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Published on 2010-05-05T16:12:16Z
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What is deadlock in sql server and when it arises? What are the issues with deadlock and how to resolve it?
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I found this kind of interesting problem in MySQL InnoDB engine, could anyone explain why the engine always claim it's a deadlock.
First, I created a table with a single row, single column:
CREATE TABLE `SeqNum` (`current_seq_num` bigint(30) NOT NULL default '0',
PRIMARY…
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I have an Oracle DB package that is routinely causing what I believe is an ITL (Interested Transaction List) deadlock. The relevant portion of a trace file is below.
Deadlock graph:
---------Blocker(s)-------- ---------Waiter(s)---------
Resource Name process session…
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Hello everyone,
I am using SQL Server 2008 Enterprise. I met with deadlock in the following store procedure, but because of my fault, I did not record the deadlock graph. But now I can not reproduce deadlock issue. I want to have a postmortem to find the root cause of deadlock to avoid deadlock in…
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Long time ago, I saved a sentence from a Java reference book: "Java has no mechanism to handle deadlock. it won't even know deadlock occurred." (Head First Java 2nd Edition, p.516)
So, what is about it? Is there a way to catch deadlock case in Java? I mean, is there a way that our code understands…
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Is your application scalable under increased activity? Timothy Claason brings us a methodology for testing how your application will deal with database load.
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I recently downloaded Ideras SQL virtual database, and tested it. There are a few things about this tool which caught my attention.My ScenarioIt is quite common in real life that sometimes observing or retrieving older data is necessary; however, it had changed as time passed by. The full database…
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To clone a database using Rman we used to require an existing Rman backup, on 11g we can clone databases using the "from active" database option.
In this case we do not require an existing backup, the active datafiles will be used as the source for the clone.
In order to clone with the source database…
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Hello,
I'm using cPickle to save my Database into file. The code looks like that:
def Save_DataBase():
import cPickle
from scipy import *
from numpy import *
a=Results.VersionName
#filename='D:/results/'+a[a.find('/')+1:-a.find('/')-2]+Results.AssType[:3]+str(random.randint(0,100))+Results.Distribution+"…
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Snapshot database is one of the most interesting concepts that I have used at some places recently.
Here is a quick definition of the subject from Book On Line:
A Database Snapshot is a read-only, static view of a database (the source database). Multiple snapshots can exist on a source database and…
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Database ??
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WebLogic Server/????????·????
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