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Andy S., The latest code is overloading mysql when we run 60 queries simultaneously (before it worked with over 100) the error is: SessOpen: [0x5be19400924 19:40:57.563 [0x7fa65218f700] ERROR qmeta.QMetaMysql (core/modules/qmeta/QMetaMysql.cc:414) - SQL query failed: UPDATE QInfo SET completed = NOW(), status = 'COMPLETED' WHERE queryId = 21 ] Opening xroot://10.158.37.100:1094//chk/LSST/700 0924 19:40:57.563 [0x7fa64116d700] ERROR qmeta.QMetaTransaction (core/modules/qmeta/QMetaTransaction.cc:62) - Failed to abort transaction: mysql error: (2006) MySQL server has gone away Unable to execute query: ROLLBACK 0924 19:40:57.564 [0x7fa64116d700] ERROR root (core/modules/ccontrol/userQueryProxy.cc:128) - Query ID is not registered in metadata: 29 [in function completeQuery at core/modules/qmeta/QMetaMysql.cc:420] ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the QSERV-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=QSERV-L&A=1