option_value of wp_options is too long
<p>I claim to the server provider that my site is running too slow. They said that it is because of the site development problem and they sent me a report which says that it takes more than 40 seconds to update wp_options table.
Here is one of those.</p>

<pre><code> 2. Executed 22h 11m 24s ago for 52.135218 sec on Database --&gt; p*****ip_db                                                                                                  
Date: 2016-03-19 00:08:20 Query_time: 52.135218 Rows_examined: 1: Rows_sent 0 Lock_time: 0.000359                                                                           
# Schema: pi****p_db  Last_errno: 0  Killed: 0 UPDATE `wp_options` SET `option_value` = 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</code></pre>

<p>it looks like option_values is very long. </p>

<p>And all the SQL like</p>

<pre><code>UPDATE `wp_options` SET `option_value` = 'a:19:{s:13:\"administrator\";a:2:{s:4:\"name\";s:13:\"Administrator\";s:12:\"capabilities\"
</code></pre>

<p>So it is all about <code>'a:19:{s:13:\"administrator</code></p>

<p>Could anybody please:</p>

<ol>
<li><p>explain why the option_values is too long? It is normal, or a bug?</p></li>
<li><p>If it is a bug, how to solve it?</p></li>
<li><p>Is it something related to admin account of wordpress site?</p></li>
</ol>