i think i confused you. i did not set a min memory for DBCC pool. here are my pool settings for DBCC and APP pools:

CREATE RESOURCE POOL [DBCCMaint]

WITH (min_cpu_percent=0,

max_cpu_percent=100,

min_memory_percent=0,

max_memory_percent=10,

cap_cpu_percent=100,

AFFINITY SCHEDULER = AUTO);

GO

CREATE WORKLOAD GROUP [wg_DBCCMaint]

WITH (group_max_requests=0,

importance=Medium,

request_max_cpu_time_sec=0,

request_max_memory_grant_percent=25,

request_memory_grant_timeout_sec=0,

max_dop=0)

USING [DBCCMaint];

GO

my classifier func:

-- APPPOOL:

CREATE RESOURCE POOL [APPPool] WITH(min_cpu_percent=70,

max_cpu_percent=100,

min_memory_percent=70,

max_memory_percent=100,

cap_cpu_percent=100,

AFFINITY SCHEDULER = AUTO

)

GO

-- Classifier Func:

ALTER FUNCTION [dbo].[Fn_RGClassifier]()

RETURNS SYSNAME

WITH SCHEMABINDING

AS

BEGIN

DECLARE @WorkloadGroup SYSNAME

IF (SUSER_SNAME() IN ('DOMAIN\APPUser'))

SET @WorkloadGroup = 'APPGroup'

ELSE IF SUSER_NAME() IN ('DBCCUser')

SET @WorkloadGroup = 'wg_DBCCMaint'

ELSE

SET @WorkloadGroup = 'default'

RETURN @WorkloadGroup

END