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SQL SERVER – Denali – DMV – sys.dm_os_volume_stats – Information about operating system volume

September 30, 2011
Pinal Dave
SQL Tips and Tricks
SQL DMV

The new Denali DMV sys.dm_os_volume_stats shows the operating system volume where each database file is stored, with its total and available space.

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Reading the Transaction Log With fn_dblog

September 29, 2011
Pinal Dave
SQL Tips and Tricks
SQL Audit, SQL Backup and Restore, SQL Server, Transaction Log, Undocumented SQL

fn_dblog can expose transaction-log records during a narrow investigation, but retention and missing user context make it a last resort.

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Execution_count result.

SQL SERVER – Denali – DMV Enhancement – sys.dm_exec_query_stats – New Columns

September 28, 2011
Pinal Dave
SQL Tips and Tricks
SQL DMV, SQL Scripts

SQL Server Denali adds four new columns to sys.dm_exec_query_stats, like total_rows and last_rows, so you can see how many rows your queries returned.

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Stop Chasing Every Seek: When a Table Scan Is the Right Plan

September 28, 2011
Pinal Dave
SQL Tips and Tricks
SQL Performance, SQL Scripts, SQL Server

A Clustered Index Scan is not always the problem. Count the reads for a seek with lookups, a scan and the optimizer’s own pick, then see when the seek really wins.

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A Shared SEQUENCE for Invoices and Credit Notes in One Range

September 27, 2011
Pinal Dave
SQL Tips and Tricks
Database, SQL Scripts, SQL Server

One sequence, two tables, and an auditor asking about number 8. See where gaps come from, how duplicates sneak in, and where uniqueness should live.

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Indexed Views: When the Faster Reads Are Worth It

September 26, 2011
Pinal Dave
SQL Performance
SQL Index, SQL Performance, SQL Server, SQL View

Evaluate indexed views by building a sales summary, comparing read savings with write maintenance, and using NOEXPAND where required.

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Configure sql server startup parameters.

SQL SERVER – Denali – Startup Parameters Easy to Configure

September 26, 2011
Pinal Dave
SQL Tips and Tricks
SQL Server Management Studio

SQL Server Denali makes startup parameters easy to change. Here is the quick path in SQL Server Configuration Manager to the startup parameters screen.

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