49 lines
2.6 KiB
MySQL
49 lines
2.6 KiB
MySQL
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-- Copyright 2018 Tanel Poder. All rights reserved. More info at http://tanelpoder.com
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-- Licensed under the Apache License, Version 2.0. See LICENSE.txt for terms & conditions.
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-- this script uses "ASH math" by John Beresniewicz, Graham Wood and Uri Shaft
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-- for estimating the event counts (and average durations):
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-- https://www.slideshare.net/jberesni/ash-architecture-and-advanced-usage-rmoug2014-36611678
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COL evh_event HEAD WAIT_EVENT for A50 TRUNCATE
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COL evh_graph HEAD "Event|Breakdown" JUST CENTER FOR A12
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COL evh_cell_graph HEAD "Cell Event|Breakdown" JUST CENTER FOR A12
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COL pct_cell_time HEAD "% Cell|Time"
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COL pct_evt_time HEAD "% Event|Time"
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COL evh_est_total_ms HEAD "Estimated|Total ms"
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COL evh_millisec HEAD "Wait time|bucket ms+" FOR 999999
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COL evh_event HEAD "Wait Event"
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COL evh_sample_count HEAD "Num ASH|Samples"
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COL evh_est_event_count HEAD "Estimated|Total Waits"
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COL evh_cell_path HEAD "Cell Path" FOR A16
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BREAK ON evh_event SKIP 1 ON evh_cell_path SKIP 1 NODUPLICATES
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SELECT
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event evh_event
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, cell_path evh_cell_path
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, CASE WHEN time_waited = 0 THEN 0 ELSE TRUNC(POWER(2,TRUNC(LOG(2,time_waited/1000)))) END evh_millisec
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, COUNT(*) evh_sample_count
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, ROUND(SUM(CASE WHEN time_waited >= 1000000 THEN 1 WHEN time_waited = 0 THEN 0 ELSE 1000000 / time_waited END),1) evh_est_event_count
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, ROUND(CASE WHEN time_waited = 0 THEN 0 ELSE TRUNC(POWER(2,TRUNC(LOG(2,time_waited/1000)))) END * COUNT(*),1) evh_est_total_ms
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, ROUND ( 100 * RATIO_TO_REPORT( CASE WHEN time_waited = 0 THEN 0 ELSE TRUNC(POWER(2,TRUNC(LOG(2,time_waited/1000)))) END * COUNT(*) ) OVER (PARTITION BY event) , 1 ) pct_evt_time
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, '|'||RPAD(NVL(RPAD('#', ROUND (10 * RATIO_TO_REPORT( CASE WHEN time_waited = 0 THEN 0 ELSE TRUNC(POWER(2,TRUNC(LOG(2,time_waited/1000)))) END * COUNT(*) ) OVER (PARTITION BY event)), '#'),' '), 10)||'|' evh_graph
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, ROUND ( 100 * RATIO_TO_REPORT( CASE WHEN time_waited = 0 THEN 0 ELSE TRUNC(POWER(2,TRUNC(LOG(2,time_waited/1000)))) END * COUNT(*) ) OVER (PARTITION BY event, cell_path) , 1 ) pct_cell_time
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, '|'||RPAD(NVL(RPAD('#', ROUND (10 * RATIO_TO_REPORT( CASE WHEN time_waited = 0 THEN 0 ELSE TRUNC(POWER(2,TRUNC(LOG(2,time_waited/1000)))) END * COUNT(*) ) OVER (PARTITION BY event, cell_path)), '#'),' '), 10)||'|' evh_cell_graph
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FROM
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v$cell
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, V$ACTIVE_SESSION_HISTORY
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--dba_hist_active_sess_history
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WHERE
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regexp_like(event, '&1')
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AND v$cell.cell_hashval = v$active_session_history.p1
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AND sample_time > SYSDATE - 1
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AND time_waited > 0 -- TODO
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GROUP BY
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event
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, cell_path
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, CASE WHEN time_waited = 0 THEN 0 ELSE TRUNC(POWER(2,TRUNC(LOG(2,time_waited/1000)))) END -- evh_millisec
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ORDER BY 1, 2
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/
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