Abstract:During the evolution of a database schema, some schema-changing operations (e.g., the “ALTER TABLE” command) require the underlying database management system to lock tables until the opera-tion is finished. We call these schema-changing operations blocking operations. During the execution of blocking operations, a soft-ware application may behave abnormally, varying from a slow page loading to an error caused by a web request taking too long to return. Despite their potential negative impact on important qual… Show more
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