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How to set up data guard broker for RAC
This is pretty much a note to myself on how to set up Data Guard broker for RAC 11.2.0.2+. UPDATE: Please note that a lot of this has changed in 12.1, as described in a different blog post of mine (Little things worth knowing: Data Guard Broker Setup changes in 12c). If you are looking for…
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Little things worth knowing-static and dynamic listener registration
As part of a recent project to remove a vulnerability in relation to CVE-2012-1675 it became apparent that there are certain misconceptions around dynamic and static listener registration which are hard to get rid of. The below is applicable for single instance Oracle only! Now let’s start with a quiz: what does the following output…
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How to use vi-style editing in SQL*Plus
This post is nothing new, and I created it after a little discussion on twitter about how to use readline support in SQL*Plus. The idea is not new, and I have compiled and used rlwrap for quite some time. At the time, Frits Hoogland asked me why I didn’t use the EPEL package-and I had…
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Kernel UEK 2 on Oracle Linux 6.2 fixed lab server memory loss
A few days ago I wrote about my new lab server and the misfortune with kernel UEK (aka 2.6.32 + backports). It simply wouldn’t recognise the memory in the server: Ouch. Today I gave it another go, especially since my new M4 SSD has arrived. My first idea was to upgrade to UEK2. And indeed,…
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The new lab server has arrived
Update: the Oracle Linux memory problem is solved: https://martincarstenbach.wordpress.com/2012/06/13/kernel-uek2-on-oracle-linux-6-2-fixed-lab-server-memory-loss/ As part of an on-going research project I have invested a little bit of money towards a new lab server. Sadly my Phenom II X6 with 16GB RAM was not on the HCL for ESXi 5 which I required. Before I knew that ESXi can itself be virtualised…
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Performance testing with Virident PCIe SCM
Thanks to the kind introduction from Kevin Closson I was given the opportunity to benchmark the Virident PCIe flash cards. I have written a little review of the testing conducted, mainly using SLOB. To my great surprise Virident gave me access to a Westmere-EP system running a top of the line 2s12c24t system with lots…
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OT: I want this (WordPress) theme
Apologies for a completely non-technical blog item – feel free to skip! However, if you have used a Mac SE like I have, running on System 6, then you’d love this WordPress theme I just discovered: Unfortunately I can’t use it as most of the source code I’m posting is too wide. I can almost hear…
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NIC confusion when cloning virtual machines in ESX5i
A few twitter posts have already indicated that I have a new machine in my study-a Supermicro server with the H8DGi6-F motherboard, 2 12-core AMD 6238 processors and 32 GB RAM. And since I have been given a vSphere 5 Enterprise Plus license, what better to test than this combination! I have to say the…
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Little things I didn’t know: difference between _enable_NUMA_support and numactl
In preparation for a research project and potential UKOUG conference papers I am researching the effect of NUMA on x86 systems. NUMA is one of the key features to understand in modern computer organisation, and I recommend reading “Computer Architecture, Fifth Edition: A Quantitative Approach” from Hennessy and Patterson (make sure you grab the 5th edition).…
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