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 […]

Hugepages on Exadata? Yes and No… part3

Finally after over 6 weeks got a response back regarding hugepages on Exadata. Yes, hugepages is supported on Exadata platforms, with no changes from a standard linux platform. ie.. while it’s supported, there is nothing specific to exadata in it’s setup. There it has been stated by MOS that it will be supported. I really […]

resync catalog from db_unique_name all — fails ***UPDATE

Previously I talked about ‘RESYNC CATALOG FROM DB_UNIQUE_NAME ALL;’ (LINK) and the issues we have faced.  As promised here is some followup. Oracle had asked us to perform a few steps. The first was to test 2 new net service names in the tnsnames.ora file on both the primary and the standby database.  Here is […]

Hugepages on Exadata? Yes and No… part2

So I got my update from Oracle Support… Michael, please review the following 2 documents, and let me know if more information is needed: Doc ID 361468.1 – HugePages on Oracle Linux 64-bit Doc ID 1284261.1 – Enabled Hugepages In Exadata V2 Database Machines are not used at startup I had mentioned to the engineer […]

Hugepages on Exadata? Yes and No… part1

The topic of enabling hugepages on our Exadata environment.  Just opened an SR with Oracle Support to get some clarification.  I know that it is not enabled on the database servers, but is on the cell servers. Here you can see the database version we are using: Here you can see that hugepages in /etc/sysctl.conf […]

SEV 1 SR – 8 Node Exadata Database Hang – Update 3

Before I get to the workaround that we are currently using in the event this happens, I would like to share with you that we are having the problem.  Oracle is still having us perform actions.  I’ll provide you what we are doing first, then I will share the workaround. Oracle wanted us to enable […]

SEV 1 SR – 8 Node Exadata Database Hang

We’ve had an issue for the past ohh  6 hours with a production Exadata cluster.  It started out with random instances of  our database coming down and then starting backup. Some of the initial errors were: ORA-600 internal errorCF EnqueueParallel Query Interrupt So our database is 11.2.0.1.  The exact Parallel Query Interrupt error we received […]