Waiting event when execute my jdbc queries

I write a simple multithread jdbc programme to connect to oracle, execute 10 time "select * from mytable" , when I start 2 threads, the time each thread use to complete queries is 9 second. when i start 3 threads, it become extremly slow.
I notice there are serveral waiting event: resmgr:waiting in end wait, resmgr:waiting in actses run, and single-task message , they are waiting for as long as 4 seconds. they after my programm finished,
could anyone tell me what are these event? do they affect the performance of my oracle? These wait events are associated with the Resource Manager which handles the Consumer Groups. Try changing your consumer group are shutting the Resource Manager off with
alter system set resource_manager_plan='';
then test your queries again.

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Start automatically CPS job waiting event when event not raised

Hi,
how to automatically start at a defined time a CPS job waiting an event, , if the event is not raised ?
Clement

Hi,
You can have another event associated with such job chains(say Event_Force_Start) and define an OR condition in the event expression of the job chain. You can trigger the Event_Force_Start by anothe dummy script that excutes based on scheduled time or a submit frame. Thus yu can start the job at required time irrespective of the event under consideration being raised or not
Regards
Raj

Event when execute CJ46

Hi all body ,
I create a program(ZPS_TRANSFERT) that transfers amounts to an external application. My problem is how to run this program(ZPS_TRANSFERT) through a job after the déclechement the event of execution of the transaction cj46.
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Hi,
Execute in Background enter all input values and goto program select background execution after taht you can go Tcode SM37 select your program spool it .
thanks
R

Performance Issue: Wait event "log file sync" and "Execute to Parse %"

In one of our test environments users are complaining about slow response.
In statspack report folowing are the top-5 wait events
Event Waits Time (cs) Wt Time
log file parallel write 1,046 988 37.71
log file sync 775 774 29.54
db file scattered read 4,946 248 9.47
db file parallel write 66 248 9.47
control file parallel write 188 152 5.80
And after runing the same application 4 times, we are geting Execute to Parse % = 0.10. Cursor sharing is forced and query rewrite is enabled
When I view v$sql, following command is parsed frequently
EXECUTIONS PARSE_CALLS
SQL_TEXT
93380 93380
select SEQ_ORDO_PRC.nextval from DUAL
Please suggest what should be the method to troubleshoot this and if I need to check some more information
Regards,
Sudhanshu Bhandari

Well, of course, you probably can't eliminate this sort of thing entirely: a setup such as yours is inevitably a compromise. What you can do is make sure your log buffer is a good size (say 10MB or so); that your redo logs are large (at least 100MB each, and preferably large enough to hold one hour or so of redo produced at the busiest time for your database without filling up); and finally set ARCHIVE_LAG_TARGET to something like 1800 seconds or more to ensure a regular, routine, predictable log switch.
It won't cure every ill, but that sort of setup often means the redo subsystem ceases to be a regular driver of foreground waits.

How to always display waiting picture on portal when executing a query ?

Hi,
We use netweaver portal to publish our queries to users
This queries use 0ANALYSIS_PATTERN template by default
Our issue is when a query is executed the waiting picture loading_ani.gif does not always appear and so the user don't know if his request is running
After several tests we saw that the waiting picture usually appears when user change values in variable screen
How can I customize to always have the waiting picture at any time a querie is in execution progress ?
Thanks for help
Sebastien

Hi Andre,
Maintain your factory calendar idents Valid To year field (BJAHR) in Table TFACD
You can do this via tcode SCAL, or navigate through SPRO.
Most likely you have your factory calendars set with Valid To dates as 2010. You may also be encountering some load issues depending on exit routines used in transformations in determining workdays/factory days etc.
Thanks,
Eric Filmer

ADF how to display a processing page when executing large queries

ADF how to display a processing page when executing large queries
The ADF application that I have written currently has the following structure:
DataPage (search.jsp) that contains a form that the user enters their search criteria --> forward action (doSearch) --> DataAction (validate) that validates the inputted values --> forward action (success) --> DataAction (performSearch) that has a refresh method dragged on it, and an action that manually sets the itterator for the collection to -1 --> forward action (success) --> DataPage (results.jsp) that displays the results of the then (hopefully) populated collection.
I am not using a database, I am using a java collection to hold the data and the refresh method executes a query against an Autonomy Server that retrieves results in XML format.
The problem that I am experiencing is that sometimes a user may submit a query that is very large and this creates problems because the browser times out whilst waiting for results to be displayed, and as a result a JBO-29000 null pointer error is displayed.
I have previously got round this using Java Servlets where by when a processing servlet is called, it automatically redirects the browser to a processing page with an animation on it so that the user knows something is being processed. The processing page then recalls the servlet every 3seconds to see if the processing has been completed and if it has the forward to the appropriate results page.
Unfortunately I can not stop users entering large queries as the system requires users to be able to search in excess of 5 million documents on a regular basis.
I'd appreciate any help/suggestions that you may have regarding this matter as soon as possible so I can make the necessary amendments to the application prior to its pilot in a few weeks time.

Hi Steve,
After a few attempts - yes I have a hit a few snags.
I'll send you a copy of the example application that I am working on but this is what I have done so far.
I've taken a standard application that populates a simple java collection (not database driven) with the following structure:
DataPage --> DataAction (refresh Collection) -->DataPage
I have then added this code to the (refreshCollectionAction) DataAction
protected void invokeCustomMethod(DataActionContext ctx)
super.invokeCustomMethod(ctx);
HttpSession session = ctx.getHttpServletRequest().getSession();
Thread nominalSearch = (Thread)session.getAttribute("nominalSearch") ;
if (nominalSearch == null)
synchronized(this)
//create new instance of the thread
nominalSearch = new ns(ctx);
} //end of sychronized wrapper
session.setAttribute("nominalSearch", nominalSearch);
session.setAttribute("action", "nominalSearch");
nominalSearch.start();
System.err.println("started thread calling loading page");
ctx.setActionForward("loading.jsp");
else
if (nominalSearch.isAlive())
System.err.println("trying to call loading page");
ctx.setActionForward("loading.jsp");
else
System.err.println("trying to call results page");
ctx.setActionForward("success");
Created another class called ns.java:
package view;
import oracle.adf.controller.struts.actions.DataActionContext;
import oracle.adf.model.binding.DCIteratorBinding;
import oracle.adf.model.generic.DCRowSetIteratorImpl;
public class ns extends Thread
private DataActionContext ctx;
public ns(DataActionContext ctx)
this.ctx = ctx;
public void run()
System.err.println("START");
DCIteratorBinding b = ctx.getBindingContainer().findIteratorBinding("currentNominalCollectionIterator");
((DCRowSetIteratorImpl)b.getRowSetIterator()).rebuildIteratorUpto(-1);
//b.executeQuery();
System.err.println("END");
and added a loading.jsp page that calls a new dataAction called processing every second. The processing dataAction has the following code within it:
package view;
import javax.servlet.http.HttpSession;
import oracle.adf.controller.struts.actions.DataForwardAction;
import oracle.adf.controller.struts.actions.DataActionContext;
public class ProcessingAction extends DataForwardAction
protected void invokeCustomMethod(DataActionContext actionContext)
// TODO: Override this oracle.adf.controller.struts.actions.DataAction method
super.invokeCustomMethod(actionContext);
HttpSession session = actionContext.getHttpServletRequest().getSession();
String action = (String)session.getAttribute("action");
if (action.equalsIgnoreCase("nominalSearch"))
actionContext.setActionForward("refreshCollection.do");
I'd appreciate any help or guidance that you may have on this as I really need to implement a generic loading page that can be called by a number of actions within my application as soon as possible.
Thanks in advance for your help
David.

Event flow in ABAP is different when executed via SE80 vs. via TCODE

Hi,
We have many existing custom ABAP report pgms that have a custom transaction code that executes them. Regardless of how the pgms are invoked, the event sequence in the pgm is INITIALIZATION, AT SELECTION-SCREEN, START-OF-SELECTION. etc.
Now, when I create a new pgm with a transaction code to invoke it, the event sequence when executing the pgm via SE38 is as before (All 3 events above are triggered). However when I invoke the pgm via the custom transaction code, only the event At SELECTION-SCREEN is executed. (Not the INITIALIZATION or the START-OF-SELECTION events).
We have upgraded our SAP GUI from 6.4 to 7.1.   We are upgrading our system from 46.C to ECC6. I get this error in ECC6 and also in the old system 46.C which is causing me to question whether the SAP Gui is involved. We are using SAP GUI 7.1 in both the 46.C and ECC6 systems.
Any help will be appreciated!
Thanks,
Deb

Hi All,
Here is my ABAP Code. I have put break points in the code so I can track the sequence.
REPORT ZDEBNEW .
data zdeb(2) type c.
tables kna1.
SELECTION-SCREEN BEGIN OF BLOCK A WITH FRAME TITLE TEXT-002.
SELECT-OPTIONS: I_KTOKD for KNA1-KTOKD.
SELECTION-SCREEN END OF BLOCK A.
INITIALIZATION.
zdeb = '1'.   "break
sy-subrc = sy-subrc.
PAI
AT SELECTION-SCREEN.
zdeb = '2'. "break
sy-subrc = sy-subrc.
START-OF-SELECTION.
zdeb = '3'. "break
sy-subrc = sy-subrc.
END-OF-SELECTION.
zdeb = '4'.   "break
sy-subrc = sy-subrc.
As for the type of transaction I am using...I created it via SE93 and specify SELECTION SCREEN 1000. I classify it as a Professional User transaction. One other thing I have noticed is that when I view the new pgm via SE80 I do not see Screen 1000 in the left navigation panel. If I try to create such a screen in SE80, it says it already exists. I can see Screen 1000 from tran SE51. In one of the existing old pgms, I do see screen 1000 when I view SE80.
Thanks for the help and interest!!!

File to JDBC :Error when executing statement for table/stored proc.

Hi,
I am getting following error when i am trying to insert data into z-table using JDBC recr adapter.
Error while parsing or executing XML-SQL document: Error processing request in sax parser: Error when executing statement for table/stored proc. 'ZTEST' (structure 'STATEMENT'): java.sql.SQLException: <u>[Microsoft][SQLServer 2000 Driver for JDBC][SQLServer]Invalid object name '<b>ZTEST</b>'.</u>
But the database table name 'ZTEST' exists in the system.
XML structure:
<?xml version="1.0" encoding="UTF-8"?>
<ns0:MT_RECR xmlns:ns0="http://urn:srini/FileToJDBC">
   <STATEMENT>
      <TEST action="INSERT">
         <table>ZTEST</table>
         <access>
            <ROLLNO>123</ROLLNO>
            <FIRSTNAME>ABC</FIRSTNAME>
            <LASTNAME>XYZ</LASTNAME>
         </access>
      </TEST>
   </STATEMENT>
</ns0:MT_RECR>
Regards,
Srinivas

Hi,
I have changed my MT str but still getting the same error.Is it possible to insert/ update a z-table using JDBC adapter.
XML str:
<?xml version="1.0" encoding="UTF-8"?>
<ns0:MT_RECR xmlns:ns0="http://urn:srini/FileToJDBC">
   <STATEMENT>
      <ZTEST action="INSERT">
         <access>
            <ROLLNO>123</ROLLNO>
            <FIRSTNAME>abc</FIRSTNAME>
            <LASTNAME>XYZ</LASTNAME>
         </access>
      </ZTEST>
   </STATEMENT>
</ns0:MT_RECR>
Regards,
Srinivas

Queries: duplicate info when executing a HR query

Hi.
Friends, i trying to do a query with info of two infotipes: 21 and 482 (aditional info of it21), when i execute the query the result it's a cartesian product (wrong result).
For example:
DATA
IT21
PERNR Subty Name
1 10 ssssss
2 11 dddddd
IT482
Pernr subty identity card
1 10 5
2 11 6
Result
Wrong Result with cartesian product of the query:
PERNR subty name it482-subty it482-identity card
1 10 ssssss 10 5
1 11 dddddd 10 5
1 10 ssssss 11 6
1 11 dddddd 11 6
The correct result must be:
PERNR subty name it482-subty it482-identity card
1 10 ssssss 10 5
1 11 dddddd 11 6
I think that the join of the PNPCE logical database it's performed using just personel number (pernr), how could i solve this issue?
Thanks in advance.
Albio.-
Solved in HCM Forum: Re: Queries: duplicate info when executing a HR query
Edited by: Albio Manuel Vivas on Aug 16, 2011 7:35 PM

I found where to put the switch, but it doesn't work.
I did this:
1) in the infogroup (tx sq02): goto/ code / data. Then i typed:
*$HR$ [P0482]
*$HR$ PRIMARY_INFTY = 'P0021'
2) save
3) verify
4) generate
Then i use the transaction S_PH0_48000513 - Ad-hoc-Query , and create a query, i save it, and execute, then the result it's wrong. I check the program generated by the query, and search for this text: 'hr-log' where are supposed that the code must appears, and the code that i added doesn't exits.
Any idea?
Thanks in advance.
Albio.-
Edited by: Albio Manuel Vivas on Aug 16, 2011 6:14 PM

PX Deq: Execute Reply - Wait event

I am seeing PX Deq: Execute Reply wait event for a query which returns no data. From metalink I see this can be ignored.
Any suggestion is appreciated.

I am attaching explain plan. Not sure if this helps. Another prod database which has similiar plan works fine.
Execution Plan
0 SELECT STATEMENT Optimizer=CHOOSE (Cost=205424 Card=1 Bytes=
142)
1 0 TABLE ACCESS* (BY INDEX ROWID) OF 'STG_TRD_SWAP_CF' (Cost= :Q804383
4 Card=1 Bytes=82) 001
2 1 NESTED LOOPS* (Cost=205424 Card=1 Bytes=142) :Q804383
001
3 2 HASH JOIN* (Cost=59005 Card=146419 Bytes=8785140) :Q804383
001
4 3 NESTED LOOPS* (Cost=3 Card=1 Bytes=25) :Q804383
000
5 4 VIEW (Cost=2 Card=1 Bytes=13)
6 5 SORT (AGGREGATE)
7 6 INDEX (FULL SCAN (MIN/MAX)) OF 'T_HUB_CONTROL_
TRADE_HDR_PK' (UNIQUE) (Cost=2 Card=579 Bytes=2316)
8 4 TABLE ACCESS (BY INDEX ROWID) OF 'T_HUB_CONTROL_TR
ADE_HDR' (Cost=1 Card=1 Bytes=12)
9 8 INDEX (UNIQUE SCAN) OF 'T_HUB_CONTROL_TRADE_HDR_
PK' (UNIQUE)
10 3 PARTITION RANGE* (ALL) :Q804383
001
11 10 PARTITION LIST* (ALL) :Q804383
001
12 11 TABLE ACCESS* (FULL) OF 'T_HUB_TRD_MAIN' (Cost=5 :Q804383
9002 Card=84630120 Bytes=2962054200) 001
13 2 INDEX* (RANGE SCAN) OF 'STG_TRD_SWAP_CF_PK' (UNIQUE) ( :Q804383
Cost=3 Card=1) 001
1 PARALLEL_COMBINED_WITH_CHILD
2 PARALLEL_TO_SERIAL SELECT /*+ ORDERED NO_EXPAND USE_NL(A2) INDE
X(A2 "STG_TRD_SWAP_CF_PK") */ A1.C0,
3 PARALLEL_COMBINED_WITH_PARENT
4 PARALLEL_FROM_SERIAL
10 PARALLEL_COMBINED_WITH_PARENT
11 PARALLEL_COMBINED_WITH_PARENT
12 PARALLEL_COMBINED_WITH_PARENT
13 PARALLEL_COMBINED_WITH_PARENT

High CPU load on Oracle when executing SELECT queries on TT

Hello. I have cache grid: 2 TT instances + Oracle with global dynamic async write cache group on single table with 1million entries. Each cache grid instance is located on its own host. I start performance test executing only SELECT queries on TT instances. At this time I see that Oracle process starts extensively consuming CPU time. According to documentation (if I get it right) all db reads are executed between TT instances. What is Oracle doing when I perform select from TT? In case we scale horizontally by adding TT instances won't Oracle become a bottleneck?

-bash-3.2$ ttVersion
TimesTen Release 11.2.1.8.0 (64 bit Linux/x86_64) (tt1121:53388) 2011-02-02T02:20:46Z
Instance admin: amironenko
Instance home directory: /opt/TimesTen/tt1121
World accessible
Daemon home directory: /opt/TimesTen/tt1121/info
PL/SQL enabled.
I create cache group as:
REATE DYNAMIC ASYNCHRONOUS WRITETHROUGH GLOBAL CACHE GROUP ttGroup
FROM tengri.sub (
id integer not null primary key,
msisdn varchar(32) not null,
name varchar (64),
balance integer,
short_num varchar (32),
address varchar (512),
type integer not null,
is_locked integer not null,
charging_profile_id integer,
cos_id integer,
currency_id integer,
language_id integer
create unique index idx_sub_msisdn on sub ( msisdn );
I perform SELECT query as the following:
if (readPs == null) {
String sqlQuery = "SELECT id, msisdn, name, balance, short_num, address, type, is_locked, " +
"charging_profile_id, cos_id, currency_id, language_id FROM sub WHERE msisdn = ?";
readPs = con.prepareStatement(sqlQuery, ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
readPs.setString(1, key);
ResultSet rs = readPs.executeQuery();
1million entries were provisioned via TT so I assume it's already there. I have 2 clients. Each one is connected to local TT instance. They read data from the same range so I assume there is a lot of data movement between TT instances. No specific value was set for PassThrough.
I'll provide "ttIsql 'monitor'" information as soon as possible, can't perform it right now, sorry.
Thanks!

Workflow error in fork step, process control, wait event

I am using fork step in workflow which has 2 parallel branches. In 1st branch i have a user decision step followed by a task for posting PO document in case of approval. In the 2nd branch of fork step I have a wait step to wait for an event followed by the same task for posting document with a process control step after that in the end to cancel the workitem(workitem generated by user decision step in the 1st branch of fork). I created the event by using a custom BOR object.
After the fork step is triggered, i have both a wait event running and workitem generated. When i raise the wait event from SWUE by entering the event, object key etc it works fine i.e., the workitem in the other branch is set of logically deleted and workflow ends.
But if the wait event is triggered from the program i.e., using FM SWW_WI_CREATE_VIA_EVENT, both get an error message in workflow log(SWIA). The message is: Error when executing the binding between work item 000000XXXXXX and flow item 000000XXXXXX where workitem number is the workitem id of the posting document task and flow item id is the workflow parent id

hi,
message is self explanatory.
Activate the event trace SWELS, then do the event with SWUE and within your program (als please use SAP_WAPI function modules).
Now compare the 2 events in SWEL to see what the differences are .
Kind regards, Rob Dielemans

Wait Events "log file parallel write" / "log file sync" during CREATE INDEX

Hello guys,
at my current project i am performing some performance tests for oracle data guard. The question is "How does a LGWR SYNC transfer influences the system performance?"
To get some performance values, that i can compare i just built up a normal oracle database in the first step.
Now i am performing different tests like creating "large" indexes, massive parallel inserts/commits, etc. to get the bench mark.
My database is an oracle 10.2.0.4 with multiplexed redo log files on AIX.
I am creating an index on a "normal" table .. i execute "dbms_workload_repository.create_snapshot()" before and after the CREATE INDEX to get an equivalent timeframe for the AWR report.
After the index is built up (round about 9 GB) i perform an awrrpt.sql to get the AWR report.
And now take a look at these values from the AWR
                                                                   Avg
                                             %Time Total Wait    wait     Waits
Event                                 Waits -outs    Time (s)    (ms)      /txn
log file parallel write              10,019     .0         132      13      33.5
log file sync                           293     .7           4      15       1.0
......How can this be possible?
Regarding to the documentation
-> log file sync: http://download.oracle.com/docs/cd/B19306_01/server.102/b14237/waitevents003.htm#sthref3120
Wait Time: The wait time includes the writing of the log buffer and the post.-> log file parallel write: http://download.oracle.com/docs/cd/B19306_01/server.102/b14237/waitevents003.htm#sthref3104
Wait Time: Time it takes for the I/Os to complete. Even though redo records are written in parallel, the parallel write is not complete until the last I/O is on disk.This was also my understanding .. the "log file sync" wait time should be higher than the "log file parallel write" wait time, because of it includes the I/O and the response time to the user session.
I could accept it, if the values are close to each other (maybe round about 1 second in total) .. but the different between 132 seconds and 4 seconds is too noticeable.
Is the behavior of the log file sync/write different when performing a DDL like CREATE INDEX (maybe async .. like you can influence it with the initialization parameter COMMIT_WRITE??)?
Do you have any idea how these values come about?
Any thoughts/ideas are welcome.
Thanks and Regards

Surachart Opun (HunterX) wrote:
Thank you for Nice Idea.
In this case, How can we reduce "log file parallel write" and "log file sync" waited time?
CREATE INDEX with NOLOGGINGA NOLOGGING can help, can't it?Yes - if you create index nologging then you wouldn't be generating that 10GB of redo log, so the waits would disappear.
Two points on nologging, though:
<ul>
it's "only" an index, so you could always rebuild it in the event of media corruption, but if you had lots of indexes created nologging this might cause an unreasonable delay before the system was usable again - so you should decide on a fallback option, such as taking a new backup of the tablespace as soon as all the nologging operatons had completed.
If the database, or that tablespace, is in +"force logging"+ mode, the nologging will not work.
</ul>
Don't get too alarmed by the waits, though. My guess is that the +"log file sync"+ waits are mostly from other sessions, and since there aren't many of them the other sessions are probably not seeing a performance issue. The +"log file parallel write"+ waits are caused by your create index, but they are happeninng to lgwr in the background which is running concurrently with your session - so your session is not (directly) affected by them, so may not be seeing a performance issue.
The other sessions are seeing relatively high sync times because their log file syncs have to wait for one of the large writes that you have triggered to complete, and then the logwriter includes their (little) writes with your next (large) write.
There may be a performance impact, though, from the pure volume of I/O. Apart from the I/O to write the index you have LGWR writting (N copies) of the redo for the index and ARCH is reading and writing the completed log files caused by the index build. So the 9GB of index could easily be responsible for vastly more I/O than the initial 9GB.
Regards
Jonathan Lewis
http://jonathanlewis.wordpress.com
http://www.jlcomp.demon.co.uk
To post code, statspack/AWR report, execution plans or trace files, start and end the section with the tag {noformat}{noformat} (lowercase, curly brackets, no spaces) so that the text appears in fixed format.
"Science is more than a body of knowledge; it is a way of thinking"
Carl Sagan

Wait event "virtual circuit wait" in wait class "Network" was consuming sig

Hello,
We are facing this problem when there are 2 queries try to run at the same time.
The first query takes longer to finish so 2nd has to wait for 1st to be finished and then only 2nd starts. It seems the jam is at netowork instead of server.
I want to make sure before I start testing on network.
I get following :
Wait event "virtual circuit wait" in wait class "Network" was consuming significant database time. 98.4
Wait class "Network" was consuming significant database time.
and recommendations is stated as :
Investigate the cause for high "virtual circuit wait" waits with P1 ("circuit#") value "21" and P2 ("type") value "2".
I am checking OEM.
Thanks,
Shashi.

Hello Sybrand,
Can you suggest some changes to be done to test ?
Here is my shared server config :
SQL> show parameter SHARED
NAME TYPE VALUE
hi_shared_memory_address integer 0
max_shared_servers integer
shared_memory_address integer 0
shared_pool_reserved_size big integer 135895449
shared_pool_size big integer 0
shared_server_sessions integer
shared_servers integer 1
Thanks,
Shashi.

Wait events

Hi ! I have the following wait events in my top timed and I don't know who originated them:
Wait Event Wait Time Summary Avg Wait Time (ms)
I# Class Event Waits %Timeouts Total(s) Avg(ms) %DB time Avg Min Max Std Dev Cnt
* DB CPU N/A N/A 59,651.48 N/A 45.87 2
User I/O db file sequential read 4,369,213 0.0 20,831.46 4.8 16.02 4.72 4.29 5.14 0.60 2
Other enq: CF - contention 155,822 3.9 10,390.74 66.7 7.99 68.62 60.31 76.94 11.76 2
System I/O RMAN backup & recovery I/O 87,205 0.0 5,477.09 62.8 9.15 62.81 62.81 62.81 1
Cluster gc current block 2-way 2,914,457 0.0 4,811.61 1.7 3.70 1.67 1.60 1.74 0.10 2
System I/O control file sequential read 3,038,672 0.0 3,762.66 1.2 2.89 1.24 1.22 1.27 0.04 2
Concurrenc os thread startup 2,842 0.0 3,695.14 1300.2 2.84 1311.83 1143.07 1480.59 238.66 2
System I/O log file parallel write 1,341,907 0.0 2,530.17 1.9 1.95 1.88 1.88 1.89 0.01 2
Other reliable message 471,495 0.1 2,388.01 5.1 1.84 5.08 4.12 6.03 1.35 2
Concurrenc row cache lock 3,135,774 0.0 2,224.53 0.7 1.71 0.72 0.68 0.75 0.05 2
1 DB CPU N/A N/A 22,584.30 N/A 37.75
User I/O db file sequential read 2,451,215 0.0
System I/O RMAN backup & recovery I/O 87,205 0.0
Other enq: CF - contention 59,735 5.3
Cluster gc current block 2-way 1,803,542 0.0
System I/O control file sequential read 1,831,180 0.0
Concurrenc os thread startup 1,323 0.0
System I/O log file parallel write 727,883 0.0
Cluster gc cr multi block request 523,744 0.0
Concurrenc row cache lock 1,830,913 0.0
2 DB CPU N/A N/A
User I/O db file sequential read 1,917,998 0.0
Other enq: CF - contention 96,087 3.0
Cluster gc current block 2-way 1,110,915 0.0
Concurrenc os thread startup 1,519 0.0
System I/O control file sequential read 1,207,492 0.0
User I/O direct path read 404,587 0.0
Other reliable message 233,033 0.1
System I/O log file parallel write 614,024 0.0
System I/O control file parallel write 128,905 0.0
Those are the most worrying events:
enq: CF - contention
I/O control file sequential read
Concurrenc os thread startup
I have been investigating and I wonder what is wrong to get Concurrenc os thread startup. According to one blog, os thread should be always related with network issues...
The awr snapshot is from my production window day.
Rac 11.2.0.3 two nodes on Solaris Sparc 10.

I have studied the ASH in the problematic period and I have found that there are some full scans:
Summary of All User Input
Format         : TEXT
DB Id          : 2752323407
Inst num       : 1
Begin time     : 08-Feb-13 09:30:00
End time       : 08-Feb-13 10:20:00
Slot width     : Default
Report targets : 0
Report name    : ashrpt_1_0208_1020.txt
ASH Report For dbp/dbp1
DB Name         DB Id    Instance     Inst Num Release     RAC Host
dbp           2752323407 dbp1                1 11.2.0.3.0 YES host-dbp-1
CPUs           SGA Size       Buffer Cache        Shared Pool    ASH Buffer Size
16     12,651M (100%)    10,048M (79.4%)     1,921M (15.2%)       32.0M (0.3%)
          Analysis Begin Time:   08-Feb-13 09:30:00
            Analysis End Time:   08-Feb-13 10:20:00
                 Elapsed Time:        50.0 (mins)
            Begin Data Source:   DBA_HIST_ACTIVE_SESS_HISTORY
                                 in AWR snapshot 5100
              End Data Source:   DBA_HIST_ACTIVE_SESS_HISTORY
                                 in AWR snapshot 5101
                                  + V$ACTIVE_SESSION_HISTORY
                 Sample Count:      10,069
      Average Active Sessions:       33.56
Avg. Active Session per CPU:        2.10
                Report Target:   None specified
Top User Events                     DB/Inst: dbp/dbp1 (Feb 08 09:30 to 10:20)
                                                               Avg Active
Event                               Event Class        % Event   Sessions
library cache lock                  Concurrency          43.73      14.68
cursor: pin S wait on X             Concurrency          18.61       6.25
CPU + Wait for CPU                  CPU                  15.77       5.29
reliable message                    Other                 5.88       1.97
enq: KO - fast object checkpoint    Application           3.48       1.17
Top Background Events               DB/Inst: dbp/dbp1 (Feb 08 09:30 to 10:20)
                                                               Avg Active
Event                               Event Class     % Activity   Sessions
CPU + Wait for CPU                  CPU                   1.25       0.42
Top Cluster Events                  DB/Inst: dbp/dbp1 (Feb 08 09:30 to 10:20)
Event                          % Event Remote I % Activity
gc current block 2-way            1.72        2       1.72
gc cr grant 2-way                 1.58      N/A       1.07
Top Event P1/P2/P3 Values           DB/Inst: dbp/dbp1 (Feb 08 09:30 to 10:20)
Event                          % Event P1 Value, P2 Value, P3 Value % Activity
Parameter 1                Parameter 2                Parameter 3
library cache lock               43.75 "29115227816","29218763456","       1.22
handle address             lock address               100*mode+namespace
                                       "29115227816","28694732944","       1.20
                                       "29115227816","28812373936","       1.17
cursor: pin S wait on X          18.61 "1497800770","3934190043136",       1.54
idn                        value                      where
                                       "1497800770","7773890805760",       1.15
reliable message                  6.07 "30432532808","30354909248","       0.13
channel context            channel handle             broadcast message
enq: KO - fast object checkpoi    3.49      "1263468550","65640","1"       0.52
name|mode                  2                          0
db file sequential read           1.81               "1","25220","1"       0.01
file#                      block#                     blocks
Top Service/Module                  DB/Inst: dbp/dbp1 (Feb 08 09:30 to 10:20)
Service        Module                   % Activity Action               % Action
dbp_DVEBMGS11 CL_SQL_STATEMENT========      86.80 383                     86.80
dbp_D10_0066   CL_SQL_STATEMENT========       6.28 383                      3.34
                                                   104                      2.94
dbp_D10_0064   CL_SQL_STATEMENT========       2.40 383                      2.39
SYS$BACKGROUND UNNAMED                        1.51 UNNAMED                  1.51
Top Client IDs                      DB/Inst: dbp/dbp1 (Feb 08 09:30 to 10:20)
                  No data exists for this section of the report.
Top SQL Command Types               DB/Inst: dbp/dbp1 (Feb 08 09:30 to 10:20)
-> 'Distinct SQLIDs' is the count of the distinct number of SQLIDs
      with the given SQL Command Type found over all the ASH samples
      in the analysis period
                                           Distinct            Avg Active
SQL Command Type                             SQLIDs % Activity   Sessions
SELECT                                          485      94.56      31.74
ALTER TABLE                                     220       2.89       0.97
Top Phases of Execution             DB/Inst: dbp/dbp1 (Feb 08 09:30 to 10:20)
                                          Avg Active
Phase of Execution             % Activity   Sessions
Parse                               67.50      22.66
SQL Execution                       30.46      10.22
Hard Parse                           5.37       1.80
Top Remote Instances                DB/Inst: dbp/dbp1 (Feb 08 09:30 to 10:20)
Wait Class           % Wait Remote I % Activity
Cluster                 5.22        2       3.90
                                  N/A       1.27
Top SQL with Top Events     DB/Inst: dbp/dbp1 (Feb 08 09:30 to 10:20)
                                                        Sampled #
                 SQL ID             Planhash        of Executions     % Activity
Event                          % Event Top Row Source                    % RwSrc
          350v06jcnd822                  N/A                    0          18.03
library cache lock                9.41 ** Row Source Not Available **       9.41
SELECT "DT"."SID_0CALMONTH" AS "S____048" ,"D3"."SID_0MATERIAL" AS "S____006" ,
"DU"."SID_0UNIT" AS "S____023" ,"DT"."SID_0CALDAY" AS "S____021" ,"D2"."SID_0MET
YPE" AS "S____1342" ,"D2"."SID_0VTYPE" AS "S____504" ,"X33"."S__Z99GRMAT" AS "S_
___4443" , SUM ( "F"."QUANTITY" ) AS "Z____1299" , COUNT( * ) AS "Z____016"
                                         N/A                    0          18.03
cursor: pin S wait on X           8.62 ** Row Source Not Available **       8.62
SELECT "DT"."SID_0CALMONTH" AS "S____048" ,"D3"."SID_0MATERIAL" AS "S____006" ,
"DU"."SID_0UNIT" AS "S____023" ,"DT"."SID_0CALDAY" AS "S____021" ,"D2"."SID_0MET
YPE" AS "S____1342" ,"D2"."SID_0VTYPE" AS "S____504" ,"X33"."S__Z99GRMAT" AS "S_
___4443" , SUM ( "F"."QUANTITY" ) AS "Z____1299" , COUNT( * ) AS "Z____016"
          48unmtd983uz6                  N/A                    0          16.75
library cache lock               12.87 ** Row Source Not Available **      12.87
SELECT "DT"."SID_0CALDAY" AS "S____021" ,"DT"."SID_0CALMONTH" AS "S____048" ,"D
3"."SID_0MATERIAL" AS "S____006" ,"DU"."SID_0UNIT" AS "S____023" ,"D2"."SID_0MET
YPE" AS "S____1342" ,"D2"."SID_0VTYPE" AS "S____504" , SUM ( "F"."QUANTITY" )
AS "Z____1299" , COUNT( * ) AS "Z____016" FROM "/BIC/FZ99IC114" "F" JOIN "/BIC
                                         N/A                    0          16.75
cursor: pin S wait on X           3.88 ** Row Source Not Available **       3.88
SELECT "DT"."SID_0CALDAY" AS "S____021" ,"DT"."SID_0CALMONTH" AS "S____048" ,"D
3"."SID_0MATERIAL" AS "S____006" ,"DU"."SID_0UNIT" AS "S____023" ,"D2"."SID_0MET
YPE" AS "S____1342" ,"D2"."SID_0VTYPE" AS "S____504" , SUM ( "F"."QUANTITY" )
AS "Z____1299" , COUNT( * ) AS "Z____016" FROM "/BIC/FZ99IC114" "F" JOIN "/BIC
          350v06jcnd822           2426825131                    0          15.49
library cache lock                9.74 ** Row Source Not Available **       9.74
SELECT "DT"."SID_0CALMONTH" AS "S____048" ,"D3"."SID_0MATERIAL" AS "S____006" ,
"DU"."SID_0UNIT" AS "S____023" ,"DT"."SID_0CALDAY" AS "S____021" ,"D2"."SID_0MET
YPE" AS "S____1342" ,"D2"."SID_0VTYPE" AS "S____504" ,"X33"."S__Z99GRMAT" AS "S_
___4443" , SUM ( "F"."QUANTITY" ) AS "Z____1299" , COUNT( * ) AS "Z____016"
cursor: pin S wait on X           4.14 ** Row Source Not Available **       4.14
CPU + Wait for CPU                1.61 SELECT STATEMENT                     1.58
          48unmtd983uz6           3511339786                    0          14.98
library cache lock               11.50 ** Row Source Not Available **      11.50
SELECT "DT"."SID_0CALDAY" AS "S____021" ,"DT"."SID_0CALMONTH" AS "S____048" ,"D
3"."SID_0MATERIAL" AS "S____006" ,"DU"."SID_0UNIT" AS "S____023" ,"D2"."SID_0MET
YPE" AS "S____1342" ,"D2"."SID_0VTYPE" AS "S____504" , SUM ( "F"."QUANTITY" )
AS "Z____1299" , COUNT( * ) AS "Z____016" FROM "/BIC/FZ99IC114" "F" JOIN "/BIC
cursor: pin S wait on X           1.97 ** Row Source Not Available **       1.97
CPU + Wait for CPU                1.51 SELECT STATEMENT                     1.42
          07tcvyb6frtkx           2929764020                    1           1.87
gc cr grant 2-way                 0.80 TABLE ACCESS - BY USER ROWID         0.75
SELECT "D3"."SID_0SHIP_TO" AS "SID" FROM "/BIC/FZ99IC035" "F" JOIN "/BIC/DZ99IC
0352" "D2" ON "F" . "KEY_Z99IC0352" = "D2" . "DIMID" JOIN "/BI0/XMATERIAL" "X9"
ON "D2" . "SID_0MATERIAL" = "X9" . "SID" JOIN "/BIC/DZ99IC0355" "D5" ON "F" .
"KEY_Z99IC0355" = "D5" . "DIMID" JOIN "/BIC/DZ99IC0353" "D3" ON "F" . "KEY_Z99
Top SQL with Top Events     DB/Inst: dbp/dbp1 (Feb 08 09:30 to 10:20)
                                                        Sampled #
                 SQL ID             Planhash        of Executions     % Activity
Event                          % Event Top Row Source                    % RwSrc
Top SQL with Top Row Sources        DB/Inst: dbp/dbp1 (Feb 08 09:30 to 10:20)
                                                        Sampled #
                 SQL ID             PlanHash        of Executions     % Activity
Row Source                               % RwSrc Top Event               % Event
          350v06jcnd822                  N/A                    0          18.03
** Row Source Not Available **             18.03 library cache lock         9.41
SELECT "DT"."SID_0CALMONTH" AS "S____048" ,"D3"."SID_0MATERIAL" AS "S____006" ,
"DU"."SID_0UNIT" AS "S____023" ,"DT"."SID_0CALDAY" AS "S____021" ,"D2"."SID_0MET
YPE" AS "S____1342" ,"D2"."SID_0VTYPE" AS "S____504" ,"X33"."S__Z99GRMAT" AS "S_
___4443" , SUM ( "F"."QUANTITY" ) AS "Z____1299" , COUNT( * ) AS "Z____016"
          48unmtd983uz6                  N/A                    0          16.75
** Row Source Not Available **             16.75 library cache lock        12.87
SELECT "DT"."SID_0CALDAY" AS "S____021" ,"DT"."SID_0CALMONTH" AS "S____048" ,"D
3"."SID_0MATERIAL" AS "S____006" ,"DU"."SID_0UNIT" AS "S____023" ,"D2"."SID_0MET
YPE" AS "S____1342" ,"D2"."SID_0VTYPE" AS "S____504" , SUM ( "F"."QUANTITY" )
AS "Z____1299" , COUNT( * ) AS "Z____016" FROM "/BIC/FZ99IC114" "F" JOIN "/BIC
          350v06jcnd822           2426825131                    0          15.49
** Row Source Not Available **             13.91 library cache lock         9.74
SELECT "DT"."SID_0CALMONTH" AS "S____048" ,"D3"."SID_0MATERIAL" AS "S____006" ,
"DU"."SID_0UNIT" AS "S____023" ,"DT"."SID_0CALDAY" AS "S____021" ,"D2"."SID_0MET
YPE" AS "S____1342" ,"D2"."SID_0VTYPE" AS "S____504" ,"X33"."S__Z99GRMAT" AS "S_
___4443" , SUM ( "F"."QUANTITY" ) AS "Z____1299" , COUNT( * ) AS "Z____016"
SELECT STATEMENT                            1.58 CPU + Wait for CPU         1.58
          48unmtd983uz6           3511339786                    0          14.98
** Row Source Not Available **             13.56 library cache lock        11.50
SELECT "DT"."SID_0CALDAY" AS "S____021" ,"DT"."SID_0CALMONTH" AS "S____048" ,"D
3"."SID_0MATERIAL" AS "S____006" ,"DU"."SID_0UNIT" AS "S____023" ,"D2"."SID_0MET
YPE" AS "S____1342" ,"D2"."SID_0VTYPE" AS "S____504" , SUM ( "F"."QUANTITY" )
AS "Z____1299" , COUNT( * ) AS "Z____016" FROM "/BIC/FZ99IC114" "F" JOIN "/BIC
SELECT STATEMENT                            1.42 CPU + Wait for CPU         1.42
          07tcvyb6frtkx           2929764020                    1           1.87
TABLE ACCESS - BY USER ROWID                1.59 gc cr grant 2-way          0.75
SELECT "D3"."SID_0SHIP_TO" AS "SID" FROM "/BIC/FZ99IC035" "F" JOIN "/BIC/DZ99IC
0352" "D2" ON "F" . "KEY_Z99IC0352" = "D2" . "DIMID" JOIN "/BI0/XMATERIAL" "X9"
ON "D2" . "SID_0MATERIAL" = "X9" . "SID" JOIN "/BIC/DZ99IC0355" "D5" ON "F" .
"KEY_Z99IC0355" = "D5" . "DIMID" JOIN "/BIC/DZ99IC0353" "D3" ON "F" . "KEY_Z99
Top SQL using literals              DB/Inst: dbp/dbp1 (Feb 08 09:30 to 10:20)
-> FORCE_MATCHING_SIGNATURE is used to identify SQL statements that are
      identical except for their use of literals.
-> Please refer to the Oracle Database Reference to understand how
      the FORCE_MATCHING_SIGNATURE is derived.
                                     # of Sampled
FORCE_MATCHING_SIGNATURE % Activity SQL Versions
Example SQL 1
Example SQL 2
      1021017294885722791       2.89          218
0htvt0stu1vtq
SELECT COUNT(*) FROM "/BIC/FZ99IC003" WHERE "KEY_Z99IC003P" = :A0
0htvt0stu1vtq
Top Parsing Module/Action           DB/Inst: dbp/dbp1 (Feb 08 09:30 to 10:20)
Module                         Action                           % Activ Event
CL_SQL_STATEMENT============== 383                                67.25 library
                               383                                      cursor:
                               383                                      CPU + Wa
Top Sessions running PQs            DB/Inst: dbp/dbp1 (Feb 08 09:30 to 10:20)
-> This section aggregates all the work done by the PQ slaves into
      the session issuing the parallel query.
Sid,Srl# (Inst) % Activity SQL ID        Event                          % Event
User                 Program
1506,   19(1)      33.57 350v06jcnd822 library cache lock               19.15
UserID:
SELECT "DT"."SID_0CALMONTH" AS "S____048" ,"D3"."SID_0MATERIAL" AS "S____006" ,
"DU"."SID_0UNIT" AS "S____023" ,"DT"."SID_0CALDAY" AS "S____021" ,"D2"."SID_0MET
YPE" AS "S____1342" ,"D2"."SID_0VTYPE" AS "S____504" ,"X33"."S__Z99GRMAT" AS "S_
___4443" , SUM ( "F"."QUANTITY" ) AS "Z____1299" , COUNT( * ) AS "Z____016"
                                         cursor: pin S wait on X          12.76
SELECT "DT"."SID_0CALMONTH" AS "S____048" ,"D3"."SID_0MATERIAL" AS "S____006" ,
"DU"."SID_0UNIT" AS "S____023" ,"DT"."SID_0CALDAY" AS "S____021" ,"D2"."SID_0MET
YPE" AS "S____1342" ,"D2"."SID_0VTYPE" AS "S____504" ,"X33"."S__Z99GRMAT" AS "S_
___4443" , SUM ( "F"."QUANTITY" ) AS "Z____1299" , COUNT( * ) AS "Z____016"
                                         CPU + Wait for CPU                1.61
SELECT "DT"."SID_0CALMONTH" AS "S____048" ,"D3"."SID_0MATERIAL" AS "S____006" ,
"DU"."SID_0UNIT" AS "S____023" ,"DT"."SID_0CALDAY" AS "S____021" ,"D2"."SID_0MET
YPE" AS "S____1342" ,"D2"."SID_0VTYPE" AS "S____504" ,"X33"."S__Z99GRMAT" AS "S_
___4443" , SUM ( "F"."QUANTITY" ) AS "Z____1299" , COUNT( * ) AS "Z____016"
2255, 1067(1)      31.78 48unmtd983uz6 library cache lock               24.37
UserID:
SELECT "DT"."SID_0CALDAY" AS "S____021" ,"DT"."SID_0CALMONTH" AS "S____048" ,"D
3"."SID_0MATERIAL" AS "S____006" ,"DU"."SID_0UNIT" AS "S____023" ,"D2"."SID_0MET
YPE" AS "S____1342" ,"D2"."SID_0VTYPE" AS "S____504" , SUM ( "F"."QUANTITY" )
AS "Z____1299" , COUNT( * ) AS "Z____016" FROM "/BIC/FZ99IC114" "F" JOIN "/BIC
                                         cursor: pin S wait on X           5.85
SELECT "DT"."SID_0CALDAY" AS "S____021" ,"DT"."SID_0CALMONTH" AS "S____048" ,"D
3"."SID_0MATERIAL" AS "S____006" ,"DU"."SID_0UNIT" AS "S____023" ,"D2"."SID_0MET
YPE" AS "S____1342" ,"D2"."SID_0VTYPE" AS "S____504" , SUM ( "F"."QUANTITY" )
AS "Z____1299" , COUNT( * ) AS "Z____016" FROM "/BIC/FZ99IC114" "F" JOIN "/BIC
                                         CPU + Wait for CPU                1.51
SELECT "DT"."SID_0CALDAY" AS "S____021" ,"DT"."SID_0CALMONTH" AS "S____048" ,"D
3"."SID_0MATERIAL" AS "S____006" ,"DU"."SID_0UNIT" AS "S____023" ,"D2"."SID_0MET
YPE" AS "S____1342" ,"D2"."SID_0VTYPE" AS "S____504" , SUM ( "F"."QUANTITY" )
AS "Z____1299" , COUNT( * ) AS "Z____016" FROM "/BIC/FZ99IC114" "F" JOIN "/BIC
Top DB Objects                      DB/Inst: dbp/dbp1 (Feb 08 09:30 to 10:20)
-> With respect to Application, Cluster, User I/O and buffer busy waits only.
      Object ID % Activity Event                             % Event
Object Name (Type)                                    Tablespace
       13661539       2.45 gc buffer busy acquire               0.87
SAPSR3./BIC/EZ99IC013 (TABLE)                         PSAPSR3SSD
Top DB Files                        DB/Inst: dbp/dbp1 (Feb 08 09:30 to 10:20)
-> With respect to Cluster and User I/O events only.
        File ID % Activity Event                             % Event
File Name                                             Tablespace
             53       3.60 gc current block 2-way               0.98
+dbp_DATA/dbp_2/datafile/psapsr3ssd.315.805562113     PSAPSR3SSD
Top Latches                         DB/Inst: dbp/dbp1 (Feb 08 09:30 to 10:20)
                  No data exists for this section of the report.
Activity Over Time                  DB/Inst: dbp/dbp1 (Feb 08 09:30 to 10:20)
-> Analysis period is divided into smaller time slots
-> Top 3 events are reported in each of those slots
-> 'Slot Count' shows the number of ASH samples in that slot
-> 'Event Count' shows the number of ASH samples waiting for
   that event in that slot
-> '% Event' is 'Event Count' over all ASH samples in the analysis period
                         Slot                                   Event
Slot Time (Duration)    Count Event                             Count % Event
09:30:00   (5.0 min)      260 gc buffer busy acquire               43    0.43
                              reliable message                     34    0.34
                              CPU + Wait for CPU                   29    0.29
09:35:00   (5.0 min)      303 CPU + Wait for CPU                   76    0.75
                              db file sequential read              40    0.40
                              gc buffer busy acquire               39    0.39
09:40:00   (5.0 min)      366 CPU + Wait for CPU                  209    2.08
                              db file sequential read              26    0.26
                              gc current block 2-way               22    0.22
09:45:00   (5.0 min)      511 CPU + Wait for CPU                  249    2.47
                              cursor: pin S wait on X              93    0.92
                              reliable message                     45    0.45
09:50:00   (5.0 min)    2,245 cursor: pin S wait on X           1,442   14.32
                              library cache lock                  407    4.04
                              reliable message                    112    1.11
09:55:00   (5.0 min)    2,037 library cache lock                1,378   13.69
                              cursor: pin S wait on X             297    2.95
                              CPU + Wait for CPU                  125    1.24
10:00:00   (5.0 min)    1,823 library cache lock                1,371   13.62
                              CPU + Wait for CPU                  263    2.61
                              reliable message                     72    0.72
10:05:00   (5.0 min)    1,273 library cache lock                  866    8.60
                              CPU + Wait for CPU                  155    1.54
                              reliable message                     96    0.95
10:10:00   (5.0 min)      798 library cache lock                  350    3.48
                              CPU + Wait for CPU                  287    2.85
                              reliable message                     54    0.54
10:15:00   (5.0 min)      436 CPU + Wait for CPU                  200    1.99
                              reliable message                     61    0.61
                              enq: KO - fast object checkpoi       42    0.42
          -------------------------------------------------------------Problems are always on instance 1.
The queries are different each day, the top sql with performance problem changes the sql_id and I cant attack them or apply a sql profile or tune them because they only execute during a period.
Any idea?
:(

Waiting event when execute my jdbc queries

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