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Mysql – Order by with and without Limit clause uses different index

Can someone explain why the optimizer chooses different indexes if Limit is used? MariaDB > EXPLAIN SELECT dms_meta.docid FROM dms_meta WHERE (dms_meta.metid = 3 and dms_meta.value = '2015-10-01') ORDER BY dms_meta.docid ASC limit 25; +------+-------------+----------+-------+---------------+------------+---------+------+------+-------------+ | id | select_type |…

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Mysql – artifactory upgrade from 7.19.4 to 7.77.5

[ steps ] stop artifactory stop mysql Upgrade Ubuntu 14.04 to 16.07 Upgrade mysql-server to 5.7 Downloaded 7.75.5.tar.gz file put it into /opt/jfrog/artifactory untared 7.77.5.tar.gz removed /opt/jfrog/artifactory/app cp -r /opt/jfrog/artifactory/7.77.5/app/* /opt/jfrog/artifactory/app started up mysql-server started artifactory. Looking at console.log got…

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