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, SQL Server , .
SQL Server , , , , . SQL Server , , . , Memory: Available Bytes 100...50 MB Windows (trimming) , , . Min Server Memory Max Server Memory.
SQL Server, SQL, SharePoint.
b6s SQL 2147483647 Mb, SQL Server â 96 GB.
Max Server Memory ( SQL Server) :
SQL = TotalPhyMem â ( NumOfSQLThreads * ThreadStackSize ) â (1GB * ( NumOfCores /4)) â RAMOSReserve d â RAMForOtherApps , :
- TotalPhyMem â .
- NumOfCores â - .
- NumOfSQLThreads â - , . - 4 NumOfSQLThreads 256. - 4 : NumOfSQLThreads = 256 + (NumOfCores- 4) * 8.
- ThreadStackSize = 2 x64. IA64 ThreadStackSize=4.
- RAMOSReserved â . 20% TotalPhyMem 15 12,5% .
- RAMForOtherApps â SQL- .
:
SELECT cpu_count AS [Logical CPU Count] , hyperthread_ratio AS [Hyperthread Ratio] , cpu_count / hyperthread_ratio AS [Physical CPU Count] , osi.physical_memory_kb / 1024 AS [Physical Memory (MB)] , sqlserver_start_time FROM sys.dm_os_sys_info as osi;
b6ã®å Žåãèšç®ã¯æ¬¡ã®ããã«ãªããŸãã
- TotalPhyMem = 98276 Mbã
- NumOfCores = 32ã
- NumOfSQLThreads = 256 +ïŒ 32-4 ïŒ* 8 = 480
- ThreadStackSize = 2 Mbã
- RAMOSReserve d = 12.5ïŒ * 98276 Mb = 11793 Mb
- RAMForOtherApps-顧客ã¯ãã®å€ãèªåã§æ±ºå®ããå¿ èŠããããŸãã çŸåšã®èšç®ã§ã¯ãSQLã®1ç§ã€ã³ã¹ã¿ã³ã¹ããã8,000 MBã®å€ãæ³å®ããŠããŸãã
SQLã®æ倧RAMãµã€ãº = 98276 Mb-ïŒ480 * 2 MbïŒ-ïŒ1GB * ROUNDDOWNïŒ32/4ïŒïŒ-11793 Mb-8000 Mb = 98276 Mb-960 Mb-8192 Mb-11793 Mb-8000 Mb = 69331 Mb
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