Oracle Exalogic vServer Hung – Running xm dump-core

Have you been tasked with capturing a dump of a VM? Are you running an Oracle VM implementation? Are you using an Oracle Exalogic? Here I’ll show you what options we have to use and my recommended methods to provide the data to support (assuming that is why you are attempting the capture of the […]

You (oracle) are not allowed to use this program (crontab)

Here is the message being faced on our x3-8 Exadata (Note that this can happen on any linux system): [root@ex01db01 etc]# su – oracle [oracle@ex01db01 ~]$ crontab -l You (oracle) are not allowed to use this program (crontab) See crontab(1) for more information Some MOS note that describe NON-ROOT users having difficulty using crontab: Non […]

How to run a sosreport

Working with Oracle Support as much as I have you get asked to run a variety of commands to collect diagnostic data. I will have a series of posts describing the different tools used to collect data across a number of different platforms. Today we will start with SOSREPORT. sosreport – this tool captures important […]

Downgrading ZFS Appliance Software

What is a ZFS appliance? Oracle ZFS Storage Appliance is a hybrid storage system based on a unique cache-centric architecture featuring massive DRAM plus Flash, and is powered by a multithreaded SMP operating system. As a result, 70 to 90 percent of I/Os are served from DRAM, enabling customers to use Oracle ZFS Storage Appliance […]

Upgrading ZFS Appliance Software

What is a ZFS appliance? Oracle ZFS Storage Appliance is a hybrid storage system based on a unique cache-centric architecture featuring massive DRAM plus Flash, and is powered by a multithreaded SMP operating system. As a result, 70 to 90 percent of I/Os are served from DRAM, enabling customers to use Oracle ZFS Storage Appliance […]

Uploading ZFS Appliance Software Patch

What is a ZFS appliance? Oracle ZFS Storage Appliance is a hybrid storage system based on a unique cache-centric architecture featuring massive DRAM plus Flash, and is powered by a multithreaded SMP operating system. As a result, 70 to 90 percent of I/Os are served from DRAM, enabling customers to use Oracle ZFS Storage Appliance […]

Configure Exadata storage cell to receive email notifications

As an Exadata DBA and sysadmin this is one of those important, most crucial configurations you can make for monitoring your storage cells.  Sure the Exadata plugin for EM12C provides alot of information and similar alerting, I have never put all my eggs in one basket.  Setting up SMTP alerting on the storage cells is […]

Resize Exadata /u01 Filesystem

For those of you whom have never performed this type of activity, please reference the Oracle Support document 1357457.1. 1) Grab the current sizing of /u01 filesystem [root@DM01DB01 ~]# df -h |grep -i u01 Filesystem Size Used Avail Use% Mounted on /dev/mapper/VGExaDb-LVDbOra1 99G 16G 78G 17% /u01 2) Stop your oracle databases, oracle crs, monitoring […]