Performance of SAN AWR report

Similar Questions

• This output on AWR report mean?

  Hello.

  I'm having problems of performance with an Oracle Database EE 12.1.0.2.0 in a particular query.

  I ran an AWR report and in the ADDM section get me the following for the troubled query:

  Raison d'etre

  High level calls to execute the SELECT statement with SQL_ID

  '6a9fmtbam27fp' are responsible for 99% of the time spent on database

  the SELECT statement with SQL_ID '8uqsfw32bytvh '.

  
  

  The query that I'm having this problem is the SQL_ID '8uqsfw32bytvh '.

  I couldn't find a relationship between the SQL_ID '8uqsfw32bytvh' and '6a9fmtbam27fp '.

  
  

  Do you know guys what the ADDM meant by "call for higher level? I couldn't find information online.

  
  

  Thank you.

  Jonas
  

  This comes from data ASH - V$ ACTIVE_SESSION_HISTORY / DBA_HIST_ACTIVE_SESS_HISTORY.

  For a SQL statement running in the titles the sql entry highlights so sql called from procs, sql calling functions that execute sql, etc.

  -HIGH LEVEL SQL ID (and other useful columns as PLSQL_ENTRY_OBJECT_ID, PLSQL_ENTRY_SUBPROGRAM_ID, PLSQL_OBJECT_ID, PLSQL_SUBPROGRAM_ID)

• How to activate the keys to generate and view the AWR reports Developer SQL

  Version: 4.0.3.16

  Build: HAND - 16.84

  S/n > (sid) > Performance > AWR report viewer

  I am able to select the start and end ID, but the following buttons are disabled:

  • Entries Toggel
  • Generate the report
  • Save to file
  • Open in browser

  What needs to be done to enable these buttons?

  Hello

  After entering start Id and the Id of the end, the button "report" will be activated, and then after that the report generated (by clicking the report generate) rest buttons button is activated. As shown in the image below.

  

  Hope it will be useful.

  Kind regards

  Sanjaya

• questions about the awr report & sqlt

  Hi guys,.

  DB version: 10.2.0.5

  Need your advice.

  For my AWR report, I put the 30-day retention period. From my understanding, the information in awr report are taken from several views of dba_hist *.

  Points of view takes only those albums n intenstive SQL Statistics on resources?

  I ask this because I have a doubt. Let's say that on 18/03/2014, I detected a long SQL with sql id xxx.

  Using SQLT (such method), I can only see the historical performance of Plan (delta) for this particular SQLs 16/03, 17/03, 18/03.

  In this case, we can say that the SQLs shot only 3 days for the last 30 days? Or it can also mean that the particular SQL was not classfified at the top of the page resource n intensive 18/02 to 15/03 SQLs (probably use a better plan - for example: plan a different value)?

  Thank you

  That is right.

  Concerning

  Jonathan Lews

• Bug? : cannot execute predefined "last awr" report with the latest version of the SQL Developer

  Using sql developer before 4.x... report works fine

  Using SQL developer 4.0.0.13... report fails with ORA-01422

  using the actual query to generate awr against the same range of component snap works perfectly

  I opened a SR on the question

  Thank you

  It's always a good idea to open a SR when you are able.  I assume that you have already received a response from support.  For others I wondered about this, the question is likely related to running the report against a CCR environment, as indicated in the following bug:

  Bug 18132564 - LAST AWR REPORT FAILS WITH ORA-01422 IN CCR ENVIRONMENTS
  

  The call of the AWR report requires parameters for a DB and an ID of Instance, so that the report should run, as in earlier versions, for only the current instance, or be modified to run all instances in the cluster.

  Kind regards

  Gary

  SQL development team

  P.S.: And, in fact, a discussion prior forum - ai2 4.0-AWR and ASH giving ora-01427

  lead following bugs are connected and supposed to be fixed for SQL Developer 4.0...

  
  

  Bug 17481944 - PERFORMANCE PANELS NEED AWR/ASH/ADDM FOR RAC ENVIRONMENTS SUPPORT

  
  

  ... with the developer commenting

  I've added a number instance selection control to the various reports: ASH,.
  AWR, difference and SQL. The control is supposed to be visible when the
  connection is a RAC system, tests should a RAC.

  So if you are not on a RAC system, or are on CARS but do not see the selection number instance control, please let us know.

  Post edited by: Gary Graham

• AWR report cannot locate the bad SQLs

  DB version: 11.2.0.2
  Platform: Solaris 10
  
  In our data base RAC 2 nodes, we have patterns of 20 applications. When an application is faced with performance problems, we try to generate AWR for the period in question. But the stats (like bad SQLs) for this scheme to be buried because there is another application SQLs performing even worse.
  
  I know that we cannot create AWR report for specific patterns. But I wonder how his stats are collected in a multi-schema RAC environments that will differentiate between applications.

  But the stats (like bad SQLs) for this scheme to be buried because there is another application SQLs performing even worse.

  Since all applications run in a database and query of the other application run bad then they will be the first candidate of tunning since these are taking more resources and impact on other application requests.
  You can also generate report of ASH for module specific or customer with assistance from under the option set in report of ash.

  set target_module_name = ";
  set target_action_name = ";
  set target_client_id = ";

• ANALYSYS AWR REPORT

  Hi all, can tell me the procedure to analyze the AWR reports?

  Here is a link to some documents which will give you a good overview.
  http://www.Oracle.com/technetwork/database/focus-areas/performance/tips-perf-AWR-SQL-report-129542.PDF
  http://www.nyoug.org/presentations/2008/Sep/Ault_AWR.PDF

  Have you read through the material in the database Performance Tuning Guide?
  http://docs.Oracle.com/CD/B28359_01/server.111/b28274/AutoStat.htm#i27008

  See section 5.2 Overview of the automatic workload repository

• AWR reports

  Hi all
  
  I have a sql query that has the performance issue.
  I want to get a report of statistics AWR to check what causing the query to run slowly.
  
  This is a good procedure to collect statistics using AWR?
  
  1 create the snapshot when there is no job running in the database > exec dbms_workload_repository.create_snapshot;
  2. run the query that is problem.
  3. create another snapshot after completing the request that poses problem. OR (I should lance the second create snapshot during the execution of the query?)
  4. run awrrpti.sql
  
  
  Thank you very much

  The AWR report is the wrong tool for the job, this is a system-level report.

  For the setting of a specific sql statement, you'd better watch DBMS_XPLAN. SQL DISPLAY_CURSOR or in real time, followed through DBMS_SQLTUNE. REPORT_SQL_MONITOR.

  See also:
  http://Oracle-Randolf.blogspot.com/2011/12/extended-displaycursor-with-RowSource.html

• The AWR report.

  I received a task to read the AWR report, what do I really see in the AWR report? The report I got is 11Hours where they have a lot of data migrations. I know how to take AWR report, but I'm not really sure. What I find in report AWR to ensure that the database performs well during the migration.
  

  select * from v$version
  BANNER                                                                           
  -------------------------------------------------------------------------------- 
  Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production     
  PL/SQL Release 11.2.0.2.0 - Production                                           
  CORE     11.2.0.2.0     Production                                                         
  TNS for HPUX: Version 11.2.0.2.0 - Production                                    
  NLSRTL Version 11.2.0.2.0 - Production                                           

  An AWR report has a ton of information - covering how read all sections (and then how to answer) would mean at least a book.

  Level the most basic, however, you want to probably take a look at the events of top 5 waiting to see that the database is waiting, the time of database is average time spent vs in the header to see how busy the database, and the various statements of Top SQL by x to see the SQL statements are represented the majority of the database is waiting to see what statements could be tuned to improve performance.

  Justin

• Analysis of AWR report

  Hi all
  
  I have a database performance problem. Sometimes my database doesn't work @ all. It hangs for a long time. a lot of user concurrency, cpu, I\O and other expectations are often produce when there is a lot of data. Basically, the application get stuck because of this performance.
  
  I had a less than the interval awr report.
  
  It is here http://www.4shared.com/file/cYzYGQYG/awrrpt_1_3230_3231_charith.html
  
  can someone please tell me what I have to do on this poor performance and through this document.
  Basically, the affected areas. The speculation and suggestions...?
  
  Please give me a help guys...
  
  Thank you
  Max

  I'm not able to open your report now, but your thought process should be like this:

  (1) is your complete database slow or just a few sessions that are of high value added, taking the attention?

  (2) in the case of a complete database, generate AWR report and also to monitor statistics of the OS/IO during this interval. Recover waiting events will also help you understand why meetings are pending and it will give you an advance to the next step. For the examples, several sessions are waiting for small set of CBC, latches etc.

  (3) in the case of a few sessions, try to generate sql trace for those. It's very good point to start in such cases, you will give guilty SQLs, wait events, bind variable information etc. (talk about 10046 trace).

  In your case, it seems to lock is a problem (to be honest, it is a fat guess based on the limited commentary you provided).

  Also, try Snapper of Tanel Poder.

  Cheers, Neeraj

• ASH versus reports AWR report

  My DB is oracle10g.
  
  In enterprise manager, we can generate the report of ASH. Also, we can generate AWR report in the server through files awrrpt.sql.
  
  ASH report provides the information below.
  
  Main events
  Load profile
  Top of page SQL
  Albums of PL/SQL
  Top of page sessions
  Top of page objects/files/locks
  Activity over time
  
  Provide information below AWR reports.
  
  Summary of the report
  Wait events statistics
  SQL Statistics
  Statistics from the instance activity
  IO statistics
  Buffer Pool statistics
  Advisory statistics
  Wait statistics
  Cancel statistics
  Latch statistics
  Segment statistics
  Cache dictionary statistics
  Library Cache statistics
  Memory statistics
  Flow statistics
  Statistics on resources limit
  init.ora parameters
  
  
  My question is, under what circumstances, report of ASH can be seen and what circumstances AWR report is good to see? Any help is appreciated. Thank you

  in what circumstances, report of ASH can be seen and what circumstances AWR report is good to see? Any help is appreciated. Thank you

  Ash can help you when there is felt a sudden degradation in performance of the database.
  AWR - past historical snapshot intervals.

  AWR, stores the performance statistics of session for analysis later.
  ASH - storage is not persistent and with time, the older entries are removed to accommodate the new. They can be viewed using V$ ACTIVE_SESSION_HISTORY

  HTH
  -André

• Problem of AWR report

  Hello..
  Trying to take the awr between two snapshot report I get the following error.
  ORA-20019: Database/Instance 976214629/1A was revived during the specified interval instant 26982-27006 ORA-06512: at "SYS." DBMS_SWRF_REPORT_INTERNAL', line 9875
  ORA-06512: at "SYS." DBMS_SWRF_REPORT_INTERNAL', line 1226
  ORA-06512: at "SYS." DBMS_WORKLOAD_REPOSITORY', line 915 ORA-06512: at line 1
  
  Database has recently improved from 10g to 11g r2.
  
  You have an idea?
  Best regards.
  
  
  Oracle Database 11 g Enterprise Edition Release 11.2.0.1.0 - 64 bit Production
  PL/SQL Release 11.2.0.1.0 - Production
  CORE 11.2.0.1.0 Production
  AMT for IBM/AIX RISC System/6000: Version 11.2.0.1.0 - Production
  NLSRTL Version 11.2.0.1.0 - Production

  The message "Instance of database/976214629/1 was revived during the snapshot specified interval" is explicit.

  If you have restarted a database instance you CANNOT Get an AWR report where the start snapshot is before restarting and the snapshot from the end after a reboot.
  A restarting database instance resets performance and other statistics used by AWR to CWA Yes 0 cannot calculate values (what he does 'end-snapshot-value' LESS 'begin-snapshot-value') because they would most likely be negative and certainly be false and misleading.

  Hemant K Collette

• Number of processors and cores in AWR report

  Hello

  I have a report AWR to my system and a couple of entries confuse me.

  Q1. It's showing 3 carrots, 2 Sockets and 4 processors. The CPU and the Sockets, I understand that 2 chips with 2 processors per chip so 4 CPU.

  What confuses me, is the fact that it shows 3 carrots. Is that that by CPU cores? Othererwise 3-4 makes no sense?

  Q2. What is the difference between DB, time CPU and CPU DB?

  My understanding is that DB time is the time used by the process, including the time processor and wait time. Because a system can have more than one processor, it is quite natural that DB time may exceed to elapse time - since you have multiple processors that contribute to this time (I guess that DB time cannot be really more time elapse * our processors?)

  In fact, you could say if DB time does not exceed the time to elapse, then you have a Nock idle system?

  My understanding of time CPU, is that it's time where each process actually gets treatment CPU (so it does not time-out). I think that the AWR report confusingly used the term time CPU and CPU DB, to mean the same thing?

  clearly greatly appreciated

  Jim

  
  

  Hi Jimbo,

  Q1. "Nuclei" in the CWA report represents the quantity of physical processor cores and the "processors" takes into account the simultaneous multithreading so in your case, one option could be a CPU Socket has a dual core (not type hyperthreading) and the other CPU Socket has one heart (hyperthreaded). If this is the case, you will have 3 physical 4 CPU cores, (because it takes into account the hyper-threaded architecture) and 2 taken. It's just an option, you will need to check it out.

  Q2. No-Idle wait events are events that are not classified by Oracle as a "Idle" of events to wait wait:

  • Example of Idle wait-event: SQL * Net client message (server process is waiting for the client process to do something)
  • Idle wait-event example: db file scattered read (event waiting user IO representing a multilock read as full scan of the table or full scan small index.
  • You can get a complete list of active waiting events by running:

  Select name from v$ event_name where wait_class <> "inactive".

  • You can get a full list of the events of inactive waiting by running:

  Select name from v$ event_name where wait_class = 'Idle '.

  
  

  DB time is therefore the sum of all events of active waiting and also the CPU time that is a statistic:

  • You can see the value of the amount of time CPU in 10s of miiliseconds (centisecondes) for an exeuting session:

  SELECT THE VALUE

  FROM v$ sesstat JOIN v$ statname USING (statistics #)

  WHERE name = 'CPU used by this session' AND SID =

  • You can see the value of the time total CPU in 10s of milliseconds (centisecondes) for the instance of exeuting:

  SELECT the value from v$ sysstat

  WHERE name = 'CPU used by this session.

• awrrpti script - awr report fails

  Friends...

  OS: Linux

  DB: 11 GR 2

  I'm trying to solve this riddle, supposed to be a simple fix but not able to finish it...

  We run awrrpti script to generate AWR report for the whole day. What I do is ask DBA_HIST_SNAPSHOT and get the snapshot min (first) and max (last) of the day. Then I fed that range from snap_id to awrrpti script to generate AWR report all day to single instance.

  It works perfectly well, but if instance gets restarted during the day then my approach above does not work and AWR report generation fails.

  Current approach:

  1. the DBA_HIST_SNAPSHOT query

  2. download MIN (snap_id), MAX (snap_id) for the day

  3. power #2 to awrrpti via bind variable

  4 generate the unique HTML report for the instance

  Query used to collect the id of component software snap-in min/max:

  Select min (snap_id), max (snap_id)

  Of

  (select snap_id, begin_interval_time, end_interval_time

  of dba_hist_snapshot

  where begin_interval_time > = trunc(sysdate-1)

  and being_intreval_time < = trunc(sysdate-1+23/24)

  );

  Tips to avoid failures of AWR report generation if instance gets restarted?

  How to go to the entry below in simple sql? It is possible to start «WITH max_startup...» "in the sql script?

  Yes, there is no problem. Is it just another way to write the query

  But you can use this one instead:

  SELECT MIN(dhs.snap_id) min_snap_id, MAX(dhs.snap_id) max_snap_id
  FROM DBA_HIST_SNAPSHOT dhs,
  (SELECT MAX(startup_time) max_startup_time FROM DBA_HIST_SNAPSHOT) mst
  where dhs.startup_time = mst.max_startup_time
  and begin_interval_time >= trunc(SYSDATE-1)
  and begin_interval_time <= trunc(sysdate-1+23/24)
  ;
  

  again will try, test and update this blog

  Forum! Please, I beg you.

  Concerning

  Juan M

• begin and end in awr report

  Hi all

  Hope all are well. I need your help, I doubt reading the awr report.

  Summary of the report

  Cache sizes

  	Start	End
  Cache buffers:	572 M	572 M	Std block size:	8K
  Size of the shared pool:	408 M	408 M	Log buffer:	13 604 K

  My question is what is 'START' and 'END' in the figure above and why to cache buffer and shared pool sizes are the same for BEGIN and END.your help appreciated, thanks in advance.

  Best regards.

  size of the buffer at the start of the snapshot cache

  size of the buffer at the end of the snapshot cache

  Shared at the beginning of the snapshot pool

  Shared pool, at the end of the snapshot

  So that means: either you did not Oracle or Oracle to change these settings dynamically does not need to change.

  Always send four-digit version of your database and platform info. This forum is not keeping track of it.

  ---------------

  Sybrand Bakker

  Senior Oracle DBA