<?php
$db = new mysqli('db1053.eqiad.wmnet', 'root', '');
$db->query('SELECT sleep(100)');
?>
[Thu Nov 26 13:14:40 2015] [hphp] [9015:7f5ee93b2d00:0:000001] [] SlowTimer [59996ms] at runtime/ext_mysql: slow query: SELECT sleep(100)

hashar@terbium:~$ mwscript sql.php --wiki=aawiki
> SELECT sleep(100);

[Thu Nov 26 12:22:16 2015] [hphp] [32400:7fa1daecdd00:0:000001] [] SlowTimer [59999ms] at runtime/ext_mysql: slow query: SELECT /* DatabaseBase::query  */ sleep(100)
# Wait some more...
[Thu Nov 26 12:23:16 2015] [hphp] [32400:7fa1daecdd00:0:000002] [] SlowTimer [59999ms] at runtime/ext_mysql: slow query: SELECT /* DatabaseBase::query  */ sleep(100)
exception 'DBQueryError' with message 'A connection error occured. 
Query: SELECT sleep(100)
Function: DatabaseBase::query
Error: 2013 Lost connection to MySQL server during query (10.64.16.27)
' in /srv/mediawiki/php-1.27.0-wmf.7/includes/db/Database.php:1090
Stack trace:
#0 /srv/mediawiki/php-1.27.0-wmf.7/includes/db/Database.php(1047): DatabaseBase->reportQueryError()
#1 /srv/mediawiki/php-1.27.0-wmf.7/maintenance/sql.php(143): DatabaseBase->query()
#2 /srv/mediawiki/php-1.27.0-wmf.7/maintenance/sql.php(134): MwSql->sqlDoQuery()
#3 /srv/mediawiki/php-1.27.0-wmf.7/maintenance/doMaintenance.php(103): MwSql->execute()
#4 /srv/mediawiki/php-1.27.0-wmf.7/maintenance/sql.php(178): include()
#5 /srv/mediawiki/multiversion/MWScript.php(97): include()
#6 {main}
>