ODA 19.11.: ORACLE_HOMEs on ACFS
Introduction Beginning with Oracle Database Appliance (ODA) 19.11. the ORACLE_BASE and ORACLE_HOMEs are created on ACFS. That’s good news, because there is much more space on ASM than on the internal...
View ArticleExadata Cloud at Customer: Considerations for Backup & Recovery
Working in a project where the customer migrates from an on-premises environment to Exadata Cloud at Customer provides insights about the decisions to take and what to consider when using the Exadata...
View ArticleMacOS: Reduce fan noise when using Microsoft Teams
The Laptop I’m using for the business is a MacBook Pro, model 2019 (2.6 GHz 6-Core Intel Core i7). I’m thankful to be able to choose the Hardware and OS of my business laptop at dbi services. We have...
View ArticleScript to calculate the network latency between the application and the...
By Clemens Bleile Network latency is crucial for applications, especially if lots of “row by row”-processing (some call it “slow by slow”-processing) is used by the application or if lots of data is...
View Articleopatch hangs while patching OEM 13.4. concerning the log4j-vulnerability
By Clemens Bleile To address the log4j-vulnerability I recently had to fix the Oracle Enterprise Manager 13.4.-installation for a customer. REMARK: Please check the following link for details...
View ArticleOracle Database Appliance (ODA): Adjusting to the new ORACLE_BASE-setting...
By Clemens Bleile From Oracle Database Appliance (ODA) version 19.11. onwards the ORACLE_HOMEs and ORACLE_BASE will be created on ACFS, i.e. take space from an ASM-diskgroup instead of taking...
View ArticleOracle Database Appliance: Install a DB Release Update manually
By Clemens Bleile Recently I upgraded an ODA X7-M from 19.12. to 19.13. After the dcs-, server- and storage-upgrade several databases on the machine had to be patched from 19.9. to 19.13. The...
View ArticleOracle DBs and ransomware attacks
By Clemens Bleile I had a discussion with a customer recently about the risk of running into an issue with ransomware encrypting data of Oracle databases. Just to quickly recap on what ransomware is:...
View ArticleWhy do we still have HEIGHT BALANCED Histograms and how to get rid of them?
A customer, who is on 19c with his Oracle databases asked me recently why he still has Height Balanced Histograms in his database? E.g. SQL> select histogram, count(*) from dba_tab_columns where...
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datapatch fails when running against an Oracle Container Database because of...
When going to 19.15. a customer hit this error when running datapatch: Unsupported named object type for bind parameter at /u01/app/oracle/product/19.0.0.0/dbhome1915/sqlpatch/sqlpatch.pm line 5849,...
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Running Intel x86-64 VMs with an Oracle DB on Apple Silicon (ARM)
For testing purposes many IT-people traditionally use Virtual Machines (VMs) on their Laptops (often on Oracle Virtualbox). Since Apple moved to its own processor type (Apple Silicon, i.e. ARM...
View ArticleLatency test from Client to Oracle DB: Minimum number of rows fetched in...
Some time ago I wrote a Blog on how to calculate the network latency fetching a row to a Client from an Oracle database. The tool I used was sqlcl, because it just requires Java and hence no Oracle...
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VirtualBox on Mac Host: High CPU utilization for idle VM
Many people in the IT industry do use VirtualBox as a Type-2 Hypervisor to test software in virtual machines. I’m using it with Vagrant on my Macbook Pro 2019 (Intel with Ventura 13.2. when writing...
View ArticleConsiderations when backing up from the Oracle Standby Database (Data Guard)...
To reduce load on the Primary DB in a Data Guard configuration you may decide to do your rman backups from the Standby site. A very common approach today is to use NFS as the backup location,...
View ArticleOracle: Is it possible to setup a system that a client (specific IP address)...
Problem description In a recent consulting assignment I got the following task: A server with a specific IP address (Application server or Oracle Client) should be able to connect to a specific...
View ArticlePatching ODA to 19.18.: Error in sshd_config
I recently patched an Oracle Database Appliance (ODA) from 19.16. to 19.18. Detailed steps on how to patch to 19.18. are available here. During the update-server step I got the following error: #...
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Installing Oracle 23c Free developer release on Proxmox
Oracle provides an OVA (Open Virtual Appliance) file to install the 23c Free Developer Release on Virtualbox. An OVA file contains metadata and file elements in the Open Virtual Format (OVF) to...
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Building a transportable Oracle Sandbox environment for an Apple Silicon...
Since Apple released their Apple Silicon Laptops based on the ARM processor architecture, it became difficult for Consultants with such a device to run their Oracle Sandbox environment, because the...
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Running an Oracle Database 19c on Apple Silicon (Apple Macbook Air M1)
By end of June 2023 Oracle announced the availability of Oracle 19c for the Arm-architecture (aarch64). Consultants and DBAs, who do use a Mac Laptop with Apple Silicon (M1 or M2), have waited quite a...
View ArticleOracle Database Appliance (ODA): Some listeners do not start anymore when...
A colleague of mine had the issue some time ago and I recently experienced the same behaviour at a customer’s ODA: A couple of Listeners did not start when booting. Starting them as user grid with...
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