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SQL Server 2012
Home > SQL Server 2012 > SQL Server 2012 Maximum Capacity Specifications (32-bit Server)
SQL Server 2012 Maximum Capacity Specifications (32-bit Server)

SQL Server 2012 Maximum Capacity Specifications (32-bit Server)

The following tables specify the maximum sizes and numbers of various objects defined in SQL Server 2012 components, and compared against the maximum sizes and number of various objects defined in SQL Server 2008 and SQL Server 2008 R2 components.

Database Engine Objects

The following table specifies the maximum sizes and number of various objects defined in SQL Server databases or referenced in Transact-SQL statements.

Maximum Sizes / Numbers SQL Server (32-bit)
SQL Server Database Engine Object SQL Server 2008 SQL Server 2008 R2 SQL Server 2012
Batch size 65,536 * Network Packet Size 65,536 * Network Packet Size 65,536 * Network Packet Size
Bytes per short string column 8,000 8,000 8,000
Bytes per GROUP BY ORDER BY 8,060 8,060 8,060
Bytes per index key 900 900 900
Bytes per foreign key 900 900 900
Bytes per primary key 900 900 900
Bytes per row 8,060 8,060 8,060
Bytes in source text of a stored procedure. Lesser of batch size or 250 MB Lesser of batch size or 250 MB Lesser of batch size or 250 MB
Bytes per VARCHAR(MAX), VARBINARY(MAX), XML, TEXT, or IMAGE column 2^31-1 2^31-1 2^31-1
Characters per NTEXT or NVARCHAR(MAX) column 2^30-1 2^30-1 2^30-1
Clustered indexes per table 1 1 1
Columns in GROUP BY, ORDER BY Limited only by number of bytes Limited only by number of bytes Limited only by number of bytes
Columns or expressions in a GROUP BY WITH CUBE or WITH ROLLUP statement 10 10 10
Columns per index key 16 16 16
Columns per foreign key 16 16 16
Columns per primary key 16 16 16
Columns per nonwide table 1,024 1,024 1,024
Columns per wide table 30,000 30,000 30,000
Columns per SELECT statement 4,096 4,096 4,096
Columns per INSERT statement 4,096 4,096 4,096
Connections per client Maximum value of configured connections Maximum value of configured connections Maximum value of configured connections
Database size 524,272 terabytes 524,272 terabytes 524,272 terabytes
Databases per instance of SQL Server 32,767 32,767 32,767
Filegroups per database 32,767 32,767 32,767
Files per database 32,767 32,767 32,767
File size (data) 16 terabytes 16 terabytes 16 terabytes
File size (log) 2 terabytes 2 terabytes 2 terabytes
Foreign key table references per table 253 253 253
Identifier length (in characters) 128 128 128
Instances per computer 50 instances on a stand-alone server for all SQL Server editions. 50 instances on a stand-alone server for all SQL Server editions. 50 instances on a stand-alone server for all SQL Server editions.
Length of a string containing SQL statements (batch size) 65,536 * Network packet size 65,536 * Network packet size 65,536 * Network packet size
Locks per connection Maximum locks per server Maximum locks per server Maximum locks per server
Locks per instance of SQL Server Up to 2,147,483,647 Up to 2,147,483,647 Up to 2,147,483,647
Nested stored procedure levels 32 32 32
Nested subqueries 32 32 32
Nested trigger levels 32 32 32
Nonclustered indexes per table 999 999 999
Number of distinct expressions in the GROUP BY clause when any of the following are present: CUBE, ROLLUP, GROUPING SETS, WITH CUBE, WITH ROLLUP 32 32 32
Number of grouping sets generated by operators in the GROUP BY clause 4,096 4,096 4,096
Parameters per stored procedure 2,100 2,100 2,100
Parameters per user-defined function 2,100 2,100 2,100
REFERENCES per table 253 253 253
Rows per table Limited by available storage Limited by available storage Limited by available storage
Tables per database Limited by number of objects in a database Limited by number of objects in a database Limited by number of objects in a database
Partitions per partitioned table or index 1,000 1,000 15,000
Statistics on non-indexed columns 30,000 30,000 30,000
Tables per SELECT statement Limited only by available resources Limited only by available resources Limited only by available resources
Triggers per table Limited by number of objects in a database. Limited by number of objects in a database. Limited by number of objects in a database.
Columns per UPDATE statement (Wide Tables) 4,096 4,096 4,096
User connections 32,767 32,767 32,767
XML Indexes 249 249 249

SQL Server Utility Objects

The following table specifies the maximum sizes and number of various objects that were tested in the SQL Server Utility.

Maximum Sizes / Numbers SQL Server (32-bit)
SQL Server Utility Object SQL Server 2008 SQL Server 2008 R2 SQL Server 2012
Computers (physical computers or virtual machines) per SQL Server Utility 100 100 100
Instances of SQL Server per computer 5 5 5
Total number of instances of SQL Server per SQL Server Utility 200 200 200
User databases per instance of SQL Server, including data-tier applications 50 50 50
Total number of user databases per SQL Server Utility 1,000 1,000 1,000
File groups per database 1 1 1
Data files per file group 1 1 1
Log files per database 1 1 1
Volumes per computer 3 3 3

SQL Server Data-Tier Application Objects

The following table specifies the maximum sizes and number of various objects that were tested in the SQL Server data-tier applications (DAC).

Maximum Sizes / Numbers SQL Server (32-bit)
SQL Server DAC Object SQL Server 2008 SQL Server 2008 R2 SQL Server 2012
Databases per DAC 1 1 1
Objects per DAC Limited by the number of objects in a database, or available memory. Limited by the number of objects in a database, or available memory. Limited by the number of objects in a database, or available memory.

SQL Server Replication Objects

The following table specifies the maximum sizes and number of various objects defined in SQL Server Replication.

Maximum Sizes / Numbers SQL Server (32-bit)
SQL Server Replication Object SQL Server 2008 SQL Server 2008 R2 SQL Server 2012
Articles (merge publication) 256 256 256
Articles (snapshot or transactional publication) 32,767 32,767 32,767
Columns in a table (merge publication) 246 246 246
Columns in a table (SQL Server snapshot or transactional publication) 1,000 1,000 1,000
Columns in a table (Oracle snapshot or transactional publication) 995 995 995
Bytes for a column used in a row filter (merge publication) 1,024 1,024 1,024
Bytes for a column used in a row filter (snapshot or transactional publication) 8,000 8,000 8,000
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