What are dead locks in BW

hI,
What are dead locks in BW

Hi ,
The concept of dead lock is as similar as in Oracle. If Process P1 is using resource A (locked by P1)) and waiting for B and Process P2is using resouce B(locked by P2) and waiting for resouceA. This creates dead lock as both can not proceed further.
In BW deadlock usually occur in delta load. As, far as my observance deadlock usually occurs during processing of update rules. This may be because more than one package will be processing same record as in delta load, data moves from changelog of below level to next level.
Regards
Sushma

Similar Messages

What are the lock modes in Lock object

What are the lock modes in Lock object ?
what are the divfferences between
Exclusive , cumulative
Shared
Exclusive , not cumulative
Could any body explain what happens in each table lock ?
How the lock consists ?

HI
Lock objects are used to synchronize access to the same data by more than one program.
The lock mode controls whether several users can access data records at the same time. The lock mode can be assigned separately for each table in the lock object. When the lock is set, the corresponding lock entry is stored in the lock table of the system for each table.
There are three types of lock modes
1.Exclusive
2.Shared
3.Exclusive not cummulative
Exclusive lock: The locked data can only be displayed or edited by a single user. A request for another exclusive lock or for a shared lock is rejected.
Shared lock: More than one user can access the locked data at the same time in display mode. A request for another shared lock is accepted, even if it comes from another user. An exclusive lock is rejected.
Exclusive but not cumulative: Exclusive locks can be requested several times from the same transaction and are processed successively. In contrast, exclusive but not cumulative locks can be called only once from the same transaction. All other lock requests are rejected.
please go through these links:
<a href="http://help.sap.com/saphelp_nw04/helpdata/en/a2/3547360f2ea61fe10000009b38f839/frameset.htm">http://help.sap.com/saphelp_nw04/helpdata/en/a2/3547360f2ea61fe10000009b38f839/frameset.htm</a>
<a href="http://help.sap.com/saphelp_nw04/helpdata/en/af/22ab01dd0b11d1952000a0c929b3c3/frameset.htm">http://help.sap.com/saphelp_nw04/helpdata/en/af/22ab01dd0b11d1952000a0c929b3c3/frameset.htm</a>
<a href="http://help.sap.com/saphelp_nw04/helpdata/en/cf/21eeb2446011d189700000e8322d00/frameset.htm">http://help.sap.com/saphelp_nw04/helpdata/en/cf/21eeb2446011d189700000e8322d00/frameset.htm</a>
<a href="http://help.sap.com/saphelp_nw04/helpdata/en/cf/21eebf446011d189700000e8322d00/frameset.htm">http://help.sap.com/saphelp_nw04/helpdata/en/cf/21eebf446011d189700000e8322d00/frameset.htm</a>
<a href="http://help.sap.com/saphelp_nw04/helpdata/en/cf/21eed9446011d189700000e8322d00/frameset.htm">http://help.sap.com/saphelp_nw04/helpdata/en/cf/21eed9446011d189700000e8322d00/frameset.htm</a>
Regards,
Gunasree.

What is dead locks with oracle and wht is race condition wrt oracle

what is dead locks with oracle and wht is race condition wrt oracle

> And do you know what a race condition is all about?
It is a term used to indicate several processes attempting to use the same resource that is not capable of servicing all these at the same time. This could be due to the resource not being thread safe or implemented as a serialised resource.
It is often easy to look up definitions on Google. In the Google search field, type "define:race condition".
The following [url http://www.google.co.za/search?hl=en&q=define%3Arace+condition&btnG=Google+Search&meta=]web definitions page is displayed.

DEAD LOCK ERROR

When we are using our oracle application, our session hang every time the user update records. the DBA said that we have a dead lock error... the only thing he did is to reset sa database every time we in counter this problem. but we have this error every day, and i don't have an ideal regarding what is dead lock.

you don't have a deadlock problem, because a deadlock will be "solved" as oracle simply kills the blocking session and rollbacks the changes.He is right. you might have blocking problem not dead lock problem. Find out the blocker and waiter and kill the blocker session.
Following query would give you an idea about who is blocking and who is waiting for :
select /*+ ordered */
a.sid blocker_sid,
-- c.sql_text,
a.username blocker_username,
a.serial#,
-- a.logon_time,
b.type,
b.lmode mode_held,
b.ctime time_held,
c.sid waiter_sid,
c.request request_mode,
c.ctime time_waited
from v$lock b, v$enqueue_lock c, v$session a, v$sqltext c
where c.address=a.prev_sql_addr and
a.sid = b.sid
and b.id1 = c.id1(+)
and b.id2 = c.id2(+)
and c.type(+) = 'TX'
and b.type = 'TX'
and b.block = 1
order by time_held, time_waited
Look for blocker_id and waiter_id. If possible, kill blocker using following command.
select sid,serial# from v$session where sid = blocker_sid;
alter system kill session 'sid,serial#'';
Jaffar

Dead Lock what made by another user!(patition table)

I have a question about Dead-Lock!
Our Situation is ..
User "A" made a Patition Table, ACNT_WONJANG
(without any Trigger,Function, Procedure)
When "B" - another user - tried to drop its Partition,
Dead-Lock invoked.
but A droped it's Partition well.
What can i Do?
this is the trace file.
/oracle/home/admin/ACNT/udump/ora_44478_acnt.trc
Oracle8i Enterprise Edition Release 8.1.7.0.0 - Production
With the Partitioning option
JServer Release 8.1.7.0.0 - Production
ORACLE_HOME = /oracle/home
System name: AIX
Node name: acnt
Release: 3
Version: 4
Machine: 000C962D4C00
Instance name: ACNT
Redo thread mounted by this instance: 1
Oracle process number: 15
Unix process pid: 44478, image: oracle@acnt (TNS V1-V3)
*** SESSION ID:(16.394) 2001-10-04 15:00:41.829
A self-deadlock among DDL and parse locks
is detected. In most cases, this self-deadlock
is handled internally.
This should be reported to Oracle Support
ONLY IF an error is signalled back to the
user on a command-line or screen.
The following information may aid in finding
user on a command-line or screen.
The following information may aid in finding
the problem.
ORA-04020: deadlock detected while trying to lock object
F03P.ACNT_WONJANG
session: 440786b4 request: X
LIBRARY OBJECT HANDLE: handle=43108348
name=F03P.ACNT_WONJANG
hash=76b93583 timestamp=NULL
namespace=TABL/PRCD/TYPE flags=KGHP/TIM/SML/[02000000]
kkkk-dddd-llll=0000-0001-0001 lock=S pin=S latch=0
lwt=43108360[43108360,43108360] ltm=43108368[43108368,43108368]
pwt=43108378[43108378,43108378] ptm=431083d0[431083d0,431083d0]
ref=43108350[43108350,43108350] lnd=431083dc[4310824c,425b7ec4]
LIBRARY OBJECT: object=431080d0
flags=NEX[0002] pflags= [00] status=VALD load=0
DATA BLOCKS:
data# heap pointer status pins change
0 431082d8 43108154 I/P/A 0 NONE
HEAP DUMP OF DATA BLOCK 0:
HEAP DUMP heap name="library cache" desc=0x431082d8
HEAP DUMP heap name="library cache" desc=0x431082d8
extent sz=0x224 alt=32767 het=8 rec=9 flg=2 opc=0
parent=30000030 owner=431080d0 nex=0 xsz=0x0
EXTENT 0
Chunk 431080c0 sz= 196 perm "perm "
alo=196
431080C0 500000C5 00000000 00000000 000000C4 [P...............]
431080D0 43108348 431080D4 431080D4 431080DC [C..HC...C...C...]
431080E0 431080DC 00000000 00000000 00020100 [C...............]
431080F0 00000000 00000000 00000000 00000000 [................]
43108100 43108144 00000000 00000000 00000000 [C..D............]
43108110 00000000 00000000 00000000 00000000 [................]
Repeat 2 times
43108140 00000000 431082D8 00000000 43108154 [....C.......C..T]
43108150 00000000 00000000 00000000 00000000 [................]
Repeat 1 times
43108170 00000000 00000000 00000019 00000000 [................]
43108180 00000000 [....]
Total heap size = 196
FREE LISTS:
Bucket 0 size=0
Total free space = 0
UNPINNED RECREATABLE CHUNKS (lru first):
Total free space = 0
UNPINNED RECREATABLE CHUNKS (lru first):
PERMANENT CHUNKS:
Chunk 431080c0 sz= 196 perm "perm "
alo=196
Permanent space = 196

carlyfromal wrote:
Here's the thing I myself have an Ipad 3 that I got from Ebay that is activation locked and I have the same issue. Can't get the info. Well,since Apple conveniently decided to discontinue selling the Ipad 3 the only way I could get one was to buy a used one,so it looks to me like they could have some mercy and help a person unlock the thing. We're not dishonest people that go around stealing things,yet because of Apple's brilliant(I use that term sarcastically) idea to put this stupid new crap in place people like us who have to buy second-hand products have to suffer and get screwed out of money we had to save up to buy this stuff! And all anyone can come up with is "well boohoo" or "tough luck" or whatever! But,what about the rights of the rest of us?! Some of you may find this a tad rude, but oh well,tough luck!
On the other hand, there are those of us that appreciate the theft protection provided by the latest IOS.
There are certain things to watch out for when purchasing used devices of any sort, the first of which is to ensure that you're not buying stolen property. Since you are unable to obtain cooperation from the seller, perhaps your device was stolen!

I can't remember my admin password for one of my iMacs. I'm locked out! What are my options?

I can't remember my admin password for one of my iMacs. I'm locked out! What are my options?

Resetting an account password

My ipad mini was stolen and i have activated the find my phone to lock it. how can i get the serial number off my itunes or icloud profile? and what are the chances that the find my iphone app works when someome erases the device?

my ipad mini has been stolen and i have activated the find my iphone to lock. now it is only a wifi device so what are the chances that a person can get hold of it and log onto wifi without the password of my device to unlock. does that not make the app rather less useful as i have to hope that the person is apt enough to log onto the internet but not enough to erase it and start afresh. is it possible to find my device even afte someone has erased it?

"Losing your iPhone feels lousy. Thankfully, iCloud can help you get it back. But if it looks like that’s not going to happen, new Find My iPhone features in iOS 7 make it harder for anyone who’s not you to use or sell your device. Now turning off Find My iPhone or erasing your device requires your Apple ID and password. Find My iPhone can also continue to display a custom message, even after your device is erased. And your Apple ID and password are required before anyone can reactivate it."
http://www.apple.com/icloud/features/#fmip

What are the security settings to lock down a form with fillable fields and yet allow someone with Reader to fill in the fields as will as save the form and print it?

What are the security settings to lock down a form with fillable fields and yet allow someone with Reader to fill in the fields as will as save the form and print it?

You want to allow someone to open your document and fill out the form (in the fields you have created), but not change or edit the form, right? Here's the answer - assuming you are using Acrobat Pro and someone will be opening the PDF using at least Acrobat Reader 9 and up:
Tools > Protection > Encrypt < Encrypt with Password
Answer YES to change the security.
A new window opens:
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          Changes Allowed: Select Commenting, filling in form fields, and signing signature fields
          Leave selected: "Enable text access for screen reader devices for the visually impaired"
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          Leave all other settings alone in "Options"
          OK - OK
          Re-enter the Permissions Password (the one you entered above)
          OK - OK
          Save the PDF to apply the security [notice that (SECURED0 will appear after the document title]

What are the relevent steps to take in tracking a lost iphone 5 taking into account that the battery was dead at the time

What are the relevent steps to take in tracking a lost iphone 5 taking into account that the battery was dead at the time

You would have neede to have "Find my phone" activated on the iphone
Log into icloud https://www.icloud.com/ and track.

I have a Win7Pro SP1 PC locked down with a Group Policy as it is a public facing PC. PDF fillable forms cannot be completed when logged on as the restricted user. The forms work as a normal user. What are the user requirements/permissions needed to fill f

I have a Win7Pro SP1 PC locked down with a Group Policy as it is a public facing PC. PDF fillable forms cannot be completed when logged on as the restricted user. The forms work as a normal user. What are the user requirements/permissions needed to fill forms?

Well, try this (I was able to fix my with these steps):
Go Utilities > Disk Utility
Select your Startup Disk, e.g. Macintosh HD
Then, under the First Aid Tab, click Verify Disk Permissions.
If there are errors, then click repair Disk Permissions.
After it is done, restart the computer and see if your problem is resolved.
I hope this help.
Zeke
www.ZekeYuen.com/blog/

Dead-code elimination--what are all the rules?

This article http://www-128.ibm.com/developerworks/library/j-jtp12214/ has an entire section on dead-code elimination (DCE).
Does anyone know what all the criteria are by which the hotspot JIT compiler can determine that code is "dead"?
One obvious criteria is if the code will never get executed. I think that the canonical example is code like this:
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       static void someMethod() {
               if (debug) {
       }Here, the compiler (javac as well as hotspot's JIT) can determine that someMethod has nothing inside it that could ever get executed, so it can be turned into an empty method.
If you look at that developerworks link above, he gives an even more interesting example for how hotspot's JIT can make sophisticated DCE based on inlining.
What I want to know is what are all the criteria that hotspot can use to decide that code is dead. Code that is never executed is always correct. But can it make more liberal decisions as to what counts as dead code?
Consider this code:
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     // don't use foo again, but do use barA smart compiler could recognize that the array declaration and allocation is actually useless, and simply do
     int bar = 1000;(Thank you Brian for this example.)

What are the rules? Naturally, the only definitive answer can be given can be given by the HotSpot JIT.
That's not a very satifying answer, but it's true. The server JIT, like most compilers, has been taught hundreds and hundreds simplifying transformations that, in part, enable dead code elimination. Enumerating the criteria is a nearly impossible task.
But, your specific example is an interesting case.
int[] foo = new int[1000];
int bar = foo.length;For simplicity, I assume foo and bar are locals to a method, and in this case, the 6.0 HotSpot Server JIT will recognize that foo is unchanged before the initialization of bar, and effectively change it to:
int[] foo = new int[1000];
int bar = 1000;The JIT can't get rid of the allocation of the new array without a more advanced optimization called Escape Analysis, which attempts to determine the dynamic scope of objects. Of course, if these two lines comprise the whole method, then the analysis is fairly trivial.
Any intervening code will make the analysis more complex:
int[] foo = new int[1000];
baz(foo);
int bar = foo.length;
qux(foo);The calls sites will preclude your desired optimization, unless the called methods baz and qux can be inlined and analyzed. The code in baz can neither modify foo nor allow it to escape, and qux can not allow it to escape.
HotSpot's implementation of escape analysis is not quite yet complete, but should be available relatively soon.

An already installd Acrobat 7 is asking to be re activated but all links, including phone activation are dead ended. What can I do??

An already installed Acrobat 7 is asking to be re activated but all links supplied by Adobe , including phone activation are dead ended. What can I do now?

Hi Silverfoxbk7r,
Please go through the link below.
Error: Activation Server Unavailable | CS2, Acrobat 7, Audition 3
Regards,
Anand

HT5278 Since updating my iPad 2 to IOS6 and activating my icloud for backup, my iPad has permanently locked. Message on screen is "iPad Not Backed Up". I click ok but no response. Cannot turn power off and cannot restore via my pc itunes. What are my opti

Since updating my iPad 2 to IOS6 and activating my icloud for backup, my iPad has permanently locked. Message on screen is "iPad Not Backed Up". I click ok but no response. Cannot turn power off and cannot restore via my pc itunes. What are my options?

Thanks to everyone who responded and related subject helped. Holding the home button and power button simultaneously for 10-15 seconds does unlock the screen. I can now use my ipad again. However, a futher problem has arisen since updating to IOS6 and activating icloud at same time, Although not sure if its related. The problem is that when connected to my PC the itunes message appears 'Cannot read ipad'. It instructs you to restore but keeps timing out after about 1 hour. This maybe internet issue but can't understand why itunes cannot read my ipad. May need to completely erase all content & reset. Or any other suggestions why this has happened?

What are the various reasons that result in locking an user login id .....

what are the various reasons that result in locking an user , for development server?

Hi,
Basic reason behind the locking user id is incorrect logons.
Goto Tcode : S_BCE_68001402 .
You can find the exact number of incorrect logons and reason.
regards,
Raju

Phone died when on with a Customer Service agent. Now both phones are dead...What do I do now? Trying to set up my iphone 4S and I have no phone to call them back.

Phone died when on with a Customer Service agent. Now both phones are dead...What do I do now? Trying to set up my iphone 4S and I have no phone to call them back.
I was told I can set up my phone service through iTunes, but I can't seem to figure out where to go at this point. Any help would be greatly appreciated!
Greg

what do you mean, it died? plug it into the power! :-)

What are dead locks in BW

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