2026-03-12 20:23:15
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202
vdh/awr_load_history.sql
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202
vdh/awr_load_history.sql
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/* when using statspack, this query shows the statspack summary (same values as 'Load Profile' in statspack report)
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for each snapshot during the last week.
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Thus you can quickly check the database load history and then run statspack report on desired snap_id if you want further details.
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It shows following columns for each timestamp:
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Redo size (in blocks) per second
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Logical reads per second
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Block changes per second
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Physical reads per second (disk io/secs)
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Physical writes per second
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User calls per second
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Parses per second
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Hard parses per second
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Sorts per second
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Logons per second
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Executes per second
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Transactions per second
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Blocks changed per Read %
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Recursive Call %
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Rollback per transaction %
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Rows per Sort %
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cpu per elapsed %
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Buffer hit ratio %
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This query shows history for the seven last days.
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You can modify it on the first lines
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*/
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set linesize 500
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set pagesize 9999
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alter session set nls_numeric_characters=',.';
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set trimspool on
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set tab off
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set verify off
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set feedback off
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column instance_number format 99
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column bsnap_id format 9999999
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column bsnap_time format a16
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column esnap_id format 9999999
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column esnap_time format a16
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column redo_blocks format 999999999990D999
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column logical_reads format 999999999990D999
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column block_changes format 999999999990D999
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column physical_reads format 999999999990D999
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column physical_writes format 999999999990D999
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column user_calls format 999999999990D999
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column parses format 999999999990D999
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column hard_parses format 999999999990D999
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column sorts format 999999999990D999
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column logons format 999999999990D999
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column executes format 999999999990D999
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column transactions format 999999999990D999
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column changes_per_read format a8
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column recursive format a8
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column rollback format a8
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column rows_per_sort format a18
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column cpusecs_pct format 99990D00
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column rec_cpusecs_pct format 99990D00
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column parse_cpusecs_pct format 99990D00
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column buffer_hit format a8
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column undo_records format 99999999999999999
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column rollbacks format 99999999999999999
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column a format a500
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prompt Enter the begindate in the format DD/MM/YYYY HH24:MI
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accept start_time prompt 'begin date: '
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prompt Enter the enddate in the format DD/MM/YYYY HH24:MI
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accept end_time prompt 'end date: '
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prompt Enter the spoolfile
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accept spoolfile prompt 'spool file: '
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spool &spoolfile
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WITH p as
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( select dbid, instance_number, snap_id,
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lag(snap_id, 1, snap_id) over
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( partition by dbid, instance_number
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order by snap_id
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) prev_snap_id,
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begin_interval_time, end_interval_time
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from dba_hist_snapshot
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where begin_interval_time between
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to_timestamp ('&start_time', 'DD/MM/YYYY HH24:MI')
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and to_timestamp ('&end_time', 'DD/MM/YYYY HH24:MI')
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),
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s as
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( select d.name database, p.dbid, p.instance_number, p.prev_snap_id bsnap_id, p.snap_id esnap_id,
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p.begin_interval_time bsnap_time, p.end_interval_time esnap_time, bs.stat_name,
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round((es.value-bs.value)/( extract(second from (p.end_interval_time - p.begin_interval_time))
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+ extract(minute from (p.end_interval_time - p.begin_interval_time)) * 60
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+ extract(hour from (p.end_interval_time - p.begin_interval_time)) * 60 * 60
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+ extract(day from (p.end_interval_time - p.begin_interval_time)) * 24 * 60 * 60
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)
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,6
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) valuepersecond
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from v$database d, p,
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dba_hist_sysstat bs, dba_hist_sysstat es
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where d.dbid = p.dbid
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and ( p.dbid = bs.dbid
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and p.instance_number = bs.instance_number
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and p.prev_snap_id = bs.snap_id
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)
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and ( p.dbid = es.dbid
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and p.instance_number = es.instance_number
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and p.snap_id = es.snap_id
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)
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and ( bs.stat_id = es.stat_id
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and bs.instance_number = es.instance_number
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and bs.stat_name=es.stat_name
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)
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and bs.stat_name in
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( 'redo size','redo blocks written','session logical reads','db block changes','physical reads','physical writes','user calls',
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'parse count (total)','parse count (hard)','sorts (memory)','sorts (disk)','logons cumulative','execute count','user rollbacks',
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'user commits', 'recursive calls','sorts (rows)','CPU used by this session','recursive cpu usage','parse time cpu',
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'rollback changes - undo records applied', 'DB time', 'Read IO (MB)', 'Write IO (MB)'
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)
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),
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g as
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( select /*+ FIRST_ROWS */
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database, instance_number, bsnap_id, esnap_id, bsnap_time, esnap_time,
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sum(decode( stat_name, 'redo size' , valuepersecond, 0 )) redo_size,
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sum(decode( stat_name, 'redo blocks written' , valuepersecond, 0 )) redo_blocks,
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sum(decode( stat_name, 'session logical reads' , valuepersecond, 0 )) logical_reads,
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sum(decode( stat_name, 'db block changes' , valuepersecond, 0 )) block_changes,
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sum(decode( stat_name, 'physical reads' , valuepersecond, 0 )) physical_reads ,
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sum(decode( stat_name, 'physical writes' , valuepersecond, 0 )) physical_writes,
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sum(decode( stat_name, 'user calls' , valuepersecond, 0 )) user_calls,
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sum(decode( stat_name, 'recursive calls' , valuepersecond, 0 )) recursive_calls,
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sum(decode( stat_name, 'parse count (total)' , valuepersecond, 0 )) parses ,
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sum(decode( stat_name, 'parse count (hard)' , valuepersecond, 0 )) hard_parses ,
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sum(decode( stat_name, 'sorts (rows)' , valuepersecond, 0 )) sort_rows ,
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sum(decode( stat_name, 'sorts (memory)' , valuepersecond,
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'sorts (disk)' , valuepersecond, 0 )) sorts ,
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sum(decode( stat_name, 'logons cumulative' , valuepersecond, 0 )) logons ,
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sum(decode( stat_name, 'execute count' , valuepersecond, 0 )) executes ,
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sum(decode( stat_name, 'user rollbacks' , valuepersecond,
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'user commits' , valuepersecond, 0 )) transactions,
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sum(decode( stat_name, 'user rollbacks' , valuepersecond, 0 )) rollbacks,
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sum(decode( stat_name, 'rollback changes - undo records applied' , valuepersecond, 0 )) undo_records,
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sum(decode( stat_name, 'CPU used by this session' , valuepersecond/100, 0 )) cpusecs,
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sum(decode( stat_name, 'recursive cpu usage' , valuepersecond/100, 0 )) rec_cpusecs,
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sum(decode( stat_name, 'parse time cpu' , valuepersecond/100, 0 )) parse_cpusecs,
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sum(decode( stat_name, 'DB time' , valuepersecond, 0 )) db_time,
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sum(decode( stat_name, 'Read IO (MB)' , valuepersecond, 0 )) read_io_mb,
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sum(decode( stat_name, 'Write IO (MB)' , valuepersecond, 0 )) write_io_mb
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from s
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group by database,instance_number, bsnap_id, esnap_id, bsnap_time, esnap_time
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)
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/*select instance_number, bsnap_id, to_char(bsnap_time,'DD-MON-YY HH24:MI') bsnap_time_str, esnap_id, to_char(esnap_time,'DD-MON-YY HH24:MI') esnap_time_str,read_io_mb, write_io_mb
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db_time, redo_blocks, logical_reads, block_changes, physical_reads,
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physical_writes, user_calls, parses, hard_parses, sorts, logons, executes, transactions,
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to_char(100 * (block_changes / decode(logical_reads,0,1,logical_reads)),'990D00')||'%' changes_per_read,
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to_char(100 * (recursive_calls / decode(user_calls + recursive_calls, 0, 1,user_calls + recursive_calls)),'990D00') ||'%' recursive,
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to_char(100 * (rollbacks / decode(transactions,0,1,transactions)),'990D00') ||'%' rollback,
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to_char(decode(sorts, 0, NULL, (sort_rows/sorts)),'99999999999999999') rows_per_sort,
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100 * cpusecs cpusecs_pct,
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100 * rec_cpusecs rec_cpusecs_pct,
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100 * parse_cpusecs parse_cpusecs_pct,
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to_char(100 * (1 - physical_reads / decode(logical_reads, 0, 1,logical_reads)),'990D00') ||'%' buffer_hit,
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undo_records, rollbacks
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*/select
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(instance_number ||';'||
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bsnap_id ||';'||
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to_char(bsnap_time,'DD-MON-YY HH24:MI') ||';'||
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esnap_id ||';'||
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to_char(esnap_time,'DD-MON-YY HH24:MI') ||';'||
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db_time ||';' ||
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redo_blocks ||';'||
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logical_reads ||';'||
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block_changes ||';'||
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physical_reads ||';'||
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physical_writes ||';'||
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user_calls ||';'||
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parses ||';'||
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hard_parses ||';'||
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sorts ||';'||
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logons ||';'||
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executes ||';'||
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transactions ||';'||
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to_char(100 * (block_changes / decode(logical_reads,0,1,logical_reads)),'990D00')||'%' ||';'||
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to_char(100 * (recursive_calls / decode(user_calls + recursive_calls, 0, 1,user_calls + recursive_calls)),'990D00') ||'%' ||';'||
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to_char(100 * (rollbacks / decode(transactions,0,1,transactions)),'990D00') ||'%' ||';'||
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to_char(decode(sorts, 0, NULL, (sort_rows/sorts)),'99999999999999999') ||';'||
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100 * cpusecs ||';'||
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100 * rec_cpusecs ||';'||
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100 * parse_cpusecs ||';'||
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-- to_char(100 * (1 - physical_reads / decode(logical_reads, 0, 1,logical_reads)),'990D00') ||'%' ||';'||
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undo_records ||';'||
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rollbacks
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) a
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from g
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order by instance_number, bsnap_time;
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spool off
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set feedback on
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