Thank you for your question. The server does not cache anything by default, so if your site is caching I recommend checking if there are caching plugins/addons installed such as wp-supercache.
If there is not, then check your browser cache settings, or clear your browser cache.
It is not required to restart the web server, and this would not be possible in a shared environment.
If you have any further questions, feel free to post them below.
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