LPIM on SQL2012R2

Hi Experts,

How to enable LPIM on SQL server 2012R2 ?
Or how to check if its on or off ?
Eprs_AdminSystem ArchitectAsked:
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ste5anSenior DeveloperCommented:
See How to enable the "locked pages" feature in SQL Server 2012.

You need to assign the LPIM user right to the SQL Server account.
Eprs_AdminSystem ArchitectAuthor Commented:
Thanks but this link is just info.
Where to configure it and how ?
ste5anSenior DeveloperCommented:
At the default place for service accounts:

How to: Enable the Lock Pages in Memory Option (Windows)
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Eprs_AdminSystem ArchitectAuthor Commented:
ok this is done.
But how to check if its really on and working ?
ste5anSenior DeveloperCommented:
In SSMS, e.g.

DBCC MemoryStatus;

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Eprs_AdminSystem ArchitectAuthor Commented:
ok and which value ?
ste5anSenior DeveloperCommented:
Locked Pages Allocated
Eprs_AdminSystem ArchitectAuthor Commented:
ok, on my DB, this value is always 0.
Is it ok ?
Vitor MontalvãoMSSQL Senior EngineerCommented:
0 means it's disabled. If you want to enable it then set it to 1.
By the way, why you need to enable it?
Eprs_AdminSystem ArchitectAuthor Commented:
we had performance issues and we changed something
Eprs_AdminSystem ArchitectAuthor Commented:
first I did:

Read Committed Snapshot:
ALTER DATABASE <DBName> SET READ_COMMITTED_SNAPSHOT ON
GO
ALTER DATABASE <DBName> SET ALLOW_SNAPSHOT_ISOLATION ON
GO
Eprs_AdminSystem ArchitectAuthor Commented:
second I did:

Locked Pages in Memory
https://support.microsoft.com/en-us/kb/2659143 

But I am still not sure if locked pages are active
Vitor MontalvãoMSSQL Senior EngineerCommented:
LPIM is a permission that you need to give to an user. In this case to SQL Server account.

Anyway, if you're facing performance issues how do you know that giving this permission will solve it?
Eprs_AdminSystem ArchitectAuthor Commented:
I messured it and now the average wait time is much more shorter, nearly factor 100.

from 200ms in busiy hours to 2 ms
Vitor MontalvãoMSSQL Senior EngineerCommented:
You got those values after enabling LPIM?
Eprs_AdminSystem ArchitectAuthor Commented:
Yes LPIM and Commited Snapshots like the TSQL commands before.
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