Metric ‘swap utilisation(%)’ on Grid Control node too high.

Metric ‘swap utilisation(%)’ on Grid Control node too high.

A very short post this time… The metric ‘swap utilisation (%)’ on the node where Oracle Enterprise Manager resides, shows  permanently a very hig value.

Red Hat Linux, 64-bits, 32GB RAM, 4GB swap.

Solution: Eitherway the memory, or the swap-file.

By adding 4 GB to the swap-file to the existing 4 GB (Oracle recommends a lot more by the way in this case) on 30th of March the metric value had the following behaviour, indicating this was the problem:

 

My RAC project with Openfiler, part II – grid infrastructure and database

My RAC project with Openfiler, part II – grid infrastructure and database

This is the second post of my little project of building my own RAC on my Windows7-desktop (64-bits, 8GB RAM), using 3 VM’s (VM-workstation , 7.1.3 build-324285) :

  • 2 VM’s for two RAC-nodes, based on OEL 5.5, 11.2.0.2 for infra, and database.
  • 1 VM as my own SAN, based on Openfiler 2.3 (free), for ASM.

My goal: just a little bit hands-on experience with Openfiler, and do some testing with RAC 11gr2, and especially 11.2.0.2. Maybe it’s helpful for somebody else, so I’ll post my experiences. Steps I’m gonna perform.

–          The first post handled the following:

1.       Planning my installation
2.       Create a VM with OpenFiler
3.       Configure Openfiler
 

–          The second post (this post):

4.       Create a VM as node rac1 and configure ASM
5.       Create a VM as node rac2
6.       Install Oracle RAC Infrastructure
 
7.       Install Oracle RAC software

8.       Install Oracle RAC database

 

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Unable to load module oracleasm with the ‘init’ command

While building my own RAC (11.2.0.2) on two VM’s, using a third VM with Openfiler on it as my SAN, I had to dowload, install, configure and load oracleasm / ASMLIB. Loading didn’t  go smoothly at my own project. First I analyzed what I did, steps I took:

Step 1 : Downloading the right packages from the otn-page. It’s crucial at this point  to know exactly which packages you need, otherwise you may get some vague errors.

[root@rac1 sbin]# uname -r
2.6.18-194.el5
[root@rac1 sbin]# uname -p
x86_64
[root@rac1 sbin]# uname -i
x86_64

You need these three packages:

oracleasmlib-2.0 – the Oracle ASM libraries
oracleasm-support-2.0 – utilities needed to administer ASMLib
oracleasm – a kernel module for the Oracle ASM library

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iscsiadm discovery: no output with Openfiler.

iscsiadm discovery: no output with Openfiler.

I was building my own Oracle RAC 11g cluster (11.2.0.2) with Openfiler as my shared storage. Two VM’s as my rac-cluster, one VM with Openfiler as my own SAN (not using the applicance, used the iso-file).  Followed the instructions of the article of Jeffrey Hunter how to build a RAC on OEL and iSCSI, however this article is not based on VM. Will publish my experiences later on.

My Openfiler-VM (named it ‘Openfiler1’) was ready, given access to my both nodes on iSCSI-level, and now I want my rac1-node to discover the iSCSI-drives on my Openfiler-VM.

Command I used on node ‘rac1’, where ‘openfiler1’ is my Openfiler-VM, on a privileged network:

iscsiadm -m discovery -t st –p openfiler1-priv

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RAC and GFS2 – a misscount

RAC and GFS2 – a misscount

For those who are not that interested in the whole story about RAC, GFS2, the misscount-parameter and Red Hat, I’ll give you the outcome: don’t use RAC (10 or 11) with GFS2 – Red Hat Cluster Suite, it’s a dead end road. For those who are interested, you’re invited…

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