MSDN describes the various logical / physical read and write columns in dm_exec_query_stats as:
Number of physical reads performed the last time the plan was executed.
Those columns are all 64 bit ints (
bigint), so obviously larger numbers represent more reads / writes.
But what are the units of this column? Database pages? Kilobytes? Just an arbitrary number?
Example: for a reasonably expensive query in my database
dm_exec_query_stats.total_logical_reads = 40412.
40412 of what?