WebA logical read occurs every time the database engine requests a page from the buffer cache. If the page is not currently in the buffer cache, a physical read is then performed to read … WebAll reads are logical reads. Some also incur physical reads and read ahead reads in addition to bring pages into cache. Presumably it read ahead a few pages that were never actually required by your query hence the fact that this number is slightly larger than the actual logical reads. Share Improve this answer Follow answered Apr 19, 2011 at 21:13

Logical Read vs Physical Read – SQLServerCentral Forums

WebSQL Server implements a Buffer Cache to improve performance of Read and Write requests from SQL statements. All records that have been selected, updated, deleted or inserted will have passed through the buffer cache as memory is much faster to read from and write to than physical disks. WebApr 7, 2024 · Table 'fact_order_BIG_CCI'. Scan count 1, logical reads 0, physical reads 0, page server reads 0, read-ahead reads 0, page server read-ahead reads 0, lob logical reads 388, lob physical reads 0, lob page server reads 0, lob read-ahead reads 836, lob page server read-ahead reads 0. Table 'fact_order_BIG_CCI'. Segment reads 1, segment skipped 6. burhave nordsee webcam

Monitoring Logical and Physical Reads & Buffer Cache Usage - PTR

WebMay 16, 2024 · One thing that will separate servers where queries do a lot of logical reads from servers that do a lot of physical reads is wait stats. Servers where queries do a lot of … WebApr 14, 2024 · 5 min read. Save. SQL vs. Embedding: A Simple Guide to Choosing the Right Data Analysis Techniques. ... SQL is a language used to work with databases that store data in a neat, organized way ... WebNov 12, 2024 · A logical read occurs every time the Database Engine requests a page from the buffer cache. If the page is not currently in the buffer cache, a physical read first … burhave wandern