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Questions tagged [fragmentation]

An unefficient usage of disk storage in memory or hard drive.

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Index Organized Table Fragmentation

Hi I have been looking into Index Organized Tables. I am little confused about the fragmentation aspects. Oracle states that "heavy volume causes fragmentation resulting in a frequent need to reorganize. Because an index-organized table can be…
bdavies6086
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How to compute (some) landscape fragmentation index

I am working with rasters of forests and need to compute (some) fragmentation index. I am looking for "single-value" index for each raster. My first try was to do it in QGis but desirable plugin (LecoS – Land cover analytics) is damaged. Also I…
Ladislav Naďo
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How To Create File System Fragmentation?

Risk Factors for File Fragmentation include mostly full Disks and repeated file appends. What are other risk factors for file fragmentation? How would one make a program using common languages like C++/C#/VB/VB.NET to work with files & make new…
ExcelCyclist
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Is it a myth that Indexes are not used if they are fragmented?

Is it true that the SQL Server is not using indexes that are fragmented? How this could be possible and if it is, how the optimizer is making the decision when to use a index or not? I have searched around but not been able to find a formula/rules…
gotqn
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How to record every allocations and deallocations of memory on a program?

I want to see is fragmentation the reason of increasing memory usage of my twisted server. I have posted a question here: How to find the source of increasing memory usage of a twisted server? Now, what I am going to do is to visualize the heap. I…
Fang-Pen Lin
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Knowing when the last fragmented packet will arrive / all fragmented packets have arrived

I am trying to currently deal with IP packet fragmentation. I need to somehow flag fragmented packets with some value (sort them to a bucket according to some information), but I receive them after they're fragmented. I can't assure the order of the…
fashasha
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Netty message framing for data frames

I am implementing a very simple websocket server using Netty (v4). I am basing my code on the websocket example source code that comes with Netty. Do I need to do anything extra to handle framing/fragmentation/packet boundaries? Or can I assume that…
user2836744
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Logical address confusion

I am trying to do some analysis with the logical address. The following program explains my motive ... #include int main() { int x=10; printf("The address of main is %p\n",&main); printf("The address of x is %p\n",&x); return 0; } When…
Arpit
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Why are our IIS 6 Application pools taking up ten times the memory being consumed by the CLR

Our IIS 6.0 application pools take up on first load of a page 155Mb of memory. On subsequent refreshing of the same page the App pool memory consumed goes up to approx 245Mb. Its a webforms application and uses Entity Framework and DevExpress…
Mickey Puri
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Sequence Numbers in UDP

I was asked a interesting question relating to datagrams and how they are fragmented, namely what is used to re-assemble the original datagram. I know the ID number in every fragment will be the same to show that they all belong to one larger…
JimmyK
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Will internal fragmentation raise when increasing block size?

Smaller block size results in low internal fragmentation as compared larger block sizes. Is it possible to have more internal fragmentation with a smaller Block size as compared to a larger Block size if we are allowed to use typical block size…
Kipi Tole
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Fragmentation of IPv6 using BSD sockets

I'm writing a PMTUD app for both IPv4 and v6. I am doing this on Ubuntu 12.04, but I would like to make it as OS-independent as possible, and that's where I stumbled upon a problem. IPv6 packets get fragmented by the sender by default, and I do not…
user742925
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How to calculate heap fragmenation statistics using heap dumps

Does anyone knows if there is any tool out there to calculate the heap fragmentation using heap dumps?
mspapant
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ViewPager Inside Fragment that is part of tabs in FragmentActivity

I'm trying to build something that I'm not sure if it's possible. I have Fragment tabs (using FragmentActivity, TabHost and TabWidget as my fragment tabs container) and in each of the fragments I want to have, as top bar, another fragments. You can…
Nativ
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Why is my index getting fragmented?

I have a simple little table (just 8 fields) an hour ago I rebuilt one of the indexes on the table, which reset it to 0% fragmentation, but now it’s up to 38%. The table itself has 400k records in it, but only 158 new ones have been inserted since I…
Iain Hoult
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