Monitoring the metrics and runtime characteristics of an application server is essential to ensure the adequate functioning of the applications running on that server, as well as to prevent or resolve potential issues in a timely manner.
As far as Java applications go, one of the most commonly used servers is Apache Tomcat, which will be the focus of this article.
Tomcat performance monitoring can be done either by relying on JMX beans or by using a dedicated monitoring tool like MoSKito or JavaMelody.
ShadowSocks默认使用GFWList规则和使用adblock plus的引擎。要想自己添加自定义的用户规则，最好熟悉一下其规则。当一个网站被墙，如何添加到PAC里面让其能够正常访问呢？以MDN web doc这个网站为例，在Shadowsocks里面，可以有如下两个方式：使用pac.txt文件，或使用user-rule.txt文件。
Caching is a useful yet surprisingly complex feature of web browsers.
In this article, we’ll explain the how the browser uses its cache to load pages faster, which factors determine cache duration, and how we can bypass the cache when necessary.
If it’s taking more than 3 seconds then you should be really worried about your site speed. Because No-one really likes slow loading websites.
There is no meaning of doing all the hard work to produce amazing content because if your website is too slow to load, the user is going to get bounced from your website.
So if you are really worried about your website speed and want to optimize it for your user and SEO you are at the right place.