You just opened the door for a DoS attack.
Take a look at the LimitRequestFieldSize directive in the Apache documentation :
Quote from this source:
, HTTP-.
LimitRequestFieldSize HTTP-. , , . , , . SPNEGO 12392 .
, " ".
, ( ) ( ).
, , . , Linux ( ):
httpd.conf /etc/httpd/conf/httpd.conf(RHEL, CentOS, Fedora, Scientific Linux).
Debian , Ubuntu ( , , ), - apache2.conf, /etc/apache2/apache2. .
, .
, : Unix Linux Q & A , StackExchange, ( , Linux * Nix OS). , .