I think it is feasible to force both services' hands by having a scheduled task or service that:
(a) before SQL Server's nightly processing, shuts down the SSAS service, and increases the memory allotted to SQL Server
(b) after SQL Server has done its processing, reduces max server memory and restarts SQL Server
(c) starts SSAS
This assumes that SSAS isn't required to be online while SQL Server is processing. Otherwise change (a) from "shuts down" to "restarts"... as long as SSAS isn't actively doing anything while SQL Server is processing, there shouldn't be any concern that it will steal memory back.
This also assumes that you want each service to overlap memory consumption, and use the same memory at different times - I'm sure there are ways with affinity / NUMA etc. to completely segregate their operations space or, in the worst case, to host them on different machines.
Looking at your RAM availablity for this particular server and you are running several databases ranging from 30GB to 5 GB, you definitely need more RAM on this server.
You have not mentioned that this is a stand alone instance or this server is having more than one instance of sql server running.
Your MAX Memory settings seems OK for a server having 8GB RAM. See these suggested best practice settings from Glenn Berry.
I would highly recommend you to do a baseline of your environment using below PERFMON counters to get a good value of your memory configuration :
- SQL Server:Buffer Manager\Page Life Expectancy
- SQL Server:Buffer Manager\Page reads/sec
- Physical Disk\Disk Reads/sec
- Memory\Available Mbytes
- SQL Server: Memory Manager - Total Server Memory
- SQL Server: Memory Manager - Target Server Memory
Total Server Memory: Amount of memory currently allocated to Buffer Pool and not the total amount of memory to SQL Server
Target Server memory: Ideal Size of the buffer pool corresponding to max memory for the instance.
Note: If Total Server Memory > Target Server memory, then it suggests memory pressure.
Below script will help you find LOW or HIGH Memory notifications from sys.dm_os_ring_buffers
- system health session :
SELECT CONVERT (varchar(30), GETDATE(), 121) as [RunTime],
dateadd (ms, (rbf.[timestamp] - tme.ms_ticks), GETDATE()) as [Notification_Time],
cast(record as xml).value('(//Record/ResourceMonitor/Notification)[1]', 'varchar(30)') AS [Notification_type],
cast(record as xml).value('(//Record/MemoryRecord/MemoryUtilization)[1]', 'bigint') AS [MemoryUtilization %],
cast(record as xml).value('(//Record/MemoryNode/@id)[1]', 'bigint') AS [Node Id],
cast(record as xml).value('(//Record/ResourceMonitor/IndicatorsProcess)[1]', 'int') AS [Process_Indicator],
cast(record as xml).value('(//Record/ResourceMonitor/IndicatorsSystem)[1]', 'int') AS [System_Indicator],
cast(record as xml).value('(//Record/MemoryNode/ReservedMemory)[1]', 'bigint') AS [SQL_ReservedMemory_KB],
cast(record as xml).value('(//Record/MemoryNode/CommittedMemory)[1]', 'bigint') AS [SQL_CommittedMemory_KB],
cast(record as xml).value('(//Record/MemoryNode/AWEMemory)[1]', 'bigint') AS [SQL_AWEMemory],
cast(record as xml).value('(//Record/MemoryNode/SinglePagesMemory)[1]', 'bigint') AS [SinglePagesMemory],
cast(record as xml).value('(//Record/MemoryNode/MultiplePagesMemory)[1]', 'bigint') AS [MultiplePagesMemory],
cast(record as xml).value('(//Record/MemoryRecord/TotalPhysicalMemory)[1]', 'bigint') AS [TotalPhysicalMemory_KB],
cast(record as xml).value('(//Record/MemoryRecord/AvailablePhysicalMemory)[1]', 'bigint') AS [AvailablePhysicalMemory_KB],
cast(record as xml).value('(//Record/MemoryRecord/TotalPageFile)[1]', 'bigint') AS [TotalPageFile_KB],
cast(record as xml).value('(//Record/MemoryRecord/AvailablePageFile)[1]', 'bigint') AS [AvailablePageFile_KB],
cast(record as xml).value('(//Record/MemoryRecord/TotalVirtualAddressSpace)[1]', 'bigint') AS [TotalVirtualAddressSpace_KB],
cast(record as xml).value('(//Record/MemoryRecord/AvailableVirtualAddressSpace)[1]', 'bigint') AS [AvailableVirtualAddressSpace_KB],
cast(record as xml).value('(//Record/@id)[1]', 'bigint') AS [Record Id],
cast(record as xml).value('(//Record/@type)[1]', 'varchar(30)') AS [Type],
cast(record as xml).value('(//Record/@time)[1]', 'bigint') AS [Record Time],
tme.ms_ticks as [Current Time]
FROM sys.dm_os_ring_buffers rbf
cross join sys.dm_os_sys_info tme
where rbf.ring_buffer_type = 'RING_BUFFER_RESOURCE_MONITOR'
--and cast(record as xml).value('(//Record/ResourceMonitor/Notification)[1]', 'varchar(30)') = 'RESOURCE_MEMPHYSICAL_LOW'
ORDER BY rbf.timestamp ASC
Some good references :
Best Answer
You'll want to use the resource governor. Here is a good blog.
Enable Resource Governor (do some research on this):
This will tell you how much % of your memory R can use.
Sample query to change values from the link:
Don't forget to run reconfigure again: