Oracle – Page 4 – Database & Cloud

Know something about Flex ASM

After several days I finally learned that the Flex ASM could just worked in a cluster.When I first got this feature, I tried to build two servers, one is DB server, and another is ASM server, and wa...

17/02/2016Oracle133 viewsComments

Failed today

Today I failed the test, while I thought it is good for me.I didn't prepare well for the test, and the timeline was too urgent for me. I tried to learn all the things but in fact I almost lost all t...

25/02/2016Life101 viewsComments

Keep Alive Setting in Oracle DB Server and Client

In our daily work, one popular question is how to keep our session alive, especially for Oracle session.I know there is a parameter named sqlnet.expire_time in the sqlnet.ora for such function in ...

14/03/2016Oracle3,400 viewsComments

Dangerous behavior of ‘create spfile’ in 12c RAC

These days I was testing some commands of the system parameters and the PFILE/SPFILE, and unfortunately, I encountered a really bad bug in my test environment.My RAC DB is 12.1.0.2.0, and I did be...

11/04/2016Oracle1,311 viewsComments

CIFS VFS: No response to cmd

I never thought mounting a shared filesystem maybe cause server reboot!One node in a three-node RAC database was rebooted without any reason, and I was contacted to find the possible reason.I ...

28/01/2018Linux819 viewsComments

Big ambition — want to translate the famous ‘Oracle Core’

To accelerate my reading speed, I bought a translated book of 'Oracle Core - Essential Internals for DBAs and Developers', while I found many times I had to read the original English version to know s...

20/04/2016Life151 viewsComments

Got Oracle 12c RAC Expert certificate

I almost cannot believe I passed the 1Z0-068 test!I failed on July 5 as the passing score for RAC part was 66%, while these days I got a email and found the passing score has been lowered to 60%, ...

16/09/2016Life123 viewsComments

Perl and new Intel CPUs with 4 level cache

Last day I took a task to fix a network issue about Oracle 12c on Windows.At the beginning, I though it was a misconfiguration issue, and could be fixed within one hour, or in some special situati...

22/02/2017Oracle441 viewsComments

Scheduling policies for mirrored volume on AIX system

On the day before last day, I helped my friend to handle an Oracle block corruption issue of her SAP system.From the alert log file, I found many error messages of corrupted blocks, and I tried to...

11/03/2017Unix203 viewsComments

ORA-00443: background process “PMON” did not start

On the day before last day, my client told me the resource of EC2 instance had been increased, so I decided to increase memory setting for Oracle instance.The total memory was 4G, so I changed the...

26/03/2017Linux3,800 viewsComments

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