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%, and...

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...

Shared SPFILE is recommended strongly in RAC environment, and I want to tell you the reason in this post. The test environment is Oracle 12c 12.1.0.2, and the installed PSU is 21948354. SQL> select...

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 below...

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 the...

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 th...

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 wan...

Need more time to learn the RAC administration, and more practices to master it, so have to postpone the test to Next Wednesday. Hope I can pass it successfully.

These days I tried to install my first Oracle 12c RAC in my test environment, and wanted to experience some new features I have not used before. I have been a Linux SA in several years ago, so at firs...

Today I took the 1Z0-060 test and passed it finally. I did feel great pressure before the test, as I still had so many things to learn until last night. I spent the whole last night to confirm some an...