what is this Error

[ahmad]

Hello,
this Error is Database error in vBulletin 5.5.3:

Invalid SQL:
/** saveDbCache */ SELECT * FROM cacheevent WHERE cacheid IN ('node_1911_lvl1data');

MySQL Error : MySQL server has gone away
Error Number : 2006
Request Date : Sunday, July 28th 2019 @ 04:40:17 PM
Error Date : Sunday, July 28th 2019 @ 04:45:18 PM
Script : http://www.accesswordkingdome.com/fo.../fetch?id=1911
Referrer :
IP Address : 93.158.161.90
Username : Guest
Classname : vB_Database_MySQLi
MySQL Version :


Stack Trace:
#0 vB_Database->getErrorData() called in [path]/vb/database.php on line 1207
#1 vB_Database->halt() called in [path]/vb/database/mysqli.php on line 249
#2 vB_Database_MySQLi->execute_query() called in [path]/vb/database.php on line 576
#3 vB_Database->query_read() called in [path]/vb/db/mysql/querydefs.php on line 7091
#4 vB_dB_MYSQL_QueryDefs->saveDbCache() called in [path]/vb/db/query/method.php on line 175
#5 vB_dB_Query_Method->execSQL() called in [path]/vb/db/assertor.php on line 301
#6 vB_dB_Assertor->assertQuery() called in [path]/vb/cache/db.php on line 387
#7 vB_Cache_Db->shutdown() called in [path]/vb/vb.php on line 478
#8 vB::shutdown() called in on line

[In Omnibus]

It looks like your server ran out of memory but you'd be better off asking your hosting provider.

[ahmad]

thank you In Omnibus

[Wayne Luke]

You can delete your System Cache in the AdminCP under Maintenance. It may help temporarily. When using vBulletin, you should allocate 128 MB to PHP scripts in the php.ini file. If your site is large (millions of nodes), then you may need to allocate more.