| |
by: Li Kao |
last post by:
After incrementally increasing SORTHEAP (and the commensurate increase
in SHEAPTHRES) and *slightly* reducing the bufferpool size, I find
that my query is no longer taking advantage of async IO for reads. I
discovered this message in the db2diag.log:
====================================
PID:80850(db2agntp (LIKAO) 0) Appid:*LOCAL.db2inst1.031121211302
sort/list_services sqlsOptimizeNumMergeRuns Probe:10
Database:LIKAO
|
by: Erik Hendrix |
last post by:
Hi,
I have a quick question, when one sets the prefetch size = extent size, then
when doing a backup we will have 1 agent (db2bm) doing the reads. If we have
prefetch size a multiple of extent size AND we have multiple containers
and/or PARALLEL_IO set then not db2bm but the db2 prefetchers will read the
data.
Now no matter which one reads the data, it will still be read in 1 extent
size. Wouldn't it thus be much more efficient to...
|
by: Erik Hendrix |
last post by:
Hi,
I have a question here regarding setting the prefetch size. So far we took
the rule that for OLTP, prefetchsize = extent size and for DSS prefetchsize
= extent size * number.
However, especially due to the "Skip Scans" for indexes I started to
question this. It looks to me that for reading a index DB2 will or do a
synchronous read or he will have to scan the whole index and thus prefetch
the data correct? If this is so, then it...
|
by: Jean-Marc Blaise |
last post by:
Dear all,
If you do a SELECT * FROM TAB WHERE DATE=?, the explain plan might pick up a
TBSCAN and you'll see in db2exfmt PREFETCH=SEQUENTIAL.
Now, TAB is a MDC, and DATE is a dimension. The explain plan will pick up
the block index and db2exfmt indicates PREFETCH=NONE. However, monitoring
bufferpools shows async IO is done.
Would it make sense to have db2exfmt indicate in that case
|
by: Peter Osawa |
last post by:
Hi,
I'm receveing an IDataReader object that I bind to a combo list.
I'd like to be able to customize that object before binding it to combo,
but I don't know how to do it...
Ideal would be something aka:
foreach('MyField' in IDataReader.Rows){
|
| |
by: Ioannis Theoharis |
last post by:
Hi,
i have 3 tables calling father, child1, child2:
create table father(att0 int4);
create table child1() inherits(father);
create table child2() inherits(father);
i want to get all the instances of the hierarchy:
|
by: rdudejr |
last post by:
Hi all,
Ive got a database approx 350 GB in which Im getting very high Time
waited for prefetch. This is directly out of the snapshot for the db
(these are for the entire database I assume as I pulled it out of get
snapshot for all on {dbname})
Total buffer pool read time (milliseconds) = 45660639
Total buffer pool write time (milliseconds)= 42128058
Total elapsed asynchronous read time = 33856320
|
by: msasha |
last post by:
Hi all.
I'm trying to parse some HTML received from an untrusted remote source.
What I've been trying so far is something along the lines of:
var htmlString =
"<script language=\"text/javascript\">alert(\"Hello\");</script>" +
"<img src=\"http://www.jinchess.com/chessboard/?pos=Ra6\">";
var div = $doc.createElement('div');
div.innerHTML = htmlString;
|
by: dunleav1 |
last post by:
Does it make sense to set prefetch automatic on a temp tablespace?
|
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...
|
by: Hystou |
last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it.
First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
|
| |
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...
|
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...
|
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...
|
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();...
|
by: 6302768590 |
last post by:
Hai team
i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
|
by: muto222 |
last post by:
How can i add a mobile payment intergratation into php mysql website.
|
| |
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...
|
