02 July 2012

Table size (MB)

by SQL Monitor Team

42,414 0 Storage

This metric is useful if you want to know exactly how much physical space a particular table is taking up, including the size of its indexes.

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If you are using Redgate’s SQL Server monitoring tool, Redgate Monitor, you can instantly install and run this metric on your servers.

This metric is useful if you want to know exactly how much physical space a particular table is taking up, including the size of its indexes. If a database is growing quickly within a short time and you suspect a certain table is responsible, you can monitor its actual size, or the rate at which it is increasing.

If you have a particularly large table affecting performance, you may consider:

Carrying out index maintenance – see http://www.mssqltips.com/sqlservertip/1339/sql-server-index-maintenance-checklist/
Data partitioning – see http://www.mssqltips.com/sqlservertip/1200/handling-large-sql-server-tables-with-data-partitioning/

Metric definition

Name

Table size (MB)

Description

The size in Megabytes of a specific table.

The T-SQL query that will collect data


		
			
			
Transact-SQL
			
			-- Replace 'dbo.MyTable' with the name of the table you want to measure.
 
DECLARE @SpaceUsed TABLE
  (
   [name] NVARCHAR(128),
   [rows] CHAR(11),
   [reserved] VARCHAR(18),
   [data] VARCHAR(18),
   [index_size] VARCHAR(18),
   [unused] VARCHAR(18)
  );
 
INSERT INTO @SpaceUsed
    EXEC sp_spaceused 'dbo.MyTable';
 
SELECT (CAST(LEFT(data, LEN(data) - 3) AS BIGINT)
    + CAST(LEFT(index_size, LEN(index_size) - 3) AS BIGINT)) / 1024.00
  FROM @SpaceUsed;
			
				
					
				
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						-- Replace 'dbo.MyTable' with the name of the table you want to measure.
 
DECLARE @SpaceUsed TABLE
  (
   [name] NVARCHAR(128),
   [rows] CHAR(11),
   [reserved] VARCHAR(18),
   [data] VARCHAR(18),
   [index_size] VARCHAR(18),
   [unused] VARCHAR(18)
  );
 
INSERT INTO @SpaceUsed
    EXEC sp_spaceused 'dbo.MyTable';
 
SELECT (CAST(LEFT(data, LEN(data) - 3) AS BIGINT)
    + CAST(LEFT(index_size, LEN(index_size) - 3) AS BIGINT)) / 1024.00
  FROM @SpaceUsed;

Instances to collect from

the instance that contains the database you’re interested in

Databases to collect from

the database that contains the table you’re interested in

Collection frequency

3600

Use collected or calculated values

Leave the Use a calculated rate of change between collections check box unchecked

Metric collection

Enabled

Alert definition

Alert name

Table size

Description

Raised when the size of a table exceeds a specified threshold.

Raise an alert when the metric value goes

above the defined threshholds

Default threshold values

High:	2000
Medium:	1000
Low:	10

Note: These thresholds are intended as guideline values. If they seem too high or too low for your environment, replace them with values more suited to your server performance.

Raise an alert when the threshold is passed for

1 collection

Alert is

Enabled

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Table size (MB)

Metric definition

Name

Description

The T-SQL query that will collect data

Instances to collect from

Databases to collect from

Collection frequency

Use collected or calculated values

Metric collection

Alert definition

Alert name

Description

Raise an alert when the metric value goes

Default threshold values

Raise an alert when the threshold is passed for

Alert is

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