jkeyes

Revision History displays the revision history of a post or page, with links 
to the content of each revision.
The revision history is appended to the <code>content</code> of the post or page.
The following are configuration settings which can be changed in the Revision 
History submenu of ‘Settings’.
<ol>
<li>Display on pages.</li>
<li>Display on posts.</li>
<li>Show autosave revisions.</li>
<li>Show the revision timestamp in the post title.</li>
</ol>
By default the revision history is not shown on any posts or pages.
For control over where you place the revision history use the <code>rh_the_revision</code> function. 
It takes optional parameters, before and after. For example:
<pre><code><?php rh_the_revision('<h4>', '</h4>'); ?>
</code></pre>

Revision History

Revision History displays the revision history of a post or page, with links to the content of each revision.

Arefly

Post revisions are backups of articles editors are writing and forgot to hit save. They are also article versions stored in the WP database, as a way to see how the post’s content evolved.
While they are important for this later reason, sometimes WordPress creates post revisions with minimal changes to the post content. These are “redundant” post revisions and they do nothing more but slow down page loading time and bulk up the database with useless content.
This WordPress plugin can help webmasters delete these kind of redundant posts.
中文介紹請看<a href="http://www.arefly.com/delete-post-revision/" rel="nofollow ugc">這裏</a>
<h4>Translators</h4>
<ul>
<li>Chinese, Simplified (zh_CN) – <a href="http://www.arefly.com/" rel="nofollow ugc">Arefly</a></li>
<li>Chinese, Traditional (zh_TW) – <a href="http://www.arefly.com" rel="nofollow ugc">Arefly</a></li>
<li>English (en_US) – <a href="http://www.arefly.com" rel="nofollow ugc">Arefly</a></li>
</ul>
If you have created your own language pack, or have an update of an existing one, you can send <a href="https://codex.wordpress.org/Translating_WordPress" rel="nofollow ugc">gettext PO and MO files</a> to <a href="http://www.arefly.com/about/" rel="nofollow ugc">Arefly</a> so that I can bundle it into Delete Post Revision. You can download the latest <a href="https://plugins.svn.wordpress.org/delete-post-revision/trunk/lang/delete-post-revision.pot" rel="nofollow ugc">POT file</a>.

Delete Post Revision

Help you clean out redundant & repetitive post revisions and thin out the database.

Revision History vs Delete Post Revision