Class ‘W3_Config’ not found

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/w...
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A shameful day!

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 t...
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SPFILE in RAC environments

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> se...
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