’s Monitor). I did some tests. In this blog I am describing how to install nmon and how we can use it I am using a Oracle Enterprise Linux System. [[email protected] nmon]# cat /etc/issue Oracle Linux Server release 6.8 Kernel \r on an \m [[email protected] nmon]# For the installation I used the repository epel wget http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm…

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David Hueber

ODA 12.2.1.2.0: Some curious password management rules

By | Database Administration & Monitoring, Hardware & Storage | One Comment

While deploying an ODA based on the DCS stack (odacli), it is mandatory to provide a “master” password at appliance creation. The web GUI provides for that a small tooltip which describes the rules applied on password management. However it looks like there is some flexibility with those rules. Lets try to check this out with some basics tests.

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Nicolas Penot

Migrate Oracle Database(s) and ASM diskgroups from VMWARE to Oracle VM

By | Database Administration & Monitoring, Database management, Hardware & Storage, Oracle | No Comments

This is a step by step demonstration on how to migrate any ASM disk groups from a cluster to another. May be use, with or without virtualization and may be used with storage layer snapshot for fast environment provisioning. Step 01 – Shutdown source database(s) on VMWARE servers Shutdown all databases hosted in the targeted Disk groups for which you want consistency. Then unmount the disk groups. $ORACLE_HOME/bin/srvctl stop database -db cdb001 $ORACLE_HOME/bin/asmcmd umount FRA…

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David Hueber

ODA X7-2S/M 12.2.1.2.0: update-repository fails after re-image

By | Database Administration & Monitoring, Hardware & Storage | 5 Comments

While playing with a brand new ODA X7-2M, I faced a strange behaviour after re-imaging the ODA with the latest version 12.2.1.2.0. Basically after re-imaging and doing the configure-firstnet the next step is to import the GI clone in the repository before creating the appliance. Unfortunately this command fails with an error DCS-10001:Internal error encountered: Fail to start hand shake to localhost:7070. Why not having a look on how to fix it…

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