Email was sent:
<pre>
MySQL generated an error.This user is not logged in.Apache environment:
    SCRIPT_URI = http://chess.eecs.berkeley.edu/pubs/search/
    HTTP_REFERER = 
    REMOTE_HOST = 
    HTTP_GET_VARS:
        year = 2010
        Action = Search

The error message is:
Cannot connect to MySQL server.Stacktrace:
  at sqli_error(/home/www/php/include/sqli.inc.php:203)
  at sqli_connection_error(/home/www/php/include/sqli.inc.php:64)
  at sqli_select_row(/home/www/php/include/sqli.inc.php:864)
  at pub_get(/home/www/php/include/pub.inc.php:913)
  at pub_search(/home/www/php/include/pub.inc.php:1814)
  at require(/home/www/php/pubs/pubs.php:967)
  at include(/home/www/php/chess.eecs.berkeley.edu/pubs.php:9)
  at include(/home/www/php/chess.eecs.berkeley.edu/get.php:121)
  at /home/www/php/get.php:40

</pre>

<code>/export/home1/tmp/php.err</code> contained
<pre>
01-Aug-2015 01:08:53] PHP Warning:  mysqli::mysqli(): (HY000/1040): Too many connections in /home/www/php/include/sqli.inc.php on line 436
[01-Aug-2015 01:08:53] PHP Warning:  mysqli_connect(): (HY000/1040): Too many connections in /home/www/php/include/sqli.inc.php on line 860
[01-Aug-2015 01:08:53] PHP Warning:  mysqli_connect(): (HY000/1040): Too many connections in /home/www/php/include/sqli.inc.php on line 285
[01-Aug-2015 01:08:53] PHP Warning:  mysqli_connect(): (HY000/1040): Too many connections in /home/www/php/include/sqli.inc.php on line 860
[01-Aug-2015 01:08:53]  [client 188.143.232.37] sqli.inc.php: sqli_prepared_select_row(): Failed to connect to database chess_2 on localhost as dbreader: Too many connections
</pre>

<p>
<a href="https://dev.mysql.com/doc/refman/5.5/en/too-many-connections.html">https://dev.mysql.com/doc/refman/5.5/en/too-many-connections.html</a> suggests setting <code>max_connections</code></p>

<p>As root, I edited
<code>/etc/my.cnf</code>:</p>

<pre>
[mysqld]
set-variable=max_connections=250
</pre>
<p>And then restarted the server:<code>/etc/init.d/gsrc stop</code> and then <code>/etc/init.d/gsrc start</code>