Uncaught exception thrown in session handler.

PDOException: SQLSTATE[HY000]: General error: 1114 The table 'sessions' is full: INSERT INTO {sessions} (sid, ssid, uid, cache, hostname, session, timestamp) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4, :db_insert_placeholder_5, :db_insert_placeholder_6); Array ( [:db_insert_placeholder_0] => 2t0zC4A1L2T0_GowT6c1O7YoFIxLyBxTQDRwFnhcXio [:db_insert_placeholder_1] => 2t0zC4A1L2T0_GowT6c1O7YoFIxLyBxTQDRwFnhcXio [:db_insert_placeholder_2] => 0 [:db_insert_placeholder_3] => 0 [:db_insert_placeholder_4] => 18.221.53.209 [:db_insert_placeholder_5] => messages|a:1:{s:5:"error";a:1:{i:0;s:262:"<em class="placeholder">Warning</em>: mkdir(): No space left on device in <em class="placeholder">boost_mkdir()</em> (line <em class="placeholder">1407</em> of <em class="placeholder">/var/www/infoscope.biz/public_html/sites/all/modules/boost/boost.module</em>).";}} [:db_insert_placeholder_6] => 1714168195 ) in _drupal_session_write() (line 212 of /var/www/infoscope.biz/public_html/includes/session.inc).