Fatal error: Uncaught RedisException: OOM command not allowed when used memory > 'maxmemory'. in /usr/local/lsws/www/moodle/cache/stores/redis/lib.php:497 Stack trace: #0 /usr/local/lsws/www/moodle/cache/stores/redis/lib.php(497): Redis->hSet('d7dbf14ad7624c3...', 'cc16192833c39fa...', 'Ngo\xE1\xBA\xA1i l\xE1\xBB\x87 - ...') #1 /usr/local/lsws/www/moodle/cache/classes/cache.php(893): cachestore_redis->set('cc16192833c39fa...', 'Ngo\xE1\xBA\xA1i l\xE1\xBB\x87 - ...') #2 /usr/local/lsws/www/moodle/cache/classes/application_cache.php(269): core_cache\cache->set_implementation('|2025041401.09|...', -1, 'Ngo\xE1\xBA\xA1i l\xE1\xBB\x87 - ...', true) #3 /usr/local/lsws/www/moodle/cache/classes/cache.php(816): core_cache\application_cache->set_implementation('|2025041401.09|...', -1, 'Ngo\xE1\xBA\xA1i l\xE1\xBB\x87 - ...') #4 /usr/local/lsws/www/moodle/lib/weblib.php(1191): core_cache\cache->set('|2025041401.09|...', 'Ngo\xE1\xBA\xA1i l\xE1\xBB\x87 - ...') #5 /usr/local/lsws/www/moodle/lib/weblib.php(965): purify_html('Ngo\xE1\xBA\xA1i l\xE1\xBB\x87 - ...', Array) #6 /usr/local/lsws/www/moodle/lib/setuplib.php(344): clean_text('Ngo\xE1\xBA\xA1i l\xE1\xBB\x87 - ...') #7 /usr/local/lsws/www/moodle/lib/setuplib.php(147): get_exception_info(Object(RedisException)) #8 [internal function]: default_exception_handler(Object(RedisException)) #9 {main} thrown in /usr/local/lsws/www/moodle/cache/stores/redis/lib.php on line 497