What is external fragmentation?, Operating System

Assignment Help:

What is external fragmentation?

As process are removed from and loaded to the memory free memory space is bracken into pieces .external fragmentation take place when enough memory space exists to satisfy a request, however it isn't contagious, storage is fragmented in to large number of small holes.

External fragmentation: leftover holes are excessively small to hold a new program even though there may be enough total free memory to do so.
Bookkeeping for holes is able to be expensive a 1 byte hole requires an entire record in the table.
To decrease on space overhead, the memory is allocated in fixed-size blocks.

Related Discussions:- What is external fragmentation?

Allocating hole algorithm, simulate hole allocating ahogrithm

simulate hole allocating ahogrithm

Determine what a locality of reference entails, Locality of reference entai...

Locality of reference entails that the page reference being made by a process Locality of reference entails that the page reference being made by a process is similarly to be

Buffer, Ask question #Minimum 100 words accepted application of bounded and...

Ask question #Minimum 100 words accepted application of bounded and unbounded buffers

Explain file control list and user control list, Q. Researchers have recom...

Q. Researchers have recommended that instead of having an access list associated with each file (specifying which users can access the file and how) we should have a user control

List antivirus techniques used for protection purposes, Question: a) Th...

Question: a) There are main goals of data security. List them and elaborate on how they provide protection. b) Describe threats associated with data security. c) Describe

Define semaphore, Define semaphore A semaphore is a protected abstract ...

Define semaphore A semaphore is a protected abstract or variable data type that constitutes the classic method for restricting access to shared resources like shared memory in

Briefly explain about file system implementation, Briefly explain about fil...

Briefly explain about file system implementation? Several on-disk and in-memory structures are used to execute a file system. On disk, the file system may have information abou

Explain the basic method of paging method, Explain the basic method of pagi...

Explain the basic method of paging method. Physical memory is divided into the fixed-sized blocks called frames. Logical memory is as well divided into blocks of the same size

Parent and child process communicate in unix, Parent and Child process comm...

Parent and Child process communicate in unix A child and parent can interact through any of the normal inter-process communication schemes (pipes, message queues, sockets, s

Activities of operating system - memory management, Q. What are the three m...

Q. What are the three main activities of an operating system in regard to memory management? Answer: a. Keep follows of which parts of memory are currently being used and

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages