SCOM DataWare House grooming.

Query to check the size of the tables.

SELECT DB_NAME() AS DbName,
name AS FileName,
size/128.0 AS CurrentSizeMB,
size/128.0 - CAST(FILEPROPERTY(name, 'SpaceUsed') AS INT)/128.0 AS FreeSpaceMB
FROM sys.database_files;

Get size of the database.
SELECT DB_NAME(database_id) AS DatabaseName,
Name AS Logical_Name,
Physical_Name, (size*8)/1024 SizeMB
FROM sys.master_files
GO

Query to check DW data dates.

Select     min(datetime)as MinDate, max(datetime)as MaxDate ,   datediff(d,min(datetime),max(datetime)) AS NoOfDaysInDataSet from Perf.vPerfHourly

My query showed that there was 424 days of data.

MinDate    MaxDate    NoOfDaysInDataSet
2015-10-09 21:00:00.000    2016-12-06 13:00:00.000    424

Tool for modifying the datawarehouse grooming settings can be downloaded here.

https://blogs.technet.microsoft.com/momteam/2008/05/13/data-warehouse-data-retention-policy-dwdatarp-exe/

Command to run the dwdatarp.exe to get the current sizes of datasets.

C:\temp>dwdatarp.exe -s servername\instancename -d operationsmanagerdw > c:\temp\dwoutput.txt

Dataset name                          Aggregation name     Max Age         Current Size, Kb

Alert data set                             Raw data                           400          104,752 (  0%)
Client Monitoring data set     Raw data                           30              0 (  0%)
Client Monitoring data set     Daily aggregations          400            96 (  0%)
Configuration dataset             Raw data                           400            485,120 (  1%)
DPM event dataset                  Raw data                           400             0 (  0%)
Event data set                           Raw data                           100             12,315,568 ( 14%)
Performance data set              Raw data                           10                4,316,832 (  5%)
Performance data set              Hourly aggregations       400            44,009,336 ( 50%)
Performance data set              Daily aggregations          400            2,049,856 (  2%)
State data set                            Raw data                           180            121,784 (  0%)
State data set                            Hourly aggregations       400           22,979,912 ( 26%)
State data set                            Daily aggregations          400           1,395,216 (  2%)

Changing the grooming settings. Adjust the time according to my reporting requirements.

dwdatarp.exe -s SERVERNAME\INSTANCENAME -d OperationsManagerDW -ds "Alert data set" -a "Raw data" -m 180

dwdatarp.exe -s SERVERNAME\INSTANCENAME -d OperationsManagerDW -ds "Performance data set" -a "Hourly aggregations" -m 90

dwdatarp.exe -s SERVERNAME\INSTANCENAME -d OperationsManagerDW -ds "Performance data set" -a "Daily aggregations" -m 365

dwdatarp.exe -s SERVERNAME\INSTANCENAME -d OperationsManagerDW -ds "Event data set" -a "Raw Data" -m 30

dwdatarp.exe -s SERVERNAME\INSTANCENAME -d OperationsManagerDW -ds "State data set" -a "Raw data" -m 90

dwdatarp.exe -s SERVERNAME\INSTANCENAME -d OperationsManagerDW -ds "State data set" -a "Hourly aggregations" -m 90

dwdatarp.exe -s SERVERNAME\INSTANCENAME -d OperationsManagerDW -ds "State data set" -a "Daily aggregations" -m 90

Manually run partitioning and grooming on SCOM database

The following query if run on the SCOM db will run the grooming on all the partition tables. There are 122 partition tables in SCOM 2012. This will run for each one of them as their Iscurrent value is set to 1.

/*-------------------------------*/

declare @counter int  set @counter = 0  while @counter < 122

begin

exec p_PartitioningAndGrooming

set @counter = @counter + 1

print 'The counter is ' + cast(@counter as char)

end

/*-----------------------------*/