Logical Reads vs. Physical Reads
If you’ve spent time tuning SQL Server queries, you may have seen these two numbers side by side: logical reads and physical reads. Maybe you have seen one or the other be some absurdly high number and didn’t think much of it. But in reality they could be eye openers on behind the scenes query performance. The quick version Logical reads are pages a query can pull from the data cache — recently accessed pages stored in memory. Physical reads …