Monitoring

Technical Article

Trace-scrubbing Tools

  • Article

Andrew Zanevsky shares his trace-scrubbing procedures that make it easy for you to handle large trace files and aggregate transactions by type–even when captured T-SQL code has variations.

SQL Server Profiler is a veritable treasure trove when it comes to helping DBAs optimize their T-SQL code. But, the surfeit of riches (I'm reminded of the Arabian Nights tale of Aladdin) can be overwhelming. I recently had one of those "sinking" feelings when I first tried to make sense of the enormous amount of data collected by traces on a client's servers. At this particular client, the online transactions processing system executes more than 4 million database transactions per hour. That means that even a 30-minute trace that captures "SQL Batch Completed" events results in a table with 2 million rows. Of course, it's simply impractical to process so many records without some automation, and even selecting the longest or most expensive transactions doesn't necessarily help in identifying bottlenecks. After all, short transactions can be the culprits of poor performance when executed thousands of times per minute.

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2005-01-11

2,003 reads

SQLServerCentral Article

Monitoring Drive and Database Free Space

  • Article

SQL Server will autogrow your databases as they run out of space. But the process doesn't manage space, nor does it check the free space on the drive. Allowing autogrow to grow unchecked and unmanaged will eventually use up all the free disk space and potentially crash your server. New author Mark Nash brings you his system for monitoring space usage and generating a report that eases this process.

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2006-08-25 (first published: )

45,105 reads

Technical Article

SQLCentric

  • Article

This is an update to v1.2 of the product which does monitoring of your SQL servers. Looks like it checks service status, jobs, disk space, some other things. (Not Reviewed)

2003-08-01

1,425 reads

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Question of the Day

ORDER BY alias

There is a table tmp_tab:

CREATE TABLE tmp_tab (
id int,
val int
);
INSERT INTO tmp_tab VALUES
(1, 1),
(2, NULL),
(3, 3),
(4, 4),
(5, 5);
You want to order the rows ids by the following expression:
    ISNULL(val, id) + 1
Which of the following queries produces the expected ordering and why? (Select all correct)

See possible answers