-- dba.v_phys_IO_read_perminute - Physical IO read rate per minute

-- Downloaded from http://www.ebenner.com/db2luwdba-howto
-- For use only with other components from article series:
-- "Effective DB2 Monitoring with Snapshot Administrative Views"
-- by Jeffrey Benner, in _DB2 LUW DBA HowTo_
-- Please direct any questions to consulting@ebenner.com

-- This work is licensed under the Creative Commons Attribution 3.0 United States License. To view a copy of this license, visit http://creativecommons.org/licenses/by/3.0/us/ or send a letter to Creative Commons, 171 Second Street, Suite 300, San Francisco, California, 94105, USA.

create view dba.v_phys_IO_read_perminute as
with POOL_DATA_L_READS_DELTA_TB as
(select snap0.SNAPSHOT_TIMESTAMP,
( POOL_DATA_L_READS  -
         ( select POOL_DATA_L_READS
          from dba.snapdb as SNAP1
          where snap1.SNAPSHOT_TIMESTAMP = ( select max(snap2.SNAPSHOT_TIMESTAMP)
                                             from dba.snapdb as SNAP2
                                             where snap2.SNAPSHOT_TIMESTAMP < snap0.SNAPSHOT_TIMESTAMP
                                           )

         )
) as POOL_DATA_L_READS_DELTA
from dba.snapdb as SNAP0 ),

POOL_DATA_P_READS_DELTA_TB as
(select snap0.SNAPSHOT_TIMESTAMP,
( POOL_DATA_P_READS  -
         ( select POOL_DATA_P_READS
          from dba.snapdb as SNAP1
          where snap1.SNAPSHOT_TIMESTAMP = ( select max(snap2.SNAPSHOT_TIMESTAMP)
                                             from dba.snapdb as SNAP2
                                             where snap2.SNAPSHOT_TIMESTAMP < snap0.SNAPSHOT_TIMESTAMP
                                           )

         )
) as POOL_DATA_P_READS_DELTA
from dba.snapdb as SNAP0 )

select snap0.SNAPSHOT_TIMESTAMP,
decimal(( decimal( POOL_DATA_L_READS_DELTA + POOL_DATA_P_READS_DELTA , 21, 2) /
decimal(timestampdiff(4, char( snap0.SNAPSHOT_TIMESTAMP -
  ( select max(snap2.SNAPSHOT_TIMESTAMP)
  from dba.snapdb as SNAP2
  where snap2.SNAPSHOT_TIMESTAMP < snap0.SNAPSHOT_TIMESTAMP
  )) ), 21, 2) ), 12,1) as PHYS_READ_IO_PER_MINUTE
from dba.snapdb as SNAP0, POOL_DATA_L_READS_DELTA_TB B,
POOL_DATA_P_READS_DELTA_TB C
where SNAP0.SNAPSHOT_TIMESTAMP = B.SNAPSHOT_TIMESTAMP
and SNAP0.SNAPSHOT_TIMESTAMP =   C.SNAPSHOT_TIMESTAMP ;