max number of instances?

SQL Server 2005 SP2

Are there any guidelines/rules of thumb as to the max number
of SQL Server instances on a single 64-bit server?

thanks

aj

Nov 5 '07 #1

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6024

Erland Sommarskog

aj (ro****@mcdonalds.com) writes:

SQL Server 2005 SP2

Are there any guidelines/rules of thumb as to the max number
of SQL Server instances on a single 64-bit server?

This page in Books Online
ms-help://MS.SQLCC.v9/MS.SQLSVR.v9.en/instsql9/html/13e95046-0e76-4604-b561-d1a74dd824d7.htm
says 50 instances per server, except for failover cluster where the
number is 25.

Given that instances will compete about memory of each, I would not really
consider putting 50 instances on the same box, unless it has lotttttts of
memory, say 64 GB, and each instance has modest requirements, so that I
could set the max server memory for each instance to 1GB or so.

--
Erland Sommarskog, SQL Server MVP, es****@sommarskog.se

Books Online for SQL Server 2005 at
http://www.microsoft.com/technet/pro...ads/books.mspx
Books Online for SQL Server 2000 at
http://www.microsoft.com/sql/prodinf...ons/books.mspx

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