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  • Blog Post: Q & A: I can't make SQL Server 2005 32 bit version to use all memory on the machine

    I’m currently using the RTM+SP1 x86-SQL2005 build on a server which has 32GB of physical memory. I notice that during ramp-up the memory usage (as seen under task manager) increases to about 28GB (i.e. “Available memory” reduces to 4GB) and stays there. Is there a way to get around this and...
  • Blog Post: Q and A: Enabling AWE settings for SQL Server 32 bit edition in WOW

    Q. A customer wants to run SQL 2000 SP4 in a Windows Server 2003 SP1 x64 edition. They did the installation without problems but SQL Server is not using more than 4GB of memory. Is it possible to enable AWE in this configuration? A. The answer is yes, you should follow exactly the same procedure as...
  • Blog Post: Q and A: Some questions about output from dbcc memorystatus

    Recently I have recieved following question: A customer of mine is getting this output on an Itanium with 16GB of memory: Memory Manager KB ------------------------------ -------------------- VM Reserved 16979888 VM Committed 217928 AWE Allocated 14116272 Reserved Memory 1024 Reserved...
  • Blog Post: Q and A: SQL Server memory allocated outside of Buffer Pool, formerly known as MemToLeave

    Q. Under SQL Server 2000 Is the memtoleave concept still valid under 64-bit? A. Yes. If SQL Server’s component requests memory larger than 8 KB block, the block will be allocated outside of Buffer Pool. Remember, inside of SQL Server, Buffer Pool is preferable memory manager for dynamic allocations...
  • Blog Post: Q and A: Do I need to run "sp_configure 'awe enabled', 1" to make 64 bit version of SQL Server use locked pages?

    The answer is No. The source of possible confusion came from one of my previous posts: http://blogs.msdn.com/slavao/archive/2005/11/15/493019.aspx . I apologize for the confusion. In order to make 64 bit version of SQL Server leverage locked pages all you need to do is to give lock pages in memory privilege...
  • Blog Post: Q and A: Virtual Address Space, VAS, reservation - why bother?

    Seems like today is a question day :-). I will attempt to answer several questions about VAS I got today: Q1. There is one aspect of Virtual Memory that is just not clear yet. I think I understand about VAS, but maybe not as much as I could, but I don’t understand about ‘reserving memory’. When...
  • Blog Post: Q and A: x64 & AWE mechanism

    Today I received following question: Hello, We will be running Windows Server 2003 x64 with SQL Server 2005 x64. I would think AWE would not come into the picture in this scenario. I'm trying to find out more about SQL Server 2005 memory management on x64 systems using x64 versions of the OS...
  • Blog Post: Q and A: Using Lock Pages In memory on 64 bit platform

    Q: Hello Slava, I would like to confirm my understanding that on SQL 2005 64 bit edition it is recommended to grant Lock Pages in Memory right to the SQL account and then turn on the AWE setting. Thanks A: Yes, we do recommend to turn on Lock pages in memory so that OS doesn't page SQL Server out...
  • Blog Post: Q and A: Controlling size of a single cache in SQL 2005

    Q: I have teaching a class on Yukon for the Ascend program, and the class had a question I wanted to double check before answering. On an Itanium with 1 TB of RAM, the class’ curiosity asked, “If plan cache is very large “Then how does Plan Cache lookups work such that the plan lookup does not itself...
  • Blog Post: Q and A: Max memory with sql server 2000 / win2003 x64

    Today, I received following question Q: Slava, I have a question for you. Sql 2000 is documented to support a maximum of 64GB when used with 2000 datacenter edition. I assume this is the limit of 2000 Datacenter, but is it also a limit defined in sql server 2000? We are purchasing a new server which...
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