Re: SparkSQL: First query execution is always slower than subsequent queries

Hi, Lloyd, Both runs are cold/warm? Memory/cache hit/miss could be a big factor if your application is IO intensive. You need to monitor your system to understand what is your bottleneck. Good lucks, Xiao Li

Re: SparkSQL: First query execution is always slower than subsequent queries

-dev +user 1). Is that the reason why it's always slow in the first run? Or are there > any other reasons? Apparently it loads data to memory every time so it > shouldn't be something to do with disk read should it? > You are probably seeing the effect of the JVMs JIT. The first run is