Database & Cloud

I have forgot why I upgraded my blog to PHP7 and MySQL5.7, but I just did it. First have to say, even I had no upgrade plan for such thing. At that time I thought I could upgrade the MySQL rpm to 5.7,...

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 me...

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 sc...

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 situations...

My room has very weak WIFI signal, and sometimes my smartphone will switch to the 4G network automatically. I remembered one night I watched a movie and on the next day I could not access the 4G netwo...

In the past the MAC address of Intel NIC could be changed easily, while now I cannot find such settings in the NIC configurations. From the second answer of this web page: Change MAC address of AC 726...

Will attend NZOUG AKL OTN Day 2016 held on tomorrow. Hope I can arrive at the hotel in time, and have a good luck. :)

I upgraded the plugin W3 Total Cache to the latest 0.9.5 version, then my Website could not work anymore. I checked the error log and got below error message: Class 'W3_Config' not found in /var/www/l...

Last day was a shameful day, and I thought it was a taint in my history. For some reasons I do not want to say too much about it, while I still believe I should record it here, to reminder myself that...

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...