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Displaying posts with tag: Hash BTree Index (reset)

vBulletin session table and Hash index in MEMORY Engine
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In vBulletin Board System there is session table contains online user information and tracking, in which forum now, what the current URL now, So it is have huge concurrent update statement, By default this table is MEMORY engine because its data not important in case MySQL restart. I notice early loaded in MySQL and server, So I do full tuning for the server then analyze slow query using
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