If you are unable to send attachments from your plesk panel after you have upgraded Plesk on your dedicated server or dedicated cloud VM, check the permissions of the .horde dir in /tmp. The dir permissions should be set as this:
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Creating a PHP REST Routing Class for Your Application
The main features typically are: REST Routing Use different HTTP methods for same URL’s to determine different types of action / request Support dynamic URL segments Provide the capability for reverse routing; creating the destination URL from an array of route variables SEO friendly URL’s using a .htaccess to route all URL’s into your class
Optimize linux server prevent OOM
I’ve done numerous optimizations to prevent this freeze.
OOM killer "Out of Memory: Killed process"
You can check the status of low & high memory a couple of ways:
Red Hat Enterprise Linux 6 drops packets when the route for outbound traffic differs from the route of incoming traffic?
Issue Why does Red Hat Enterprise Linux 6 drops packets when the route for outbound traffic differs from the route of incoming traffic? Why does Red Hat Enterprise Linux 6 differ from Red Hat Enterprise Linux 5 in handling asymmetrically routed packets?
How to enable http compression on a Plesk server?
What is http compression and which module to use for http compression? Compressing data before transmitting to the browsers and then uncompressing the data before displaying. The module that is responsible for http compression is called mod_deflate.The main advantage of mod_deflate is that it saves a lot of bandwidth and loads the pages faster.