Infrastructure at your Service

Category Archives: Operation systems

Oracle Team

OEL 7 – Project Quotas on Oracle Homes with XFS on Oracle Linux 7

By | Operation systems | No Comments

By William Sescu User and group quotas do exist for quite a while for all kind of file systems, like ext4 or vxfs and maybe many others. However, for my use case, I do need quotas for different directories on the same file system. My mount point is /u01 and in that file system, I do have different Oracle Homes which belong to the same user, oracle. However, I do not want that my 11.2.0.4…

Read More
Oracle Team

OEL 7 – How to disable IPv6 on Oracle Linux 7

By | Operation systems | 3 Comments

By William Sescu In case you are not interested in IPv6, you can use the following HowTo to disable it on Oracle Linux 7. Unless you have something very very special on your System, these 10 Steps should do it. First of all, check if IPv6 is active at all Add the disable_ipv6 = 1 entries to the /etc/sysctl.conf file Disable IPv6 in all /etc/sysconfig/network-scripts/ifcfg-* files, e.g. Disable IPv6 in /etc/sysconfig/network Remove the “::1″ line…

Read More
Nathan Courtine

Manage Azure in PowerShell (RM)

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

Azure offers two deployment models for cloud components: Resource Manager (RM) and Classic deployment model. Newer and more easier to manage, Microsoft recommends to use the Resource Manager. Even if these two models can exist at the same time in Azure, they are different and managed differently: in PowerShell cmdlets are specific to RM. In order to be able to communicate with Azure from On-Premises in PowerShell, you need to download and install the Azure…

Read More
Joël Cattin

OTN Appreciation Day : OSWatcher Black Box Analyzer (OSWBBA)

By | Operation systems | 3 Comments

Following my last blog post about OSWatcher, I will present in this one OSWatcher Black Box Analyzer (OSWBBA), which is the tool that you can use to display graphically the data collected by OSWBB. This tool is a Java utility and exists since OSWatcher version 4.0.0. It permits to create graphs and complete HTML reports containing collected OS statistics.   OSWBBA require no installation. It is embedded in the OSWatcher home directory. To start the…

Read More
Joël Cattin

OTN Appreciation Day : OSWatcher Black Box (OSWBB)

By | Operation systems | No Comments

In this post, I will present a usefull and easy-to-use Oracle tool : OSWatcher. What is it ? OSWatcher Black Box (OSWBB), for its full name, is a free Oracle Tool which will help you to diagnose performance issues on the OS side. Of course, it will not solve the issue for you, but it gives a system health state at a given moment. OSWBB is multi-platforms supported (AIX, Solaris, HP-UX, Linux and Windows) and…

Read More
Georges Grey

Disable Red Hat 7 Transparent Hugepages

By | Database Administration & Monitoring, Operation systems | No Comments

Ausgangslage Ein Kunde hat mich kürzlich angefragt, wie am effizientesten alle Kernel Tuning Parameter für Oracle bei Red Hat 7 konfiguriert werden können. Daraus habe ich untersucht welche Möglichkeiten es gibt, ausser dem seit langer Zeit bekannten /etc/sysctl.conf. Bei dieser Analyse führt der Weg natürlich über tuned. Dieser Dienst erlaubt es Profile zu definieren welche ein ganzes Set von Kernel Tuningparametern enthält. Das habe ich bereits in einem BLOG “Stay tuned with kernel parameters” publiziert. Tuned…

Read More
Nathan Courtine

Generate Azure VM with Resource Manager deployment in PowerShell

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

Recently, there is a new way to manage the Azure infrastructure with Resource Manager. It brings many advantages regarding the classic deployment. The differences between these two deployments will not be covered in this blog because it is not the initial goal, and it already exists a very good Microsoft topic on this subject. In this blog, we will generate a new Windows Azure Virtual Machine using Resource Manager deployment with PowerShell from On-Premise. Remember,…

Read More
Oracle Team

List usernames instead of uids with the ps command for long usernames

By | Database management, Operation systems | No Comments

By William Sescu Have your ever faced such a situation. You have usernames in your /etc/passwd file with more than 8 characters. This is no problem for Linux at all, usernames may be up to 32 characters long, only your ps output might look a little scrambled. It shows you the uid instead of the username like in the following example: $ id uid=20001(longuser01) gid=10002(oinstall) groups=10002(oinstall) $ sleep 1000000 & $ ps -ef | grep…

Read More
Oracle Team

How to do a Filesystem Resize (ext3/ext4) on Redhat running on VMware

By | Database Administration & Monitoring, Operation systems | No Comments

By William Sescu A filesystem resize can be done in several ways, online, offline, with LVM2 or without LVM2.  However, this blog will describe how to do an online resize of ext3/ext4 filesystems where a virtual disk (vmdk) is online added to a VMware Redhat guest OS. So let’s start with the online filesystem resize of ext3/4 filesystems on the Redhat guest OS.  A new virutal disk (preferably an eagerd zero thick on VM running…

Read More

Shrinking Oracle VM VirtualBox with Zerofree

By | Hardware & Storage, Operation systems | No Comments

In this blog I would like to talk about Shrinking a Virtual Machine with Oracle databases and MySQL which is install. Unfortunately, whilst Virtual Box will dynamically expand the hard drive as it’s required, it won’t dynamically shrink it again if you free up space in the VM. The good news is You can shrink a dynamic Virtual Box disk image and so reduce the size of your VM infrastructure. I have use the Zerofree…

Read More