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-- Copyright 2018 Tanel Poder. All rights reserved. More info at http://tanelpoder.com
-- Licensed under the Apache License, Version 2.0. See LICENSE.txt for terms & conditions.
--------------------------------------------------------------------------------
--
-- File name: ioeff.sql
-- Purpose: Display various Exadata IO efficiency metrics
-- from all Exadata RAC cluster nodes
--
-- Author: Tanel Poder
-- Copyright: (c) 2012 http://blog.tanelpoder.com
--
-- Usage: Run ioeff.sql
--
-- Other: This is still a raw experimental script and doesn't do a good
-- job with explaining these metrics well yet
--
--------------------------------------------------------------------------------
SET LINES 999 PAGES 5000 TRIMOUT ON TRIMSPOOL ON TAB OFF
COL ioeff_percentage FOR A52
BREAK ON inst_id SKIP 1
WITH sq AS (
SELECT
*
FROM (
SELECT inst_id, name, value
FROM gv$sysstat
WHERE
name LIKE 'cell%bytes%'
OR name LIKE 'physical%bytes%'
)
PIVOT (
SUM(value)
FOR name IN (
'physical read total bytes' AS phyrd_bytes
, 'physical write total bytes' AS phywr_bytes
, 'physical read total bytes optimized' AS phyrd_optim_bytes
, 'cell physical IO bytes eligible for predicate offload' AS pred_offload_bytes
, 'cell physical IO interconnect bytes' AS interconnect_bytes
, 'cell physical IO interconnect bytes returned by smart scan' AS smart_scan_ret_bytes
, 'cell physical IO bytes saved by storage index' AS storidx_saved_bytes
, 'cell IO uncompressed bytes' AS uncompressed_bytes
)
)
),
precalc AS (
SELECT
inst_id
, ROUND((phyrd_bytes)/(1024*1024*1024)) db_physrd_gb
, ROUND((phywr_bytes)/(1024*1024*1024)) db_physwr_gb
, ROUND((phyrd_bytes+phywr_bytes)/(1024*1024*1024)) db_physio_gb
, ROUND(pred_offload_bytes/(1024*1024*1024)) pred_offload_gb
, ROUND(phyrd_optim_bytes/(1024*1024*1024)) phyrd_optim_gb
, ROUND((phyrd_optim_bytes-storidx_saved_bytes)/(1024*1024*1024)) phyrd_flash_rd_gb
, ROUND((phyrd_bytes-phyrd_optim_bytes)/(1024*1024*1024)) spin_disk_rd_gb
, ROUND((phyrd_bytes+phywr_bytes-phyrd_optim_bytes)/(1024*1024*1024)) spin_disk_io_gb
, ROUND(uncompressed_bytes/(1024*1024*1024)) scanned_uncomp_gb
, ROUND(interconnect_bytes/(1024*1024*1024)) total_ic_gb
, ROUND(smart_scan_ret_bytes/(1024*1024*1024)) smart_scan_gb
, ROUND((interconnect_bytes-smart_scan_ret_bytes)/(1024*1024*1024)) non_smart_scan_gb
FROM sq
),
precalc2 AS (
SELECT
inst_id
, db_physio_gb
, db_physrd_gb
, db_physwr_gb
, pred_offload_gb
, phyrd_optim_gb
, phyrd_flash_rd_gb + spin_disk_rd_gb phyrd_disk_and_flash_gb
, phyrd_flash_rd_gb
, spin_disk_io_gb
, spin_disk_rd_gb
, spin_disk_io_gb - spin_disk_rd_gb AS spin_disk_wr_gb
, scanned_uncomp_gb
, ROUND((scanned_uncomp_gb/spin_disk_rd_gb)*db_physrd_gb) est_full_uncomp_gb
, total_ic_gb
, smart_scan_gb
, non_smart_scan_gb
FROM
precalc
),
--SELECT
-- inst_id
-- , SUM(db_physio_gb)
-- , SUM(db_physrd_gb)
-- , SUM(db_physwr_gb)
-- , SUM(pred_offload_gb)
-- , SUM(phyrd_optim_gb)
-- , SUM(spin_disk_io_gb)
-- , SUM(spin_disk_rd_gb)
-- , SUM(spin_disk_io_gb - spin_disk_rd_gb) AS spin_disk_wr_gb
-- , SUM(scanned_uncomp_gb)
-- , ROUND(SUM((scanned_uncomp_gb/spin_disk_rd_gb)*db_physrd_gb)) AS est_full_uncomp_gb
-- , SUM(total_ic_gb)
-- , SUM(smart_scan_gb)
-- , SUM(non_smart_scan_gb)
--FROM
-- precalc2
--GROUP BY ROLLUP
-- (inst_id)
--/
unpivoted AS (
SELECT * FROM precalc2
UNPIVOT (
gb
FOR metric
IN (
phyrd_optim_gb
, phyrd_disk_and_flash_gb
, phyrd_flash_rd_gb
, scanned_uncomp_gb
, est_full_uncomp_gb
, non_smart_scan_gb
, smart_scan_gb
, total_ic_gb
, pred_offload_gb
, spin_disk_rd_gb
, spin_disk_wr_gb
, spin_disk_io_gb
, db_physrd_gb
, db_physwr_gb
, db_physio_gb
)
)
),
metric AS (
SELECT 'ADVANCED' type, 'AVOID_DISK_IO' category, 'PHYRD_OPTIM_GB' name FROM dual UNION ALL
SELECT 'ADVANCED', 'AVOID_DISK_IO', 'PHYRD_DISK_AND_FLASH_GB' FROM dual UNION ALL
SELECT 'ADVANCED', 'AVOID_DISK_IO', 'PHYRD_FLASH_RD_GB' FROM dual UNION ALL
SELECT 'ADVANCED', 'COMPRESS', 'SCANNED_UNCOMP_GB' FROM dual UNION ALL
SELECT 'ADVANCED', 'COMPRESS', 'EST_FULL_UNCOMP_GB' FROM dual UNION ALL
SELECT 'ADVANCED', 'REDUCE_INTERCONNECT', 'TOTAL_IC_GB' FROM dual UNION ALL
SELECT 'ADVANCED', 'REDUCE_INTERCONNECT', 'NON_SMART_SCAN_GB' FROM dual UNION ALL
SELECT 'ADVANCED', 'REDUCE_INTERCONNECT', 'SMART_SCAN_GB' FROM dual UNION ALL
SELECT 'ADVANCED', 'REDUCE_INTERCONNECT', 'PRED_OFFLOAD_GB' FROM dual UNION ALL
SELECT 'ADVANCED', 'DISK_IO', 'SPIN_DISK_RD_GB' FROM dual UNION ALL
SELECT 'ADVANCED', 'DISK_IO', 'SPIN_DISK_WR_GB' FROM dual UNION ALL
SELECT 'ADVANCED', 'DISK_IO', 'SPIN_DISK_IO_GB' FROM dual UNION ALL
SELECT 'ADVANCED', 'DISK_IO', 'DB_PHYSRD_GB' FROM dual UNION ALL
SELECT 'ADVANCED', 'DISK_IO', 'DB_PHYSWR_GB' FROM dual UNION ALL
SELECT 'ADVANCED', 'DISK_IO', 'DB_PHYSIO_GB' FROM dual
)
SELECT
inst_id
, type
, category
, metric
, '|'||RPAD(NVL(RPAD('#', ROUND(gb / (SELECT MAX(GB) FROM unpivoted) * 50 ), '#'), ' '), 50, ' ')||'|' ioeff_percentage
, gb
FROM
unpivoted u
, metric m
WHERE
u.metric = m.name
/