In AWR report, what is "Batched IO (bound) vector count" ?

Hi All,
Oracle v11.2, Linux, 64bit.
I am looking at AWR report, in section, Instance Activity Stats.
First stat is "Batched IO (bound) vector count". What does that stand for? I tried searching in documentation.
Actually, in Instance Activity Stats, first few lines are, Batched IO (bound) vector count, Batched IO (full) vector count, Batched IO (space) vector count, Batched IO block miss count, Batched IO double miss count. Where can I find the details/meaning for these statistics ??
Thanks in advance

This is an idle wait event. For the description of it, see below
http://download.oracle.com/docs/cd/B19306_01/server.102/b14237/waitevents003.htm#sthref3197
Tanel has written good posts for the same.Check them out as well,
http://blog.tanelpoder.com/2008/02/07/sqlnet-message-to-client-wait-gotcha/
http://blog.tanelpoder.com/2008/02/10/sqlnet-message-to-client-vs-sqlnet-more-data-to-client/
HTH
Aman....
Edited by: Aman.... on Nov 3, 2008 11:02 PM added Tanel's links.

Similar Messages

What to Check in AWR Report

Hi All,
Not very much experienced in performance tunning that why need your help, i generate AWR report for different times what to check, i started with top 5 events and trying to understand the portion of the report. Can anyone help me to understand the same
In case if AWR requires for the 3 snap shot i will provide the same

Hi,
If you have a performance issue on your system look for causes of that performance issue in the AWR. eg. compare the awr report for the period with bad performance with that of a one taken when performance was good. AWR taken during bad time would have "things" that weren't in the awr taken when performance was good or have "high values" for some "things". Start from that point and drill down.
If you don't have performance issues then confirm everything is running as it shoud be. Compare several awr reports and there shoulnd't me "anything" out of the ordinary.
You can start with
Instance Efficiency Percentages (Target 100%)
Top 5 Timed Foreground Events
Time Model Statistics
There are no hard and fast rules as to how you go about interpreting an awr. It depends on type of problem you have, your system, your applicaiton, time of day etc.
http://www.dba-oracle.com/t_rac_statspack_awr_report_tips.htm

What is measure of "Waits" value in AWR Report?

Event
Waits
%Time -outs
Total Wait Time (s)
Avg wait (ms)
Waits /txn
SQL*Net more data from dblink
406,747
466
1
184.13
db file scattered read
28,659
330
12
12.97
SQL*Net message from dblink
30,115
254
8
13.63
log file parallel write
21,021
177
8
9.52
Hi All
    As below example, I have question What is measure of "Waits" value in "Wait Events" section in AWR report?
    Because "Waits" value is high but "Total Wait Time (s)" is low. example "SQL*Net message from dblink" has 30,115 "Waits" but "Total Wait Time (s)" less than "db file scattered read" has 28,659 "Waits".
    Could you please explain more about "Waits" value?
Thank you
Hiko

taohiko wrote:
Event
Waits
%Time -outs
Total Wait Time (s)
Avg wait (ms)
Waits /txn
SQL*Net more data from dblink
406,747
466
1
184.13
db file scattered read
28,659
330
12
12.97
SQL*Net message from dblink
30,115
254
8
13.63
log file parallel write
21,021
177
8
9.52
Hi All
    As below example, I have question What is measure of "Waits" value in "Wait Events" section in AWR report?
It's simply a count ... of the number of times the system had to "WAIT" on the specified event.
    Because "Waits" value is high but "Total Wait Time (s)" is low. example "SQL*Net message from dblink" has 30,115 "Waits" but "Total Wait Time (s)" less than "db file scattered read" has 28,659 "Waits".
Look at "AVG wait time".    In the one case, there were fewer occurrences of the event, but the average wait time per event was greater.
If I buy 3 hamburgers and pay $1000 each
or I buy 500 hamburgers and pay $1.00 each,
why do 3 hamburgers cost more than 500 hamburgers?
    Could you please explain more about "Waits" value?
"Waits" is the number of times the system had to wait on the named event, during the sampling period.
"Total Wait Time" is the total time (measured in seconds) spent waiting on all occurrences of the specified event, during the sampling period.
"Avg" wait" is the average time (measured in milliseconds) spent on each occurrence of the specified event, during the sampling period.
It seems pretty self-evident. You count how many times something happens (waits), you measure the time spent doing that something (total wait time), and you divide the total time spent (total wait time) by the number of times it happened (waits) to find out the average time spent on each occurrence of that something.
Thank you
Hiko

How to use batch file in window to send out Oracle AWR report automatically

Dear All
Please help me to write batch script as scheduler in windows to send out Oracle AWR report every 2 hours automatically
I have database 10.2.0.3 , its on windows platform .
Thanks in advance

846671 wrote:
Dear All
Please help me to write batch script as scheduler in windows to send out Oracle AWR report every 2 hours automatically
I have database 10.2.0.3 , its on windows platform .
Thanks in advancewhat utility do you use to "send out" Oracle AWR report ?

DB CPU event in top 5 of AWR report question

The top 5 foreground event in my AWR report is as follows. I am trying to understand if my db(system) is CPU bound.The elapsed time is 30 minutes and DB time is 675 in the load profile section. There are 32 cpus. The available CPU is 30*60*32 => 57600. The DB CPU below is 35227. This is about 61 %. At what percentage of DB CPU do I consider my system is CPU bound ?. Also I want to make sure the method I arrived at this is correct or not. Please help. Event Waits Time(s) Avg wait (ms) % DB time Wait Class DB CPU 35,277 87.12 DBMS_LDAP: LDAP operation 3,683 10,061 366 9.1 Other db file sequential read 233,584 933 4 2.3 User I/O read by other session 41,686 190 5 0.47 User I/O log file sync 70,932 166 2 0.41 Commit

Why does the top 5 foreground indicate 87 % below the % DB Time column ? While my calculation shows 61 %, Which is correct for the interpretation if the system is CPU bound. The 2 lines of top 5 events are as follows
Event
Waits
Time(s)
Avg wait (ms)
% DB time
Wait Class
DB CPU
35,277
87.12

Identify high workload from awr report

Hi All,
Yesterday, our well-tuned the batch ran very slowly. Most of jobs ran for 30 mins that usually cost 15-20mins. And the colletion of statistics took much longer than before.
After reading the awr report, I noticed that all top SQLs didn't belong to our batch. Most of them are MV refreshing and bitmap index building.
So I think it is this unexpected high workload who is the culprit of the bad performance. But I want to know which section of awr report can show this or let management accept it?
Best regards,
Leon

HI,
And I noticed the CPU section in awr looks like:
Host CPU (CPUs: 24 Cores: 12 Sockets: 6)
Load Average Begin Load Average End %User %System %WIO %Idle
1.07 2.22 73.4 8.8 0.9 17.8
Instance CPU
%Total CPU %Busy CPU %DB time waiting for CPU (Resource Manager)
67.9 82.7 0.0 It seems that CPU is not 100% busy. So can I say the workload is not CPU-bound?
My RAC is 11.1 and have 4 nodes. But the service I used for my batch just contains two nodes.
In light of this, does the CPUs:24 here mean the total CPUs for all 4 nodes or the CPUs for this service (2 nodes)?
Best regards,
Leon

Diff b/w snapshot baselines and AWR reports

Hi All,
Can anyone tell what is the difference b/w snapshot baselines and AWR reports. I have gone through couple of articles and i feel both are same, however given different names.
Am I correct?
Thanks

AWR report is a report comparing the pair of snapshots and thus giving you the details of what has happened between that inerval!
The baselines is that "interesting time period" which you define telling to oracle and is used by oracle to compute the sql response tiime of your db with it in the subsequent timings. So both are completely different actually!
HTH
Aman....

AWR Report - no data!!

Oracle Version: 11.1.0.7 64x
OS Version: Windows 2008 Server 64x
Hi There,
We're just trying to generate a awr report for one of our databases and the report is coming out with no data.
statistics_level parameter is set to "TYPICAL"; any idea to what's going on please?
Thanks
SQL>
SQL> @?/rdbms/admin/awrrpt.sql
Current Instance
~~~~~~~~~~~~~~~~
   DB Id    DB Name      Inst Num Instance
1391811405 WEBTST              1 webtst
Specify the Report Type
~~~~~~~~~~~~~~~~~~~~~~~
Would you like an HTML report, or a plain text report?
Enter 'html' for an HTML report, or 'text' for plain text
Defaults to 'html'
Enter value for report_type: text
Type Specified: text
Instances in this Workload Repository schema
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   DB Id     Inst Num DB Name      Instance     Host
* 1391811405        1 WEBTST       webtst       WEBDBTST
Using 1391811405 for database Id
Using          1 for instance number
Specify the number of days of snapshots to choose from
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Entering the number of days (n) will result in the most recent
(n) days of snapshots being listed. Pressing <return> without
specifying a number lists all completed snapshots.
Enter value for num_days: 1
Listing the last day's Completed Snapshots
                                                        Snap
Instance     DB Name        Snap Id    Snap Started    Level
webtst       WEBTST           43973 12 May 2011 00:00      1
                              43974 12 May 2011 01:00      1
                              43975 12 May 2011 02:00      1
                              43976 12 May 2011 03:00      1
                              43977 12 May 2011 04:00      1
                              43978 12 May 2011 05:00      1
                              43979 12 May 2011 06:00      1
                              43980 12 May 2011 07:00      1
                              43981 12 May 2011 08:00      1
                              43982 12 May 2011 09:00      1
                              43983 12 May 2011 10:00      1
                              43984 12 May 2011 11:00      1
                              43985 12 May 2011 11:02      1
Specify the Begin and End Snapshot Ids
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Enter value for begin_snap: 43984
Begin Snapshot Id specified: 43984
Enter value for end_snap: 43985
End   Snapshot Id specified: 43985
Specify the Report Name
~~~~~~~~~~~~~~~~~~~~~~~
The default report file name is awrrpt_1_43984_43985.txt. To use this name,
press <return> to continue, otherwise enter an alternative.
Enter value for report_name:
Using the report name awrrpt_1_43984_43985.txt
WARNING (-20023)
ORA-20023: Missing start and end values for time model stat: parse time elapsed
WARNING (-20023)
ORA-20023: Missing start and end values for time model stat: DB CPU
WARNING (-20016)
ORA-20016: Missing value for SGASTAT: free memory
WARNING (-20016)
ORA-20016: Missing value for SGASTAT: free memory
WARNING (-20009)
ORA-20009: Missing System Statistic logons current
WARNING (-20009)
ORA-20009: Missing System Statistic logons current
WARNING (-20009)
ORA-20009: Missing System Statistic opened cursors current
WARNING (-20009)
ORA-20009: Missing System Statistic opened cursors current
WARNING (-20023)
ORA-20023: Missing start and end values for time model stat: sql execute elapsed
WARNING (-20008)
ORA-20008: Missing Init.ora parameter undo_management
WARNING (-20008)
ORA-20008: Missing Init.ora parameter db_block_size
WARNING (-20016)
ORA-20016: Missing value for SGASTAT: log_buffer
WARNING (-20023)
ORA-20023: Missing start and end values for time model stat: DB time
WARNING (-20008)
ORA-20008: Missing Init.ora parameter timed_statistics
WARNING (-20008)
ORA-20008: Missing Init.ora parameter timed_statistics
WARNING (-20008)
ORA-20008: Missing Init.ora parameter statistics_level
WARNING (-20008)
ORA-20008: Missing Init.ora parameter statistics_level
WARNING (-20008)
ORA-20008: Missing Init.ora parameter sga_target
WARNING (-20008)
ORA-20008: Missing Init.ora parameter pga_aggregate_target
WARNING (-20023)
ORA-20023: Missing start and end values for time model stat: background cpu time
WARNING (-20023)
ORA-20023: Missing start and end values for time model stat: background elapsed
WARNING (-20023)
ORA-20023: Missing start and end values for time model stat: connection manageme
WARNING (-20016)
ORA-20016: Missing value for SGASTAT: buffer_cache
WARNING (-20016)
ORA-20016: Missing value for SGASTAT: buffer_cache
WARNING: Since the DB Time is less than one second, there was
         minimal foreground activity in the snapshot period.
         Some of the percentage values will be invalid.
WORKLOAD REPOSITORY report for
DB Name         DB Id    Instance     Inst Num Startup Time    Release     RAC
WEBTST        1391811405 webtst              1 29-Apr-11 04:50 11.1.0.7.0 NO
Host Name        Platform                         CPUs Cores Sockets Memory(GB)
WEBDBTST         Microsoft Windows x86 64-bit                           .00
              Snap Id      Snap Time      Sessions Curs/Sess
Begin Snap:     43984 12-May-11 11:00:01
End Snap:     43985 12-May-11 11:02:00
   Elapsed:                1.98 (mins)
   DB Time:                0.00 (mins)
Cache Sizes                       Begin        End
~~~~~~~~~~~                  ---------- ----------
               Buffer Cache:MM Std Block Size:K
           Shared Pool Size:         0M         0M      Log Buffer:K
ORA-01403: no data found
Error encountered in Report Summary
Continuing to Report Sections
Time Model Statistics              DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Operating System Statistics         DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Operating System Statistics - DetailDB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Foreground Wait Class               DB/Inst: WEBTST/webtst Snaps: 43984-43985
-> s - second, ms - millisecond -    1000th of a second
-> ordered by wait time desc, waits desc
-> %Timeouts: value of 0 indicates value was < .5%. Value of null is truly 0
-> Captured Time accounts for % of Total DB time            .00 (s)
-> Total FG Wait Time:    (s) DB CPU time:            .00 (s)
                                                                  Avg
                                      %Time       Total Wait     wait
Wait Class                      Waits -outs         Time (s)     (ms) %DB time
DB CPU                                                     0              100.0
Foreground Wait Events             DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Background Wait Events             DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Wait Event Histogram               DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Service Statistics                 DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Service Wait Class Stats            DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
SQL ordered by Elapsed Time        DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
SQL ordered by CPU Time            DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
SQL ordered by Gets                DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
SQL ordered by Reads               DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
SQL ordered by Executions          DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
SQL ordered by Parse Calls         DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
SQL ordered by Sharable Memory     DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
SQL ordered by Version Count       DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Instance Activity Stats            DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Instance Activity Stats - Absolute ValuesDB/Inst: WEBTST/webtst Snaps: 43984
                  No data exists for this section of the report.
Instance Activity Stats - Thread ActivityDB/Inst: WEBTST/webtst Snaps: 43984-
                  No data exists for this section of the report.
Tablespace IO Stats                DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
File IO Stats                      DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Buffer Pool Statistics             DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Instance Recovery Stats             DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Buffer Pool Advisory                       DB/Inst: WEBTST/webtst Snap: 43985
                  No data exists for this section of the report.
PGA Aggr Summary                   DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
PGA Aggr Target Stats               DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
PGA Aggr Target Histogram           DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
PGA Memory Advisory                        DB/Inst: WEBTST/webtst Snap: 43985
                  No data exists for this section of the report.
Shared Pool Advisory                      DB/Inst: WEBTST/webtst Snap: 43985
                  No data exists for this section of the report.
SGA Target Advisory                        DB/Inst: WEBTST/webtst Snap: 43985
                  No data exists for this section of the report.
Streams Pool Advisory                      DB/Inst: WEBTST/webtst Snap: 43985
                  No data exists for this section of the report.
Java Pool Advisory                         DB/Inst: WEBTST/webtst Snap: 43985
                  No data exists for this section of the report.
Buffer Wait Statistics              DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Enqueue Activity                   DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Undo Segment Summary               DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Undo Segment Stats                  DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Latch Activity                     DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Latch Sleep Breakdown              DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Latch Miss Sources                 DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Mutex Sleep Summary                 DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Parent Latch Statistics            DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Child Latch Statistics              DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Segments by Row Lock Waits         DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Segments by ITL Waits               DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Segments by Buffer Busy Waits       DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Dictionary Cache Stats             DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Library Cache Activity              DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Memory Dynamic Components          DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Memory Resize Operations Summary    DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Memory Resize Ops                   DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Process Memory Summary             DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
sum
SGA breakdown difference            DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Streams CPU/IO Usage               DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Streams Capture                     DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Streams Apply                       DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Buffered Queues                     DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Buffered Subscribers                DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Rule Set                            DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Persistent Queues                   DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Persistent Subscribers              DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
Resource Limit Stats                      DB/Inst: WEBTST/webtst Snap: 43985
                  No data exists for this section of the report.
init.ora Parameters                DB/Inst: WEBTST/webtst Snaps: 43984-43985
                  No data exists for this section of the report.
End of Report

SQL> show parameter statistics
NAME                                 TYPE        VALUE
optimizer_use_pending_statistics     boolean     FALSE
statistics_level                     string      TYPICAL
timed_os_statistics                  integer     0
timed_statistics                     boolean     TRUE
SQL>
SQL> SELECT statistics_name,
2             session_status,
3             system_status,
4             activation_level,
5             session_settable
6      FROM   v$statistics_level
7      ORDER BY statistics_name;
STATISTICS_NAME                                                  SESSION_ SYSTEM_S ACTIVAT SES
Active Session History                                           ENABLED ENABLED TYPICAL NO
Adaptive Thresholds Enabled                                      ENABLED ENABLED TYPICAL NO
Automated Maintenance Tasks                                      ENABLED ENABLED TYPICAL NO
Bind Data Capture                                                ENABLED ENABLED TYPICAL NO
Buffer Cache Advice                                              ENABLED ENABLED TYPICAL NO
Global Cache Statistics                                          ENABLED ENABLED TYPICAL NO
Longops Statistics                                               ENABLED ENABLED TYPICAL NO
MTTR Advice                                                      DISABLED DISABLED TYPICAL NO
Modification Monitoring                                          ENABLED ENABLED TYPICAL NO
PGA Advice                                                       ENABLED ENABLED TYPICAL NO
Plan Execution Sampling                                          ENABLED ENABLED TYPICAL YES
Plan Execution Statistics                                        DISABLED DISABLED ALL     YES
SQL Monitoring                                                   ENABLED ENABLED TYPICAL YES
Segment Level Statistics                                         ENABLED ENABLED TYPICAL NO
Shared Pool Advice                                               ENABLED ENABLED TYPICAL NO
Streams Pool Advice                                              ENABLED ENABLED TYPICAL NO
Threshold-based Alerts                                           ENABLED ENABLED TYPICAL NO
Time Model Events                                                ENABLED ENABLED TYPICAL YES
Timed OS Statistics                                              DISABLED DISABLED ALL     YES
Timed Statistics                                                 ENABLED ENABLED TYPICAL YES
Ultrafast Latch Statistics                                       ENABLED ENABLED TYPICAL NO
Undo Advisor, Alerts and Fast Ramp up                            ENABLED ENABLED TYPICAL NO
V$IOSTAT_* statistics                                            ENABLED ENABLED TYPICAL NO
23 rows selected.
SQL>Thanks
Edited by: rsar001 on May 12, 2011 11:33 AM

How can I have a collective AWR report for RAC database in 10gR2 and 11gR1?

Plz correct me here
awrrpt.sql takes the snapshot at the instance level and incase we have 5 instances we have to take 5 awr reports for a particular period.correct???
If above is true ,any wayout to collect a single collective AWR report for RAC database which includes information on all the instances in Oracle 10g R2 or 11gR1 ?
Thanks in advance
Gagan

I have never come across a way for this. though I can n't say it is not there.
But I guess it may not be feasible too becuase as we know the current AWR report contains data which is specific for one instance.
Various hit ratios, top events, instance effeciency reports.... what not ..
It would be really nice to see something is a new format where it lists values from each instance in a single report.. I guess such a thing Does not exiist as of now.

Shell script for Automatic Awr Report

Hi Good Morning,
I have a requirement to generate the AWR report daily between (10AM - 06PM , 10AM - 01PM , 01PM - 10PM) . I have the below script for this . But the issue is this script is working only when i run it two times and before running i have to delete snap_list.lst file. Please let me know what is the problem in this script and how to resolve it.
Script :
dt=`date +%d%m%Y`
cd /orabkp/awr_report
chmod 777 *
rm -rf snap_list.lst
touch snap_list.lst
#rm -rf snap_list.lst
#rm -rf snap_list.lst
sqlplus -s " /as sysdba " <<EOF > snap_list.lst
host sleep 10
@/oracle/scripts/cron_scripts/rpt1.sql;
@?/rdbms/admin/awrrpt.sql
HTML
1
`cat snap_list.lst | grep "10:0" | awk '{print $1}'`
`cat snap_list.lst | grep "13:0" | awk '{print $1}'`
awrrpt\_$dt\_10AM\-01PM.html
prompt 2
@?/rdbms/admin/awrrpt.sql
HTML
1
`cat snap_list.lst | grep "13:0" | awk '{print $1}'`
`cat snap_list.lst | grep "18:0" | awk '{print $1}'`
awrrpt\_$dt\_01PM\-06PM.html
@?/rdbms/admin/awrrpt.sql
HTML
1
`cat snap_list.lst | grep "10:0" | awk '{print $1}'`
`cat snap_list.lst | grep "18:0" | awk '{print $1}'`
awrrpt\_$dt\_10AM\-06PM.html
@?/rdbms/admin/addmrpt.sql
`cat snap_list.lst | grep "06:0" | awk '{print $1}'`
`cat snap_list.lst | grep "12:0" | awk '{print $1}'`
ADDM_REPORT\_$dt\_10AM\-06PM.txt
EOF
exit
cat /oracle/scripts/cron_scripts/rpt1.sql
host echo 1
host sleep 10
@?/rdbms/admin/awrrpt.sql
HTML
1
`cat snap_list.lst | grep "10:0" | awk '{print $1}'`
`cat snap_list.lst | grep "13:0" | awk '{print $1}'`
awrrpt\_$dt\_10AM\-01PM.html
Regards
Rajasekar

Hi,
Modify & Try this script used for rac awr ..
#!/bin/ksh
set -x
ORACLE_SID=DBSID
ORACLE_HOME=/u01/app/ora11g/product/11.2.0/db_1
export ORACLE_HOME
TERM=vt100
export TERM
PATH=/usr/bin:/etc:/usr/sbin:/usr/ucb:/usr/local/bin:/usr/bin/X11:/bin:/sbin:.
PATH=$ORACLE_HOME/bin:$PATH
export DT=`date '+%d_%b_%Y_%HH_%MM'`
export ORACLE_BASE ORACLE_SID ORACLE_HOME PATH DT
echo $DT
MAIL="[email protected]"
CMAIL="[email protected]"
AWRR="/u01/DBA_Scripts/AWR_REPO"
sqlplus -s "/ as sysdba"<<EOFSQL
set head off
set feed off
spool /tmp/bsnap.lst
select max(SNAP_ID)- 3 from dba_hist_snapshot;
spool off
spool /tmp/esnap.lst
select max(SNAP_ID) from dba_hist_snapshot;
spool off
spool /tmp/iname.lst
select instance_name from v\$instance;
spool off
spool /tmp/dname.lst
select database_name from v\$database;
spool off
spool /tmp/inum.lst
select instance_number from v\$instance;
spool off
spool /tmp/dbid.lst
select dbid from v\$database;
spool off
EOFSQL
BSNAP=`cat /tmp/bsnap.lst | tail -1 | awk '{ print $1}'`;export BSNAP
ESNAP=`cat /tmp/esnap.lst | tail -1 | awk '{ print $1}'`;export ESNAP
INAME=`cat /tmp/iname.lst | tail -1 | awk '{ print $1}'`;export INAME
DNAME=`cat /tmp/dname.lst | tail -1 | awk '{ print $1}'`;export DNAME
INUM=`cat /tmp/inum.lst | tail -1 | awk '{ print $1}'`;export INUM
DID=`cat /tmp/dbid.lst| tail -1 | awk '{ print $1}'`;export DID
echo "Begin Snap : $BSNAP"
echo "End Snap    : $ESNAP"
#echo "InstanceName: $INAME"
echo "DB Name     : $DNAME"
#echo "InstanceId : $INUM"
echo "DB ID       : $DID"
sqlplus -s "/ as sysdba"<<EOFSQL
      define inst_num     = $INUM;
      define num_days     = 12;
      define inst_name    = 'ALL';
      define db_name      = '$DNAME';
      define dbid         = $DID;
      define begin_snap   = $BSNAP;
      define end_snap     = $ESNAP;
      define report_type = 'html';
      define report_name = $AWRR/Awr_report_$DT.html
      @@?/rdbms/admin/awrgrpti
EOFSQL
cat /u01/DBA_Scripts/mail_body.txt | mailx -a $AWRR/Awr_report_$DT.html -c $CMAIL -s "DB Report - DB " $MAILThanks,
Ajay More
http://www.moreajays.com

User I/O and db file parallel read is high in AWR report

Hi,
We have one performance issue during a job execution.
From the awr report we have identified one query with a table having millions of records causing problems and then we had also fine tuned that query by changing it's code and by using the optmizer hints. It is being executed in plsql batches. After fine tuning, On the first batch execution(first 5000 records) the query is taking only 5 mins, but on the consecutive batches it is consuming more time( more than 30 mins).
From the awr report I got the statistics as
Release : 11.2.0.2.0
Instance Efficiency Percentages (Target 100%)
Buffer Nowait %: 100.00 Redo NoWait %: 100.00
Buffer Hit %: 85.44 In-memory Sort %: 99.98
Library Hit %: 99.76 Soft Parse %: 99.15
Execute to Parse %: 88.91 Latch Hit %: 100.00
Parse CPU to Parse Elapsd %: 87.32 % Non-Parse CPU: 98.65
The buffer hit % is good. On each batch execution it is taking different set of records.
Top 5 Timed Foreground Events
Event Waits Time(s) Avg wait (ms) % DB time Wait Class
db file parallel read 120,485 42,540 353 89.60 User I/O
DB CPU 3,794 7.99
db file sequential read 145,074 606 4 1.28 User I/O
db file scattered read 70,030 556 8 1.17 User I/O
direct path write temp 12,423 21 2 0.04 User I/O
So the I/O is our main concern since that query contains one table with millions of records.
Host CPU (CPUs: 24 Cores: 24 Sockets: 4)
Load Average Begin Load Average End %User %System %WIO %Idle
1.40 1.45 0.6 0.3 3.7 99.0
Load is also normal.
From the Time model statistics , sql execute elapsed time is 98.27% of db time and only 7.99% is that of DB CPU.
Memory Statistics
Begin End
Host Mem (MB): 64,318.0 64,318.0
SGA use (MB): 30,720.0 30,720.0
PGA use (MB): 488.2 497.1
% Host Mem used for SGA+PGA: 48.52 48.54
Both the size of sga_max_size and sga_target are 32,212,254,720(32gb) bytes and that of
pga_aggregate target is 629,145,600(600mb)
from this it is evident that the memory is still available(so increase in memory size is not an option).
The sql statistics for that query shows like that
Elapsed Time (s) Executions Elapsed Time per Exec (s) %Total %CPU %IO SQL Id SQL Text
44,950.03 55 817.27 94.67 6.99 94.72 79dgmrxh4kv74 SELECT /*+ index(cdr_data cdr_...
I can't understand whether the problem is in the database side or with the query?
If the problem is with the query, then how it has been executed in 5 mins for the first batch ?
(all the batches are having 5000 records each).
And how can we reduce the db file parallel read ?
Your valuable advice will be greatly appreciated.
Thanks in advance
Manoj Kumar N

"db file parallel read" is likely to be associated with something like index prefetching.
See:
http://www.freelists.org/post/oracle-l/RE-Calculating-LIOs,11
http://aprakash.wordpress.com/2012/05/29/index-range-scan-and-db-file-scattered-read-as-session-wait-event/
http://jonathanlewis.wordpress.com/2006/12/15/index-operations/
Tune the SQL.
Review the execution plan.
Check whether the statistics are accurate.
Review whether the index hint (and others that we can't see) is appropriate.

Report depending on Batch Status.

Hi PP Gurus,
We want to generate a report wherein whatever Batches put on Hold (moved to Restricted use through transaction code MSC2N) along with quantity, cost of material, date on which it's put on hold, will be other contents. What possible could be done in this regard? I mean we're haivg MCH1 table for batches, MSEG as well, what logic will serve the purpose?
Thanks & Regards,
Abu Arbab

Dear,
Batch Stocks Table MCHB
Batch Stocks: History Table MCHBH
Fields are
    MATNR
    CHARG
    WERKS
    LIFNR
    ZUSTD
    HSDAT
LOBM_ZUSTD Status of batch charctrestics then you will get waht you are asking.
These characteristic have associate the tables MCHA and MCH1
Hope clear to you.
Regards,
R.Brahmankar

Help on using AWR report

we use ORACLE 11.1.0.7. We have couple of processes that run for about 2 to 3 hours which are scheduled to run after 6 pm. When these processes run, currently users are not allowed to access the system . So last week we ran these processes with 30 to 40 users in a test instance, basically reading data.I have preserved the AWR snapshot during these processes. we have the preserved the AWR snapshots during the processes when users are no allowed in the system. I believe we can compare two periods in Grid. I would like to know what information would be helpful from this report?

I would like to know what information would be helpful from this report?That would entirely depend on why you generated the AWR reports in first place - what was your motive, what were you looking for, were there any major wait events etc.

Enq: TX - row lock contention in AWR reports

Dears,
One of my friends asked me to give him a help on analyzing a performance problem they are experimenting from time to time. First of all I am sorry to tell you that he didn’t gave me a lot of information. I will share with you all what I have been sent and would like to have your precious advice according to the available information.
It is a third party software installed on oracle data base 10.2.0.4.0. He said that from time to time the application hangs. He sends me an AWR reports supplied by the local DBA. Unfortunately, the local DBA send only the AWR information he thinks are most important to be looked at (he did not include the load profile and the instance efficiency Percentages part in this AWR for example).
Here below is the available information I can share with you
                                                                         Snap time                                       sessions        cursors/session
Begin Snap        09-mars-11 08:00:03              31                     6.5
End Snap          09-mars-11 08:39:49              41                     9.8
Elapsed           39.77 (mins)
DB Time           536.65(mins)
Top 5 Timed Events
Event                          Waits   Time(s)    Avg Wait(ms)    % Total Call Time     Wait Class
enq: TX - row lock contention 8,468    25,344       2,993            78.7             Application
read by other session          714,628   4,604         6               14.3             User I/O
db file sequential read        323,264 1,977         6               6.1              User I/O
CPU time                                 171                          .5
db file scattered read          1,885   49           26               .2               User I/OThe AWR reports presents also the following SQL statement as the top SQL of its ‘’SQL ordered by Elapsed Time’’ part
UPDATE xxxx.table1
   SET col1 = :1,
       col2 = :2,
       col3 = :3,
       col4 = :4,
WHERE ID = :13
AND colx = :14;And the following sql at its “SQL ordered by Reads’ part
SELECT t1.*
FROM xxxx.table1 t1
LEFT OUTER JOIN xxxx.table2 t2
       ON t1.id = t2.id
LEFT OUTER JOIN xxxx.table3 t3
       ON t1.id = t3.id
LEFT OUTER JOIN xxxx.table4 t4
       ON t1.id = t4.id
WHERE t1.col1 = :1
AND   t1.col2 IN (:2,:3, :4);And finally in the Segments by Row Lock Waits part of the AWR I have this:
Owner      tablespace name    object name   object type   row lock waits   %of capture
xxxx          xxxx          table1         TABLE          54       100    There are no bitmap indexes on this OLTP data base. There are no unindexed foreign keys and it seems that there are no selects done over a dblink.
I am waiting to have the table table1 script and its indexes
Given those information I think that the locking problem is due to this update on table table1 which is not followed immediately by a commit or a rollback. But, instead, several selects that might be taking a long time are done before reaching the commit that ends the lock on the table table1
What do you think about the possible reason of this lock?
Thanks in advance
Mohamed Houri

Dears,
I did get the suspected query and asked for its several explain plans thanks to the dbms_xplan.display_awr. The most important thing to point out is that the last where clause of this query seems to be dynamically filled-up
SELECT t1.*
FROM xxxx.table1 t1
LEFT OUTER JOIN xxxx.table2 t2
       ON t1.id = t2.id
LEFT OUTER JOIN xxxx.table3 t3
       ON t1.id = t3.id
LEFT OUTER JOIN xxxx.table4 t4
       ON t1.id = t4.id
WHERE t1.col1 = :1
AND   t1.col2 in (:2 , :3 , :4 , :5 , :6 , :7 , :8 )
| Id | Operation                      | Name                    | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT               |                         |       |       |    14 (100)|          |
|   1 | NESTED LOOPS OUTER            |                         |     1 |   280 |    14   (0)| 00:00:01 |
|   2 |   NESTED LOOPS OUTER           |                         |     1 |   226 |     9   (0)| 00:00:01 |
|   3 |    NESTED LOOPS OUTER          |                         |     1 |   216 |     6   (0)| 00:00:01 |
|   4 |     TABLE ACCESS BY INDEX ROWID| TABLE1                  |     1 |   141 |     4   (0)| 00:00:01 |
|   5 |      INDEX RANGE SCAN          | SYS_C0010893            |     1 |       |     3   (0)| 00:00:01 |
|   6 |     TABLE ACCESS BY INDEX ROWID| TABLE2                  |     1 |    75 |     2   (0)| 00:00:01 |
|   7 |      INDEX UNIQUE SCAN         | SYS_C0010774            |     1 |       |     1   (0)| 00:00:01 |
|   8 |    INDEX RANGE SCAN            | SYS_C0010896            |     3 |    30 |     3   (0)| 00:00:01 |
|   9 |   TABLE ACCESS BY INDEX ROWID | TABLE3                  |    11 |   594 |     5   (0)| 00:00:01 |
| 10 |    INDEX RANGE SCAN            | SYS_C0010910            |    11 |       |     3   (0)| 00:00:01 |
SELECT t1.*
FROM xxxx.table1 t1
LEFT OUTER JOIN xxxx.table2 t2
       ON t1.id = t2.id
LEFT OUTER JOIN xxxx.table3 t3
       ON t1.id = t3.id
LEFT OUTER JOIN xxxx.table4 t4
       ON t1.id = t4.id
WHERE t1.col1 = :1
AND   t1.col2 in (:2 , :3 , :4 , :5 , :6 , :7 , :8 , :9 , :10 , :11 , :12 , :13 , :14 , :15 , :16 ,
:17 , :18 , :19 , :20 , :21 , :22 , :23 , :24 , :25 , :26 , :27 , :28 , :29 , :30 , :31 , :32 ,
:33 , :34 , :35 , :36 , :37 , :38 , :39 , :40 , :41 , :42 , :43 , :44 , :45 , :46 , :47 , :48 ,
:251 , :252 , :253 , :254 , :255 , :256 , :257 ) ;
| Id | Operation                       | Name                    | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT                |                         |       |       | 5943 (100)|          |
|   1 | NESTED LOOPS OUTER             |                         | 9210 | 2536K| 5943   (1)| 00:01:12 |
|   2 |   NESTED LOOPS OUTER            |                         |   885 |   195K| 1784   (0)| 00:00:22 |
|   3 |    NESTED LOOPS OUTER           |                         |   255 | 55080 | 1019   (0)| 00:00:13 |
|   4 |     INLIST ITERATOR             |                         |       |       |            |          |
|   5 |      TABLE ACCESS BY INDEX ROWID| TABLE1                  |   255 | 35955 |   509   (0)| 00:00:07 |
|   6 |       INDEX UNIQUE SCAN         | SYS_C0010893            |   255 |       |   258   (0)| 00:00:04 |
|   7 |     TABLE ACCESS BY INDEX ROWID | TABLE2                  |     1 |    75 |     2   (0)| 00:00:01 |
|   8 |      INDEX UNIQUE SCAN          | SYS_C0010774            |     1 |       |     1   (0)| 00:00:01 |
|   9 |    INDEX RANGE SCAN             | SYS_C0010896            |     3 |    30 |     3   (0)| 00:00:01 |
| 10 |   TABLE ACCESS BY INDEX ROWID   | TABLE3                  |    10 |   560 |     5   (0)| 00:00:01 |
| 11 |    INDEX RANGE SCAN             | FK_TABLE3               |    10 |       |     3   (0)| 00:00:01 |
-----------------------------------------------------------------------------------------------------------   Suddenly there is an INLIST ITERATOR that pops up and which seems to be started 255 times and the ‘quick’ query which in normal situation (small in list) executes in less than 1 second starts now taking more than 1 minute to complete.
As far as it is a third party software, they can’t change the query.
Do you have any idea on how to solve this problem?
Here below are the optimizer parameters
SQL> show parameter optimizer
NAME                                 TYPE        VALUE
optimizer_dynamic_sampling           integer     2
optimizer_features_enable            string      10.2.0.4
optimizer_index_caching              integer     0
optimizer_index_cost_adj             integer     100
optimizer_mode                       string      ALL_ROWS
optimizer_secure_view_merging        boolean     TRUEThanks in advance
Mohamed Houri

AWR Report tuning

Hi All,
I have created AWR Report .But i can not anlayse what is the problem in that query which is taking more time to execute from that AWR report.
Can any one give me detail document of the AWR Report Events generated .So, I can analyse from that event where is the problem?
Thanks in advance.

Thanks for your reply
Plan hash value: 3677326586
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time | Pstart| Pstop |
| 0 | SELECT STATEMENT | | 3 | 537 | 8018 (1)| 00:01:37 | | |
| 1 | VIEW | VWPREPAIDBALANCEINFORMATION | 3 | 537 | 8018 (1)| 00:01:37 | | |
| 2 | SORT UNIQUE | | 3 | 926 | 8018 (67)| 00:01:37 | | |
| 3 | UNION-ALL | | | | | | | |
| 4 | HASH GROUP BY | | 1 | 252 | 2673 (1)| 00:00:33 | | |
| 5 | NESTED LOOPS SEMI | | 1 | 252 | 2671 (1)| 00:00:33 | | |
|* 6 | HASH JOIN SEMI | | 1 | 218 | 2667 (1)| 00:00:33 | | |
| 7 | PARTITION RANGE ALL | | 583 | 104K| 2035 (1)| 00:00:25 | 1 | 731 |
| 8 | TABLE ACCESS BY LOCAL INDEX ROWID | TBLCDR | 583 | 104K| 2035 (1)| 00:00:25 | 1 | 731 |
|* 9 | INDEX RANGE SCAN | IDX_ACCOUNTID_TBLCDR | 605 | | 1466 (1)| 00:00:18 | 1 | 731 |
|* 10 | TABLE ACCESS FULL | TBLTCUSTOMERPACKAGEHISTORY | 94160 | 3218K| 630 (2)| 00:00:08 | | |
|* 11 | TABLE ACCESS BY INDEX ROWID | TBLMCUSTOMERUSAGEDETAIL | 1 | 34 | 4 (0)| 00:00:01 | | |
|* 12 | INDEX RANGE SCAN | IDX_CUSTOMERID | 3 | | 2 (0)| 00:00:01 | | |
| 13 | HASH GROUP BY | | 1 | 293 | 2669 (1)| 00:00:33 | | |
| 14 | NESTED LOOPS SEMI | | 1 | 293 | 2667 (1)| 00:00:32 | | |
| 15 | NESTED LOOPS | | 1 | 259 | 2663 (1)| 00:00:32 | | |
| 16 | MERGE JOIN CARTESIAN | | 1 | 76 | 630 (2)| 00:00:08 | | |
| 17 | VIEW | index$_join$_006 | 1 | 41 | 1 (100)| 00:00:01 | | |
|* 18 | HASH JOIN | | | | | | | |
| 19 | INDEX FAST FULL SCAN | IDX_PREFIX | 1 | 41 | 0 (0)| 00:00:01 | | |
| 20 | INDEX FAST FULL SCAN | PK_DESTINATION | 1 | 41 | 0 (0)| 00:00:01 | | |
| 21 | BUFFER SORT | | 94160 | 3218K| 630 (2)| 00:00:08 | | |
| 22 | SORT UNIQUE | | 94160 | 3218K| 630 (2)| 00:00:08 | | |
|* 23 | TABLE ACCESS FULL | TBLTCUSTOMERPACKAGEHISTORY | 94160 | 3218K| 630 (2)| 00:00:08 | | |
| 24 | PARTITION RANGE ALL | | 1 | 183 | 2032 (1)| 00:00:25 | 1 | 731 |
|* 25 | TABLE ACCESS BY LOCAL INDEX ROWID | TBLCDR | 1 | 183 | 2032 (1)| 00:00:25 | 1 | 731 |
|* 26 | INDEX RANGE SCAN | IDX_CUSTOEMRID | 605 | | 1463 (1)| 00:00:18 | 1 | 731 |
|* 27 | TABLE ACCESS BY INDEX ROWID | TBLMCUSTOMERUSAGEDETAIL | 1 | 34 | 4 (0)| 00:00:01 | | |
|* 28 | INDEX RANGE SCAN | IDX_CUSTOMERID | 3 | | 2 (0)| 00:00:01 | | |
| 29 | HASH GROUP BY | | 1 | 381 | 2677 (1)| 00:00:33 | | |
|* 30 | FILTER | | | | | | | |
| 31 | NESTED LOOPS ANTI | | 1 | 381 | 2671 (1)| 00:00:33 | | |
|* 32 | HASH JOIN SEMI | | 1 | 347 | 2667 (1)| 00:00:33 | | |
| 33 | PARTITION RANGE ALL | | 583 | 177K| 2035 (1)| 00:00:25 | 1 | 731 |
| 34 | TABLE ACCESS BY LOCAL INDEX ROWID| TBLCDR | 583 | 177K| 2035 (1)| 00:00:25 | 1 | 731 |
|* 35 | INDEX RANGE SCAN | IDX_ACCOUNTID_TBLCDR | 605 | | 1466 (1)| 00:00:18 | 1 | 731 |
|* 36 | TABLE ACCESS FULL | TBLTCUSTOMERPACKAGEHISTORY | 94160 | 3218K| 630 (2)| 00:00:08 | | |
|* 37 | TABLE ACCESS BY INDEX ROWID | TBLMCUSTOMERUSAGEDETAIL | 1 | 34 | 4 (0)| 00:00:01 | | |
|* 38 | INDEX RANGE SCAN | IDX_CUSTOMERID | 3 | | 2 (0)| 00:00:01 | | |
| 39 | NESTED LOOPS | | 1 | 69 | 4 (0)| 00:00:01 | | |
| 40 | TABLE ACCESS BY INDEX ROWID | TBLMDESTINATION | 1 | 41 | 0 (0)| 00:00:01 | | |
|* 41 | INDEX UNIQUE SCAN | PK_DESTINATION | 1 | | 0 (0)| 00:00:01 | | |
|* 42 | TABLE ACCESS BY INDEX ROWID | TBLMCUSTOMERUSAGEDETAIL | 1 | 28 | 4 (0)| 00:00:01 | | |
|* 43 | INDEX RANGE SCAN | IDX_CUSTOMERID | 3 | | 2 (0)| 00:00:01 | | |
-----------------------------------------------------------------------------------------------------------------------------------------

In AWR report, what is "Batched IO (bound) vector count" ?

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