Articoli

Pinal Dave (blog | twitter) in questa serie di posts ci parla dei vari wait stats e queues.

Introduction to Wait Stats and Wait Types - Wait Type - Day 1 of 28

Signal Wait Time Introduction with Simple Example - Wait Type - Day 2 of 28

DMV - sys.dm_os_wait_stats Explanation - Wait Type - Day 3 of 28

Jason Strate (blog | twitter) in questa serie di posts ci porta nel mondo di SSIS, con esempi pratici e suggerimenti per sfuttarlo al meglio.

1. 31 Days of SSIS - Raw Files Are Awesome (1/31)
2. 31 Days of SSIS - Using Breakpoints (2/31)
3. 31 Days of SSIS - Data Flow Breakpoints?! (3/31)
4. 31 Days of SSIS - Folder Structures (4/31)
5. 31 Days of SSIS - One Variable to Rule Them All (5/31)
6. 31 Days of SSIS - Recursive SSIS Package (6/31)
7. 31 Days of SSIS - What The Sorts?! (7/31)
8. 31 Days of SSIS - Merge Join Is My Friend (8/31)
9. 31 Days of SSIS - Override Variables (9/31)
10. 31 Days of SSIS - Pivot Transformation (10/31)
11. 31 Days of SSIS - UnPivot Transformation (11/31)
12. 31 Days of SSIS - UnPivot Alternative (12/31)
13. 31 Days of SSIS - Create XML Document (13/31)
14. 31 Days of SSIS - Instant Excel Spreadsheet (14/31)
15. 31 Days of SSIS - Every Which Way Outputs (15/31)
16. 31 Days of SSIS - 10 Things About Expressions (16/31)
17. 31 Days of SSIS - Environmental Variable(17/31)
18. 31 Days of SSIS - SQL Server Configuration (18/31)
19. 31 Days of SSIS - DTSConfig Configuration (19/31)
20. 31 Days of SSIS - No More Procedures (20/31)
21. 31 Days of SSIS - Controlling Your Flow In The Control Flow (21/31)
22. 31 Days of SSIS - Data Flow Expressions (22/31)
23. 31 Days of SSIS - Generating Row Numbers (23/31)
24. 31 Days of SSIS - One Package, Unlimited Databases (24/31)
25. 31 Days of SSIS - One Package, Unlimited Tables (25/31)
26. 31 Days of SSIS - Small Package, Big Win (26/31)
27. 31 Days of SSIS - Adding Some Delta Force (27/31)
28. 31 Days of SSIS - Jim Croce and the Foreach (File) Loop Container (28/31)
29. 31 Days of SSIS - Exporting Execution Plans (29/31)
30. 31 Days of SSIS - Importing Execution Plans (30/31)
31. 31 Days of SSIS - SSIS Naming Conventions (31/31)

Glen Berry in questa serie di posts ci porta all’interno delle DMVs più utilizzate per monitorare SQL Server.

Day 1 sys.dm_os_buffer_descriptors Day 2 sys.dm_exec_sessions Day 3 sys.dm_os_sys_info Day 4 sys.dm_os_sys_memory Day 5 sys.dm_db_mirroring_auto_page_repair Day 6 sys.dm_db_index_usage_stats Day 7 sys.dm_db_missing_index_group_stats Day 8 sys.dm_fts_active_catalogs Day 9 sys.dm_os_schedulers Day 10 sys.dm_exec_procedure_stats Day 11 sys.dm_db_index_usage_stats Day 12 sys.dm_db_partition_stats Day 13 sys.dm_io_virtual_file_stats Day 14 sys.dm_os_wait_stats Day 15 sys.dm_os_performance_counters Day 16 sys.dm_exec_cached_plans Day 17 sys.dm_db_index_usage_stats Day 18 sys.dm_clr_tasks Day 19 sys.dm_os_wait_stats Day 20 sys.dm_exec_cached_plans Day 21 sys.dm_os_ring_buffers Day 22 sys.dm_exec_query_memory_grants Day 23 sys.dm_os_process_memory Day 24 sys.dm_exec_requests Day 25 sys.dm_os_memory_cache_counters Day 26 sys.dm_exec_procedure_stats Day 27 sys.dm_tran_locks Day 28 sys.dm_io_pending_io_requests Day 29 sys.dm_exec_connections Day 30 sys.dm_os_buffer_descriptors

Sebastian Maine (sqlity.net) in questa serie di posts ci mostra le varie tipologie di join presenti in SQL Server.

A SQL Server DBA Myth a day In questa serie di posts di Paul Randal vengono sfatati alcuni “miti” diffusi tra i DBA SQL Server.

(1/30) in-flight transactions continue after a failover (2/30) DBCC CHECKDB causes blocking (3/30) instant file initialization can be controlled from within SQL Server (4/30) DDL triggers are INSTEAD OF triggers (5/30) AWE must be enabled on 64-bit servers (6/30) three null bitmap myths (7/30) multiple mirrors and log shipping load delays (8/30) unicorns, rainbows, and online index operations (9/30) data file shrink does not affect performance (10/30) database mirroring detects failures immediately (11/30) database mirroring failover is instantaneous (12/30) tempdb should always have one data file per processor core (13/30) you cannot run DMVs when in the 80 compat mode (T-SQL Tuesday #005) (14/30) clearing the log zeroes out log records (15/30) checkpoint only writes pages from committed transactions (16/30) corruptions and repairs (17/30) page checksums (18/30) FILESTREAM storage, garbage collection, and more (19/30) TRUNCATE TABLE is non-logged (20/30) restarting a log backup chain requires a full database backup (21/30) corruption can be fixed by restarting SQL Server (22/30) resource governor allows IO governing (23/30) lock escalation (24/30) twenty six restore myths (25/30) fill factor (26/30) nested transactions are real (27/30) use BACKUP WITH CHECKSUM to replace DBCC CHECKDB (28/30) BULK_LOGGED recovery model (29/30) fixing heap fragmentation (30/30) backup myths

Ancora Glenn Berry nella sua serie di posts dedicati all’hardware: utile punto di partenza per chi sta per scegliere il server da acquistare per SQL Server. La serie è del 2011, ma molti posts sono ancora attuali. Per chi necessita di informazioni ancora più recenti, vi rimando al blog di Glenn.

In questa serie di posts di Jonathan Kehayias si parla di come utilizzare gli Extended Events per monitorare SQL Server.

(1 of 31) - An Overview of Extended Events (2 of 31) - Querying the Extended Events Metadata (3 of 31) - Managing Event Sessions (4 of 31) - Querying the Session Definition and Active Session DMV’s (5 of 31) - Targets Week - ring_buffer (6 of 31) - Targets Week - asynchronous_file_target (7 of 31) - Targets Week - bucketizers (8 of 31) - Targets Week - synchronous_event_counter (9 of 31) - Targets Week - pair_matching (10 of 31) - Targets Week - etw_classic_sync_target (11 of 31) - Targets Week - Using multiple targets to simplify analysis (12 of 31) - Using the Extended Events SSMS Addin (13 of 31) - The system_health Session (14 of 31) - A Closer Look at Predicates (15 of 31) - Tracking Ghost Cleanup (16 of 31) - How Many Checkpoints are Issued During a Full Backup? (17 of 31) - A Look at Backup Internals and How to Track Backup and Restore Throughput (Part 1) (18 of 31) - A Look at Backup Internals and How to Track Backup and Restore Throughput (Part 2) (19 of 31) - Using Customizable Fields (20 of 31) - Mapping Extended Events to SQL Trace (21 of 31) - The Future - Tracking Blocking in Denali (22 of 31) - The Future - fn_dblog() No More? Tracking Transaction Log Activity in Denali (23 of 31) - How it Works - Multiple Transaction Log Files (24 of 31) - What is the package0.callstack Action? (25 of 31) - The Twelve Days of Christmas (26 of 31) - Configuring Session Options (27 of 31) - The Future - Tracking Page Splits in SQL Server Denali CTP1 (28 of 31) - Tracking Page Compression Operations (29 of 31) - The Future - Looking at Database Startup in Denali (30 of 31) - Tracking Session and Statement Level Waits (31 of 31) - Event Session DDL Events