Click here to monitor SSC
SQLServerCentral is supported by Redgate
 
Log in  ::  Register  ::  Not logged in
 
 
 


Memory assigned to the OS


Memory assigned to the OS

Author
Message
sunny.tjk
sunny.tjk
Old Hand
Old Hand (327 reputation)Old Hand (327 reputation)Old Hand (327 reputation)Old Hand (327 reputation)Old Hand (327 reputation)Old Hand (327 reputation)Old Hand (327 reputation)Old Hand (327 reputation)

Group: General Forum Members
Points: 327 Visits: 1344
Total physical RAM on the system is 288GB.
Min and Max memory assigned to SQL Server is 0 and 280GB.
Should I assume that 8GB is assigned to the OS? Is there a way to verify the amount of memory assigned to the OS?
GilaMonster
GilaMonster
SSC-Forever
SSC-Forever (47K reputation)SSC-Forever (47K reputation)SSC-Forever (47K reputation)SSC-Forever (47K reputation)SSC-Forever (47K reputation)SSC-Forever (47K reputation)SSC-Forever (47K reputation)SSC-Forever (47K reputation)

Group: General Forum Members
Points: 47241 Visits: 44377
There's no memory 'assigned' to the OS. 8GB is what SQL is leaving for the OS and any other app running on that server. That's rather a high figure for max server memory for that much memory.

Chapter 4: https://www.simple-talk.com/books/sql-books/troubleshooting-sql-server-a-guide-for-the-accidental-dba/


Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability

We walk in the dark places no others will enter
We stand on the bridge and no one may pass


sunny.tjk
sunny.tjk
Old Hand
Old Hand (327 reputation)Old Hand (327 reputation)Old Hand (327 reputation)Old Hand (327 reputation)Old Hand (327 reputation)Old Hand (327 reputation)Old Hand (327 reputation)Old Hand (327 reputation)

Group: General Forum Members
Points: 327 Visits: 1344
GilaMonster (9/26/2013)
There's no memory 'assigned' to the OS. 8GB is what SQL is leaving for the OS and any other app running on that server. That's rather a high figure for max server memory for that much memory.

Chapter 4: https://www.simple-talk.com/books/sql-books/troubleshooting-sql-server-a-guide-for-the-accidental-dba/


Ok.
It was written in this book that "
As a general base configuration, for a dedicated SQL Server machine, reserve 1 GB of RAM
for the OS, 1 GB for each 4 GB of RAM installed from 4–16 GB, and then 1 GB for every 8
GB RAM installed above 16 GB RAM. This means that, for a server with 64 GB RAM, the
starting point for max server memory should be in the 54 GB range, and then tuned
higher based on monitoring the Memory\Available Mbytes performance counter."


Gail, please correct me if I'm wrong-- I'm thinking the max SQL server memory setting would be 250GB.
Joy Smith San
Joy Smith San
SSCrazy
SSCrazy (2.1K reputation)SSCrazy (2.1K reputation)SSCrazy (2.1K reputation)SSCrazy (2.1K reputation)SSCrazy (2.1K reputation)SSCrazy (2.1K reputation)SSCrazy (2.1K reputation)SSCrazy (2.1K reputation)

Group: General Forum Members
Points: 2077 Visits: 3198
..It's ideal. But it's definitely depended on what other applications you have in the box as well...
Joy Smith San
Joy Smith San
SSCrazy
SSCrazy (2.1K reputation)SSCrazy (2.1K reputation)SSCrazy (2.1K reputation)SSCrazy (2.1K reputation)SSCrazy (2.1K reputation)SSCrazy (2.1K reputation)SSCrazy (2.1K reputation)SSCrazy (2.1K reputation)

Group: General Forum Members
Points: 2077 Visits: 3198
Edit --- Posted for wrong question..
Go


Permissions

You can't post new topics.
You can't post topic replies.
You can't post new polls.
You can't post replies to polls.
You can't edit your own topics.
You can't delete your own topics.
You can't edit other topics.
You can't delete other topics.
You can't edit your own posts.
You can't edit other posts.
You can't delete your own posts.
You can't delete other posts.
You can't post events.
You can't edit your own events.
You can't edit other events.
You can't delete your own events.
You can't delete other events.
You can't send private messages.
You can't send emails.
You can read topics.
You can't vote in polls.
You can't upload attachments.
You can download attachments.
You can't post HTML code.
You can't edit HTML code.
You can't post IFCode.
You can't post JavaScript.
You can post emoticons.
You can't post or upload images.

Select a forum

































































































































































SQLServerCentral


Search