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I am using the latest version of quick cache pro to date and wordpress 4.
I enabled HTML compression last night with default options. Some tests showed improvement in speed. However this afternoon the site was extremely slow to the point that I got alerts that it was offline.
I opened a ticket with support and they sent me this. After struggling renaming the quick cache plugin directory back and forth so I could disconnect users and get the speed needed to avoid a timeout I was able to disable the HTML compression and all got back to normal again.
The supportsperson sent me the data below (I changed some names on the data for safety). If you need more detailed information, please, be very specific so I can relay the request to support or even get the log files from cpanel myself.
When I strace one of these running PHP processes, it appears that the Quick Cache plugin is causing problems. The processes are frequently waiting for a mutex lock created by this plugin.
It sounds like this might be related to recent changes to Cache Locking in Quick Cache and I'd like to test Quick Cache against the LiteSpeed web server to verify that are no obvious issues with Quick Cache and LiteSpeed.
Note that @LittleBastard77 was running Quick Cache Pro v141231 at the time of this issue.
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