Home > Articoli > Daily Series: A SQL Server DBA Myth a day

Daily Series: A SQL Server DBA Myth a day

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
(28/30) BULK_LOGGED recovery model
(29/30) fixing heap fragmentation
(30/30) backup myths

Per i più pigri Sorriso Paul ha condensato la serie in questo pdf.

Chi è Davide Mauri

Microsoft Data Platform MVP dal 2007, Davide Mauri si occupa di Data Architecture e Big Data nel mondo dell'IoT. Attualmente ricopre il ruolo di "Director Software Development & Cloud Infrastructure" in Sensoria, societa specializzata nella creazione di Wearables e sensori per l'IoT applicati a tessuti ed oggetti sportivi.

Leggi Anche

Automazione delle attività di manutenzione in Azure SQL Database (2 Parte)

Introduzione Nell’articolo Automazione delle attività di manutenzione in Azure SQL Database abbiamo descritto le attività …