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gwenshapgwenshap
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Adding some scripts
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Diff for: ‎ASH2.sql

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-- how much history do we have:
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select min(sample_time) from V$ACTIVE_SESSION_HISTORY
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-- top events
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select event,count(*) from DBA_HIST_ACTIVE_SESS_HISTORY where sample_time> sysdate-1/24
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and user_id>0
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group by event
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order by count(*) desc;
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-- top sql
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select sql_id,count(*) from DBA_HIST_ACTIVE_SESS_HISTORY where sample_time> sysdate-1/24
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and user_id>0
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group by sql_id
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order by count(*) desc;
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-- see specific samples
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select sample_time,user_id,sql_id,event from DBA_HIST_ACTIVE_SESS_HISTORY
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where 1=1
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--and sample_time> to_date('03-MAR-11 15:30','dd-mon-yy hh24:mi')
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and sample_time> sysdate-1/24
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--and user_id>0
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--and session_id=371
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order by sample_time;
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-- look for hot buffers
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select p1,p2,p3,count(*) from DBA_HIST_ACTIVE_SESS_HISTORY
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where sample_time> to_date('03-MAR-11 15:30','dd-mon-yy hh24:mi')
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and sample_time< to_date('03-MAR-11 16:30','dd-mon-yy hh24:mi')
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and user_id>0
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and event='buffer busy waits'
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group by p1,p2,p3
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order by count(*)
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SELECT SEGMENT_NAME, SEGMENT_TYPE FROM DBA_EXTENTS
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WHERE FILE_ID = 1 AND 231928 BETWEEN BLOCK_ID AND
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BLOCK_ID + BLOCKS - 1;
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-- top SQL waiting for a specific events
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select sql_id,count(*) from DBA_HIST_ACTIVE_SESS_HISTORY
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where sample_time> sysdate-1/24
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and user_id>0
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and event is null
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group by sql_id
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order by count(*)
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-- top programs waiting for a specific events
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select program,count(*) from DBA_HIST_ACTIVE_SESS_HISTORY
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where sample_time> to_date('03-MAR-11 15:30','dd-mon-yy hh24:mi')
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and sample_time< to_date('03-MAR-11 16:30','dd-mon-yy hh24:mi')
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and user_id>0
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and event='buffer busy waits'
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group by program
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order by count(*)
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-- top users waiting for a specific events
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select user_id,count(*) from DBA_HIST_ACTIVE_SESS_HISTORY
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where sample_time> to_date('03-MAR-11 15:30','dd-mon-yy hh24:mi')
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and sample_time< to_date('03-MAR-11 16:30','dd-mon-yy hh24:mi')
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and user_id>0
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and event='buffer busy waits'
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group by user_id
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order by count(*) 2 3 4 5 6 7 ;
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-- Everyone waiting for specific event
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select sample_time,user_id,sql_id,event,p1,blocking_session from V$ACTIVE_SESSION_HISTORY
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where event like 'library%'
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-- Who is waiting for specific event the most:
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select SESSION_ID,user_id,sql_id,round(sample_time,'hh'),count(*) from V$ACTIVE_SESSION_HISTORY
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where event like 'log file sync'
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group by SESSION_ID,user_id,sql_id,round(sample_time,'hh')
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order by count(*) desc
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select event,count(*) from DBA_HIST_ACTIVE_SESS_HISTORY
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where sample_time> to_date('03-MAR-11 15:30','dd-mon-yy hh24:mi')
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and sample_time< to_date('03-MAR-11 16:00','dd-mon-yy hh24:mi')
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and user_id>0
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group by event
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order by count(*) desc
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select to_char(trunc(sample_time, 'hh24') + round((cast(sample_time as date)- trunc(cast(sample_time as date), 'hh24'))*60*24/5)*5/60/24, 'dd/mm/yyyy hh24:mi'),count(*) from DBA_HIST_ACTIVE_SESS_HISTORY
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where sample_time> to_date('03-MAR-11 15:30','dd-mon-yy hh24:mi')
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and sample_time< to_date('03-MAR-11 16:30','dd-mon-yy hh24:mi')
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and user_id=209
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and event='buffer busy waits'
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group by to_char(trunc(sample_time, 'hh24') + round((cast(sample_time as date)- trunc(cast(sample_time as date), 'hh24'))*60*24/5)*5/60/24, 'dd/mm/yyyy hh24:mi')
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order by count(*)
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select sql_id,count(*) from V$ACTIVE_SESSION_HISTORY
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where sample_time> to_date('08-FEB-10 13:00','dd-mon-yy hh24:mi')
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and sample_time< to_date('08-FEB-10 16:00','dd-mon-yy hh24:mi')
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and user_id>0
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group by sql_id
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order by count(*) desc
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select * from dba_views where view_name like 'DBA_HIST%'
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select sh.sample_time,sh.SESSION_ID,user_id,sh.sql_id,event,p1,blocking_session,PROGRAM,sql_text
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from DBA_HIST_ACTIVE_SESS_HISTORY sh
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left outer join DBA_HIST_SQLTEXT sq on sq.sql_id=sh.sql_id
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where 1=1
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and sample_time> to_date('08-FEB-10 00:00','dd-mon-yy hh24:mi')
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and sample_time< to_date('08-FEB-10 23:00','dd-mon-yy hh24:mi')
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and user_id=61
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--and sql_id='809u1jtt54kfy'
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order by sample_time
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select trunc(sample_time),
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sum(case when INSTANCE_NUMBER=1 then 1 else 0 end) inst1,
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sum(case when INSTANCE_NUMBER=2 then 1 else 0 end) inst2
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from DBA_HIST_ACTIVE_SESS_HISTORY sh
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where 1=1
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and user_id=61
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group by trunc(sample_time)
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order by trunc(sample_time)
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select * from DBA_HIST_SQLTEXT where sql_id='d15cdr0zt3vtp';
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where dbms_lob.instr(sql_text, 'GLOBAL',1,1) > 0
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desc DBA_HIST_ACTIVE_SESS_HISTORY
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EXEC DBMS_MONITOR.session_trace_enable(session_id =>1234, serial_num=>1234, waits=>TRUE, binds=>FALSE);
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select sample_time,user_id,sql_id,event,p1,blocking_session from V$ACTIVE_SESSION_HISTORY
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where event like 'library%'
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select * from v$active_session_history where session_id=306
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6969666696
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select SESSION_ID,user_id,sql_id,round(sample_time,'hh'),count(*) from V$ACTIVE_SESSION_HISTORY
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where event like 'log file sync'
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group by SESSION_ID,user_id,sql_id,round(sample_time,'hh')
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order by count(*) desc
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select * from dba_users; 61

Diff for: ‎DataGuard.txt

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-- Find which logs were applied in the last day
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SELECT SEQUENCE#, to_char(FIRST_TIME,'hh24:mi:ss dd/mm/yyyy'), to_char(NEXT_TIME,'hh24:mi:ss dd/mm/yyyy'),APPLIED FROM V$ARCHIVED_LOG where next_time>sysdate-1 ORDER BY SEQUENCE# ;
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-- Find last applied log
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select to_char(max(FIRST_TIME),'hh24:mi:ss dd/mm/yyyy') FROM V$ARCHIVED_LOG where applied='YES';
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-- What are the managed standby processes doing?
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SELECT PROCESS, STATUS, THREAD#, SEQUENCE#, BLOCK#, BLOCKS FROM V$MANAGED_STANDBY;
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-- Are we on production or standby?
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SELECT DATABASE_ROLE, DB_UNIQUE_NAME INSTANCE, OPEN_MODE, PROTECTION_MODE, PROTECTION_LEVEL, SWITCHOVER_STATUS FROM V$DATABASE;
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-- Check for errors
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SELECT MESSAGE FROM V$DATAGUARD_STATUS;
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-- Check that the DB was openned correctly
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SELECT RECOVERY_MODE FROM V$ARCHIVE_DEST_STATUS;
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-- important lag statistics
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select * from v$dataguard_stats;
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-- configure log shipping on primary
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alter system set log_archive_dest_3='SERVICE=DEVPCOMB LGWR ASYNC VALID_FOR=(ONLINE_LOGFILES, PRIMARY_ROLE) DB_UNIQUE_NAME=DEVPCOMB';
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alter system set log_archive_dest_state_3='enable';
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-- stopping and starting managed recovery on standby
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alter database recover managed standby database cancel;
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alter database recover managed standby database disconnect;
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ALTER DATABASE RECOVER MANAGED STANDBY DATABASE USING CURRENT LOGFILE disconnect;
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-- Manually register an archive log on standby
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alter database register physical logfile '<fullpath/filename>';
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-- Check if standby logs are configured right
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set lines 100 pages 999
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col member format a70
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select st.group#
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, st.sequence#
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, ceil(st.bytes / 1048576) mb
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, lf.member
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from v$standby_log st
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, v$logfile lf
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where st.group# = lf.group#
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/
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Diff for: ‎README

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=========
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= About =
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=========
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This is a collection of useful Oracle SQL and shell scripts that I use.
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I don't mind how you use these scripts, but give credit if credit is due.
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===========
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= License =
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===========
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Copyright 2011 Gwen Shapira.
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These programs are free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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These programs are distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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==========================================================================
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DataGuard.txt - SQL snippets for monitoring and managing DataGuard
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check_and_kill.sql - SQL for checking on what sessions are doing
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locks.sql - Queries I use to figure out locking issues
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tfsclock.sql - complex query from Oracle that gives a lot of details about locks
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job_scheduling.sql - Queries regarding jobs and schedules
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SSD.sql - queries I use to decide which segments should be placed on SSDs
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undo_space.sql - queries to dig into undo usage
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tablespace.sql - queries to manage tablespace sizes

Diff for: ‎SSD.sql

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-- Find segments with most read operations, and hopefully relatively few writes
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-- These are good candidates for placing on SSD storage
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WITH segment_stats
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AS (SELECT ss.owner || '.' || ss.object_name
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|| DECODE (ss.subobject_name,NULL, '',
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'(' || ss.subobject_name || ')') segment_name,
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ss.object_type,
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SUM ( CASE WHEN statistic_name LIKE 'physical reads%'
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THEN VALUE ELSE 0 END) reads,
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SUM ( CASE WHEN statistic_name LIKE 'physical writes%'
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THEN VALUE ELSE 0 END) writes,
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ROUND (SUM (bytes) / 1048576) mb
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FROM v$segment_statistics ss
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JOIN dba_segments s
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ON (s.owner = ss.owner AND s.segment_name = ss.object_name
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AND NVL (ss.subobject_name, 'x') =NVL (s.partition_name, 'x'))
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WHERE statistic_name LIKE 'physical reads%'
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OR statistic_name LIKE 'physical writes%'
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GROUP BY ss.owner,ss.object_name,ss.subobject_name,ss.object_type)
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SELECT segment_name, object_type, reads,writes,
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ROUND (reads * 100 / SUM (reads) OVER (), 2) pct_reads,
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ROUND (writes * 100 / SUM (writes) OVER (), 2) pct_writes,
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mb FROM segment_stats
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ORDER BY reads DESC
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-- find segments with full scans
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-- These are not ideal for placing on SSD storage
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col segment_name format a60
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select
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owner || '.' || object_name || DECODE (subobject_name,NULL, '','(' || subobject_name || ')') segment_name,object_type,
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value scans
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from
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V$segment_statistics
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where
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statistic_name = 'segment scans'
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and value != 0
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order by
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value desc
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;

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