Inspecting Index Usage In MySQL, PostgreSQL, and MongoDB

02/08/19 In my recent post about the Left-Prefix Index Rule, I explained how queries can use all or part of a compound (multi-column) index. Knowing what makes an index fully usable by a query is important, but it’s also important to know how to figure ... The post Inspecting Index Usage In MySQL, PostgreSQL, and MongoDB appeared first on SolarWinds Blog.