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by: xixi |
last post by:
can someone explain to me what is internal p lock, internal s lock,
internal v lock? when i have IS lock or IX lock , i always have these
internal locks together for the application handle
Application handle = 261
Application ID =
AC100482.GD3A.00F85FE51898
Sequence number = 0006
Application name = db2jccmain
Authorization ID ...
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by: Bruce Pullen |
last post by:
DB2 v7.2 (FP7 - DB2 v7.1.0.68) on AIX 5.2.0.0.
We're seeing unexpected single row (then commit) insert locking
behaviour.
We're seeing Applications that already hold row-level W locks in
lock-wait, waiting to acquire row-level X locks. The lock-waits are
behind applications that have row-level X locks on different rows
(honestly). Both executing and lock-waiting applications have been
granted IX table locks.
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by: Christoph Zeltner |
last post by:
hi,
i am writing a thesis on the concurrency control in db2 udb and oracle. I
found in the documentary of db2, that
a resource holding a (U)pdate-Lock can still be requested by a read-lock
(e.g. S). If the U-Lock wants to convert to a write-lock, does the
transaction have to wait for the transaction with the S-lock to finish ? Can
it starve ? Is this the symmetric RUX-Protocoll ? Questions, so many
questions ...
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by: Sunny |
last post by:
Hi,
I can not understend completely the lock statement.
Actally what is locked:
1. the part of the code between {...}
or
2. the object in lock()
In the docs is written:
for 1: The lock keyword marks a statement block as a critical section by
obtaining the mutual-exclusion lock for a given object, executing a
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by: Invalid |
last post by:
I launch a worker thread that periodically reads a volatile bool
abortRequested, which could be set to true by my main form.
IOW, there is one thread that can read that bool and one different
thread that can set it. See code below for an overview.
In a C or C++ environment, my current approach would be
adequate (no need to acquire exclusive access to abortRequested).
I'm guessing that I'm still OK under C# because bool is a value
type....
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by: Nashat Wanly |
last post by:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnaskdr/html/askgui06032003.asp
Don't Lock Type Objects!
Why Lock(typeof(ClassName)) or SyncLock GetType(ClassName) Is Bad
Rico Mariani, performance architect for the Microsoft® .NET runtime
and longtime Microsoft developer, mentioned to Dr. GUI in an e-mail
conversation recently that a fairly common practice (and one that's,
unfortunately, described in some of our...
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by: Raj |
last post by:
I created a refresh deferred MQT, and during full refresh there were 4
or 5 lock waits, all waiting on a 'S' lock on Internal Catalog Cache ?
Can some one explain how to prevent this from happening?
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by: shenanwei |
last post by:
DB2 V8.2 on AIX, type II index is created.
I see this from deadlock event monitor.
5) Deadlocked Connection ...
Participant no.: 2
Lock wait start time: 09/18/2006 23:04:09.911774
......
Deadlocked Statement:
Type : Dynamic
Operation: Execute
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by: blangela |
last post by:
If you had asked me 5 years ago about the future of C++, I would have
told you that its future was assured for many years to come. Recently,
I have been starting to wonder.
I have been teaching C++ at a local polytechnical school here in
Vancouver, Canada for approximately 8 years. Six years ago, at the
height (or should I say volume?) of the internet bubble, I had 80+
students per semester in my C++ course. Now I am fortunate to have...
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by: Samuel R. Neff |
last post by:
When is it appropriate to use "volatile" keyword? The docs simply
state:
"
The volatile modifier is usually used for a field that is accessed by
multiple threads without using the lock Statement (C# Reference)
statement to serialize access.
"
But when is it better to use "volatile" instead of "lock" ?
|
by: marktang |
last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look !
Part I. Meaning of...
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by: Oralloy |
last post by:
Hello folks,
I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>".
The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed.
This is as boiled down as I can make it.
Here is my compilation command:
g++-12 -std=c++20 -Wnarrowing bit_field.cpp
Here is the code in...
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by: jinu1996 |
last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth.
The Art of Business Website Design
Your website is...
|
by: Hystou |
last post by:
Overview:
Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
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by: tracyyun |
last post by:
Dear forum friends,
With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
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by: agi2029 |
last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own....
Now, this would greatly impact the work of software developers. The idea...
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by: conductexam |
last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one.
At the time of converting from word file to html my equations which are in the word document file was convert into image.
Globals.ThisAddIn.Application.ActiveDocument.Select();...
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by: adsilva |
last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
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by: bsmnconsultancy |
last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...
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