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When emails go missing in AOL Mail, it's often due to a few simple things; either the message is in the wrong folder, your third-party mail client's settings, or your account was deactivated due to inactivity.
Firefox, Chrome, Safari, and Opera will, under some circumstances, fetch resources before they need to render them, so that the resources can be used faster if they are needed. This technique, prerendering or pre-loading, may inflate the statistics for the browsers using it because of pre-loading of resources which are not used in the end.
Obviously you shouldn't do exactly the same thing again, but don't be afraid to do similar things. If you get chastised for trying to delete Wikipedia:Sandbox and crashing the site, don't try to delete the same page again, but also don't fearfully count the revisions of every page you want to delete. This damages Wikipedia far more than a minor ...
Google has been updating its algorithm for as long as it has been fighting the manipulation of organic search results. However, until May 10, 2012, when Google launched the Google Penguin update, many people wrongly believed low-quality backlinks would not negatively affect a site ranking; Google had been applying such link-based penalties [9] for many years but not made public how the company ...
Replication lag is what happens when there are multiple data servers and one or more of these servers are delayed and out-of-sync with what would be considered the "current" state. The time between the "current" state and the state that the server is perceiving and returning is called the replication lag .
A forward cache is a cache outside the web server's network, e.g. in the client's web browser, in an ISP, or within a corporate network. [3] A network-aware forward cache only caches heavily accessed items. [4]