1. **Until what point in time does JSF save the state of UI components on the server side &amp; when exactly is the UI component&#39;s state information removed** from the server memory? As a logged-in user on the application navigates though pages, will the state of components keep on accumulating on the server?

2. I don&#39;t understand **what is the benefit of keeping UI components state on server !?** Isn&#39;t directly passing the validated/converted data to managed beans enough? Can I or should I try to avoid it? 

3. Doesn&#39;t that consume *too much* memory on the server side, if there are thousands of concurrent user sessions? I have an application where users can post blogs on certain topics. This blogs are quite large in size. When there will be post back or request for viewing the blogs, **will this big page data be saved as a part of the state of components?**  This would eat up too much memory. Isn&#39;t this a concern ?

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Update 1:
===
Now, it is no longer necessary to save state while using JSF. A high performance Stateless JSF implementation is available for use. See this [blog][1] &amp; [this question][2] for relevant details &amp; discussion. Also, there is an open [issue][3] to include in JSF specs, an option to provide stateless mode for JSF. 
(P.S. Consider voting for the issues [this][3] &amp; [this][4] if this is a useful feature for you.)

&lt;br/&gt;

Update 2 (24-02-2013):
==
A great news that **Mojarra 2.1.19** is out with **stateless mode**!

See here:

http://weblogs.java.net/blog/mriem/archive/2013/02/08/jsf-going-stateless?force=255

http://java.net/jira/browse/JAVASERVERFACES-2731

http://balusc.blogspot.de/2013/02/stateless-jsf.html



  [1]: http://industrieit.com/blog/2011/11/stateless-jsf-high-performance-zero-per-request-memory-overhead/
  [2]: https://stackoverflow.com/questions/10385340/jsf-state-saving-initially-to-server-on-session-timeout-transfer-to-client
  [3]: http://java.net/jira/browse/JAVASERVERFACES_SPEC_PUBLIC-1055
  [4]: https://issues.apache.org/jira/browse/MYFACES-3465

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Why JSF saves the state of UI components on server?